ENGINE CONTROL SYSTEM

Transcription

1 ST TR SYST TTS 24 SRV RT... 4 X R T... 4 T o. ndex...4 lphabetical ndex...4 RUTS... 6 recaution for Supplemental Restraint System (SRS) "R B" and "ST BT R-T- SR"...6 n Board iagnosis (B) System of ngine...6 recaution...6 RRT...10 Special Service Tool...10 ommercial Service Tool...10 TR SYST...11 Schematic...11 Vacuum ose rawing...12 System hart...12 ultiport uel njection () System...12 istributor gnition () System...14 ir onditioning ut ontrol...15 uel ut ontrol (at o oad and igh ngine Speed)...16 ast dle am ()...16 BS SRV RUR...17 Basic nspection...17 rocedure fter Replacing...21 uel ressure heck...21 uel ressure Regulator heck...22 BR ST (B) SYST...23 ntroduction...23 Two Trip etection ogic...23 mission-related iagnostic nformation...23 alfunction ndicator amp ()...26 TRUB SS...29 Trouble iagnosis ntroduction...29 T nspection riority hart...33 ail-safe hart...34 Symptom atrix hart...35 ngine ontrol omponent arts ocation...38 ircuit iagram...43 arness onnector Terminal ayout...45 Terminal and Reference Value...45 SUT unction...50 SUT Reference Value in ata onitor ode...54 TRUB SS - ST VU...56 escription...56 Testing ondition...56 nspection rocedure...56 iagnosis rocedure...57 TRUB SS R TRTTT T...64 escription...64 iagnosis rocedure...64 WR SUY RU RUT...65 Wiring iagram...65 iagnosis rocedure...68 round nspection...71 T 0102, 0103 SSR...72 omponent escription...72 SUT Reference Value in ata onitor ode...72 n Board iagnosis ogic...72 T onfirmation rocedure...72 Wiring iagram...74 iagnosis rocedure...75 omponent nspection...76 T 0117, 0118 T SSR

2 omponent escription n Board iagnosis ogic T onfirmation rocedure Wiring iagram iagnosis rocedure omponent nspection T 0122, 0123 T SSR omponent escription SUT Reference Value in ata onitor ode n Board iagnosis ogic T onfirmation rocedure Wiring iagram iagnosis rocedure omponent nspection T S omponent escription SUT Reference Value in ata onitor ode n Board iagnosis ogic T onfirmation rocedure Wiring iagram iagnosis rocedure omponent nspection Removal and nstallation T S omponent escription SUT Reference Value in ata onitor ode n Board iagnosis ogic verall unction heck Wiring iagram iagnosis rocedure omponent nspection Removal and nstallation T 0327, 0328 S omponent escription n Board iagnosis ogic T onfirmation rocedure Wiring iagram iagnosis rocedure omponent nspection Removal and nstallation T 0340 SSR omponent escription SUT Reference Value in ata onitor ode n Board iagnosis ogic T onfirmation rocedure Wiring iagram iagnosis rocedure omponent nspection Removal and nstallation T 0505 S SYST escription SUT Reference Value in ata onitor ode n Board iagnosis ogic T onfirmation rocedure Wiring iagram iagnosis rocedure omponent nspection Removal and nstallation T omponent escription n Board iagnosis ogic T onfirmation rocedure iagnosis rocedure T 1217 VR TRTUR..115 n Board iagnosis ogic verall unction heck iagnosis rocedure ain 11 auses of verheating S omponent escription SUT Reference Value in ata onitor ode Wiring iagram iagnosis rocedure omponent nspection Removal and nstallation S1 TR escription SUT Reference Value in ata onitor ode Wiring iagram iagnosis rocedure omponent nspection Removal and nstallation V S SSR omponent escription Wiring iagram iagnosis rocedure SWT omponent escription SUT Reference Value in ata onitor ode Wiring iagram iagnosis rocedure T S omponent escription SUT Reference Value in ata onitor ode Wiring iagram iagnosis rocedure Removal and nstallation TR RUT...143

3 omponent escription SUT Reference Value in ata onitor ode Wiring iagram iagnosis rocedure omponent nspection Removal and nstallation STRT S SUT Reference Value in ata onitor ode Wiring iagram iagnosis rocedure U U RUT escription SUT Reference Value in ata onitor ode Wiring iagram iagnosis rocedure omponent nspection Removal and nstallation WR STR RSSUR SWT omponent escription SUT Reference Value in ata onitor ode Wiring iagram iagnosis rocedure omponent nspection Removal and nstallation V- S VV omponent escription Wiring iagram iagnosis rocedure omponent nspection Removal and nstallation T TR Wiring iagram TR S Wiring iagram VRTV SS SYST escription omponent nspection STV RS VTT escription nspection SRV T STS (SS) uel ressure Regulator dle Speed and gnition Timing gnition oil ass ir low Sensor ngine oolant Temperature Sensor uel ump V- Valve njector Resistor Throttle osition Sensor eated xygen Sensor 1 eater

4 SRV RT X R T T o. ndex X R T : T* 1 SUT ST* 2 * 3 tems (SUT screen terms) Trip lighting up : pplicable : ot applicable Reference page Unable to access T S TT. URTR TST Y B RQUR S/RUT-B S/RUT-B T S/RUT T S/RUT T S/RUT T S/RUT S1 (B1) S1 (B1) S/R-B S/R-B S/R-B S SYST/R VR T *1: 1st trip T o. is the same as T o. *2: This number is prescribed by S *3: This number is controlled by SS, and displayed in iagnostic Test ode (Self-diagnostic results). lphabetical ndex : tems (SUT screen terms) T* 1 SUT ST* 2 * 3 Trip lighting up : pplicable : ot applicable Reference page Unable to access -34 S/R-B T S/RUT T S/RUT VR T S1 (B1) S1 (B1) S SYST/R S/R-B S/R-B

5 X R T tems (SUT screen terms) S/RUT-B S/RUT-B T S TT. URTR TST Y B RQUR. *1: 1st trip T o. is the same as T o. T* 1 SUT ST* 2 * T S/RUT T S/RUT *2: This number is prescribed by S *3: This number is controlled by SS, and displayed in iagnostic Test ode (Self-diagnostic results). Trip lighting up Reference page -5

6 RUTS RUTS recaution for Supplemental Restraint System (SRS) "R B" and "ST BT R-TSR" : The Supplemental Restraint System such as R B and ST BT R-TSR, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. nformation necessary to service the system safely is included in the SRS and SB section of this Service anual. WR: To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized SS/T dealer. mproper maintenance, including incorrect removal and installation of the SRS can lead to personal injury caused by unintentional activation of the system. or removal of Spiral able and ir Bag odule, see the SRS section. o not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service anual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors. RUTS W US WR TS (R R TR) RS WR: When working near the irbag iagnosis Sensor Unit or other irbag System sensors with the gnition or engine running, T use air or electric power tools or strike near the sensor(s) with a hammer. eavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing serious injury. When using air or electric power tools or hammers, always switch the gnition, disconnect the battery, and wait at least 3 minutes before performing any service. n Board iagnosis (B) System of ngine : The has an on board diagnostic system. t will light up the malfunction indicator lamp () to warn the driver of a malfunction causing emission deterioration. UT: Be sure to turn the ignition switch and disconnect the negative battery cable before any repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. will cause the to light up. Be sure to connect and lock the connectors securely after work. loose (unlocked) connector will cause the to light up due to the open circuit. (Be sure the connector is free from water, grease, dirt, bent terminals, etc.) ertain systems and components, especially those related to B, may use a new style slide-locking type harness connector. or description and how to disconnect, refer to -35, "escription". Be sure to route and secure the harnesses properly after work. The interference of the harness with a bracket, etc. may cause the to light up due to the short circuit. Be sure to erase the unnecessary malfunction information (repairs completed) from the before returning the vehicle to the customer. recaution lways use a 12 volt battery as power source. o not attempt to disconnect battery cables while engine is running. Before connecting or disconnecting the harness connector, turn ignition switch and disconnect negative battery cable. ailure to do so may damage the because battery voltage is applied to even if ignition switch is turned. Before removing parts, turn ignition switch and then disconnect negative battery cable. : S289-6

7 RUTS o not disassemble. f a battery cable is disconnected, the memory will return to the value. The will now start to self-control at its initial value. Thus, the engine operation can vary slightly in this case. owever, this is not an indication of a malfunction. o not replace parts because of a slight variation. f the battery is disconnected, the following emission-related diagnostic information will be lost within 24 hours. - iagnostic trouble codes - 1st trip diagnostic trouble codes - reeze frame data - 1st trip freeze frame data - Test values When connecting harness connector (1), fasten (B) it securely with a lever as far as it will go as shown in the figure. - (2) - oosen () B9222 When connecting or disconnecting pin connectors into or from, take care not to damage pin terminals (bend or break). ake sure that there are not any bends or breaks on pin terminal, when connecting pin connectors. Securely connect harness connectors. poor connection can cause an extremely high (surge) voltage to develop in coil and condenser, thus resulting in damage to s. eep engine control system harness at least 10 cm (4 in) away from adjacent harness, to prevent engine control system malfunctions due to receiving external noise, degraded operation of s, etc. eep engine control system parts and harness dry. Before replacing, perform Terminals and Reference Value inspection and make sure functions properly. Refer to -45, " Terminal and Reference Value". andle mass air flow sensor carefully to avoid damage. o not disassemble mass air flow sensor. o not clean mass air flow sensor with any type of detergent. o not disassemble electric throttle control actuator. ven a slight leak in the air intake system can cause serious incidents. BB2947 BB

8 RUTS fter performing each TRUB SS, perform T onfirmation rocedure or verall unction heck. The T should not be displayed in the T onfirmation rocedure if the repair is completed. The verall unction heck should be a good result if the repair is completed. SB1315ZZ When measuring signals with a circuit tester, never allow the two tester probes to contact. ccidental contact of probes will cause a short circuit and damage the power transistor. S348 o not operate fuel pump when there is no fuel in lines. - uel pump assembly (1) Tighten fuel hose clamps to the specified torque. B0537ZZ -8

9 RUTS o not depress accelerator pedal when starting. mmediately after starting, do not rev up engine unnecessarily. o not rev up engine just prior to shutdown. When installing.b. ham radio or a mobile phone, be sure to observe the following as it may adversely affect electronic control systems depending on installation location. - eep the antenna as far as possible from the electronic control units. - eep the antenna feeder line more than 20 cm (8 in) away from the harness of electronic controls. o not let them run parallel for a long distance. - djust the antenna and feeder line so that the standing-wave radio can be kept smaller. - Be sure to ground the radio to vehicle body. S709Y S708Y -9

10 RRT Special Service Tool RRT : Tool number Tool name Radiator cap tester adapter escription dapting radiator cap tester to radiator cap and radiator filler neck a: 28 (1.10) dia. b: 31.4 (1.236) dia. c: 41.3 (1.626) dia. Unit: mm (in) ommercial Service Tool S-T564 : Tool name uel filler cap adapter escription hecking fuel tank vacuum relief valve opening pressure Socket wrench T653 Removing and installing engine coolant temperature sensor xygen sensor thread cleaner nti-seize lubricant i.e.: (ermatex 133R or equivalent meeting specification --907) T Reconditioning the exhaust system threads before installing a new oxygen sensor. Use with anti-seize lubricant shown in ommercial Service tools. a: 18 mm diameter with pitch 1.5 mm, for Zirconia xygen Sensor b: 12 mm diameter with pitch 1.25 mm, for Titania xygen Sensor ubricating oxygen sensor thread cleaning tool when reconditioning exhaust system threads

11 TR SYST Schematic TR SYST : SB3510B -11

12 Vacuum ose rawing TR SYST : B0557ZZ 1. uel pressure regulator 2. ir duct 3. V canister ever use soapy water or any type of solvent while installing vacuum hoses or purge hoses. Refer to -11, "Schematic" for vacuum control system. System hart : nput (Sensor) function utput (ctuator) amshaft position sensor ass air flow sensor ngine coolant temperature sensor eated oxygen sensor 1 gnition switch Throttle position sensor ark/neutral position () switch ir conditioner switch nock sensor Battery voltage ower steering oil pressure switch Vehicle speed sensor ultiport uel njection () System UT/UTUT S RT uel injection & mixture ratio control istributor ignition system dle air control system uel pump control eated oxygen sensor 1 monitor & on board diagnostic system eated oxygen sensors 1 heater control ir conditioning cut control uel injector ower transistor V- valve and V- solenoid valve uel pump relay alfunction indicator lamp (n the instrument panel) eated oxygen sensor heater ir conditioner relay :

13 TR SYST amshaft position sensor ass air flow sensor ngine coolant temperature sensor eated oxygen sensor 1 Throttle position sensor ark/neutral position () switch Vehicle speed sensor gnition switch ir conditioner switch nock sensor Battery ower steering oil pressure switch Sensor nput signal to function ctuator ngine speed and piston position mount of intake air ngine coolant temperature ensity of oxygen in exhaust gas Throttle position Throttle valve idle position ear position Vehicle speed Start signal ir conditioner operation ngine knocking condition Battery voltage ower steering operation uel injection & mixture ratio control uel injector SYST SRT The amount of fuel injected from the fuel injector is determined by the. The controls the length of time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the memory. The program value is preset by engine operating conditions. These conditions are determined by input signals (for engine speed and intake air) from both the camshaft position sensor and the mass air flow sensor. VRUS U T RS/RS ST n addition, the amount of fuel injected is compensated to improve engine performance under various operating conditions as listed below. <uel increase> uring warm-up When starting the engine uring acceleration ot-engine operation igh-load, high-speed operation <uel decrease> uring deceleration uring high engine speed operation XTUR RT B TR (S TR) BB2953 The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission control. The three way catalyst can then better reduce, and x emissions. This system uses a heated oxygen sensor 1 in the exhaust manifold to monitor whether the engine operation is rich or lean. The adjusts the injection pulse width according to the sensor voltage signal. or more information about the heated oxygen sensor 1, refer to -87, "omponent escription". This maintains the mixture ratio within the range of stoichiometric (ideal air-fuel mixture). This stage is referred to as the closed loop control condition. pen oop ontrol The open loop system condition refers to when the detects any of the following conditions. eedback control stops in order to maintain stabilized fuel combustion. -13

14 TR SYST eceleration and acceleration igh-load, high-speed operation alfunction of heated oxygen sensor 1 or its circuit nsufficient activation of heated oxygen sensor 1 at low engine coolant temperature igh engine coolant temperature uring warm-up When starting the engine XTUR RT S-R TR The mixture ratio feedback control system monitors the mixture ratio signal transmitted from the heated oxygen sensor 1. This feedback signal is then sent to the. The controls the basic mixture ratio as close to the theoretical mixture ratio as possible. owever, the basic mixture ratio is not necessarily controlled as originally designed. Both manufacturing differences (i.e., mass air flow sensor hot film) and characteristic changes during operation (i.e., fuel injector clogging) directly affect mixture ratio. ccordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This is then computed in terms of injection pulse duration to automatically compensate for the difference between the two ratios. uel trim refers to the feedback compensation value compared against the basic injection duration. uel trim includes short term fuel trim and long term fuel trim. Short term fuel trim is the short-term fuel compensation used to maintain the mixture ratio at its theoretical value. The signal from the heated oxygen sensor 1 indicates whether the mixture ratio is R or compared to the theoretical value. The signal then triggers a reduction in fuel volume if the mixture ratio is rich, and an increase in fuel volume if it is lean. ong term fuel trim is overall fuel compensation carried out long-term to compensate for continual deviation of the short term fuel trim from the central value. Such deviation will occur due to individual engine differences, wear over time and changes in the usage environment. U T T Two types of systems are used. S337W Sequential ultiport uel njection System uel is injected into each cylinder during each engine cycle according to the firing order. This system is used when the engine is running. Simultaneous ultiport uel njection System uel is injected simultaneously into all four cylinders twice each engine cycle. n other words, pulse signals of the same width are simultaneously transmitted from the. The four fuel injectors will then receive the signals two times for each engine cycle. This system is used when the engine is being started and/or if the fail-safe system (U) is operating. U SUT- uel to each cylinder is cut off during deceleration or operation of the engine at excessively high speeds. istributor gnition () System UT/UTUT S RT :

15 TR SYST amshaft position sensor ass air flow sensor ngine coolant temperature sensor Throttle position sensor Vehicle speed sensor gnition switch nock sensor ark/neutral position () switch Battery Sensor nput signal to function ctuator SYST SRT The ignition timing is controlled by the to maintain the best air-fuel ratio for every running condition of the engine. The ignition timing data is stored in the. The receives information such as the injection pulse width and camshaft position sensor signal. omputing this information, ignition signals are transmitted to the power transistor. uring the following conditions, the ignition timing is revised by the according to the other data stored in the. t starting uring warm-up t idle t low battery voltage uring acceleration The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not operate under normal driving conditions. f engine knocking occurs, the knock sensor monitors the condition. The signal is transmitted to the. The retards the ignition timing to eliminate the knocking condition. ir onditioning ut ontrol : UT/UTUT S RT ngine speed and piston position mount of intake air ngine coolant temperature Throttle position Throttle valve idle position Vehicle speed Start signal ngine knocking ear position Battery voltage gnition timing control ower transistor ir conditioner switch Throttle position sensor amshaft position sensor ngine coolant temperature sensor gnition switch Vehicle speed sensor ower steering oil pressure switch Sensor nput Signal to unction ctuator ir conditioner signal Throttle valve opening angle ngine speed ngine coolant temperature Start signal Vehicle speed ower steering operation ir conditioner cut control ir conditioner relay SYST SRT This system improves engine operation when the air conditioner is used. Under the following conditions, the air conditioner is turned off. When the accelerator pedal is fully depressed. When cranking the engine. When the engine coolant temperature becomes excessively high. When operating power steering and air conditioner during low engine speed or when fully releasing accelerator pedal. When engine speed is excessively low. -15

16 TR SYST uel ut ontrol (at o oad and igh ngine Speed) : UT/UTUT S RT Vehicle speed sensor ark/neutral position () switch Throttle position sensor amshaft position sensor Sensor nput Signal to unction ctuator Vehicle speed eutral position Throttle position ngine speed SYST SRT f the engine speed is above 3,000 rpm under no load, (for example, the shift position is eutral and engine speed is over 3,000 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies based on engine speed. uel cut will operate until the engine speed reaches 1,500 rpm, then fuel cut is cancelled. T: This function is different from deceleration control listed under -12, "ultiport uel njection () System". ast dle am () : T SRT The is installed on the throttle body to maintain adequate engine speed while the engine is cold. t is operated by a volumetric change in wax located inside the thermo-element. The thermo-element is operated by engine coolant temperature. or inspection refer to -17, "Basic nspection". uel cut control uel injector S500V -16

17 BS SRV RUR Basic nspection BS SRV RUR : ST STRT 1. heck service records for any recent repairs that may indicate a related malfunction, or a current need for scheduled maintenance. 2. pen engine hood and check the following: - arness connectors for improper connections - Wiring harness for improper connections, pinches and cut - Vacuum hoses for splits, kinks and improper connections - oses and ducts for leaks - ir cleaner clogging - asket 3. onfirm that electrical or mechanical loads are not applied. - eadlamp switch is. - ir conditioner switch is. - Rear window defogger switch is. S983U - Steering wheel is in the straight-ahead position, etc. 4. Start engine and warm it up until engine coolant temperature indicator points the middle of gauge. nsure engine stays below 1,000 rpm. S Run engine at about 2,000 rpm for about 2 minutes under no load. 6. ake sure that no T is displayed with SUT or ST. (With SUT) >> T 2. (With ST) >> T 9. >> Repair or replace components as necessary according to corresponding iagnostic rocedure. 2. UT With SUT 1. djust accelerator wire. Refer to -3, "djusting ccelerator Wire". 2. Warm up engine to 75 (167 ). 3. Stop engine and wait at least 5 seconds, then turn ignition switch. 4. Select T/S in T TR mode with SUT. S977U -17

18 BS SRV RUR 5. When the engine coolant temp is 75 to 85 (167 to 185 ), check that the clearance between stopper and throttle drum (2) is less than 0.05 mm ( in) using feeler gauge (1) as shown in the figure. - Throttle adjust screw (3) - This figure shows a view with air cleaner removed. >> T 3. >> 1. Replace throttle body assembly. Refer to -12, "Removal and nstallation". 2. T T T WB0609ZZ With SUT 1. Start engine and warm it up to normal operating temperature. 2. Select T T in WR SURT mode. 3. Touch STRT. 4. heck ignition timing at idle using timing light. Refer to -172, "dle Speed and gnition Timing". >> T 4. >> 1. djust ignition timing by turning distributor. 2. T 4. S320V 4. BS S With SUT 1. Select T T in WR SURT mode and touch STRT. 2. heck idle speed. Refer to -172, "dle Speed and gnition Timing". >> T 5. >> 1. djust base idle speed by turning idle speed adjusting screw. 2. T TRTT ST SSR ST With SUT 1. Warm up engine to normal operating temperature. 2. Stop engine and turn ignition switch. 3. Select TRT S S and S T S in T TR mode. 4. Read the indications with accelerator pedal fully released. TRT S S S T S : V : >> T 8. >> T 6. 6.UST TRTT ST SSR ST With SUT 1. oosen throttle position sensor fixing bolts. -18

19 BS SRV RUR 2. djust TRT S S indication to 0.5 V by rotating throttle position sensor body (2) clockwise/counterclockwise. - Throttle body (1) 3. Retighten throttle position sensor fixing bolts. >> T 7. 7.RST ST RY With SUT 1. Start engine and warm it up to normal operating temperature. 2. Select S T S in T TR mode with SUT. 3. Stop engine. 4. Turn ignition switch and wait at least 5 seconds. 5. Turn ignition switch and wait at least 5 seconds. 6. Repeat steps 4 and 5 until S T S indication changes to. WB0610ZZ >> T TRT S With SUT 1. Start engine and warm it up to normal operating temperature. 2. Select S in T TR mode. 3. heck idle speed. Refer to -172, "dle Speed and gnition Timing". >> T 16. >> 1. djust base idle speed by turning idle speed adjusting screw. 2. T UT With ST 1. djust accelerator wire. Refer to -3, "djusting ccelerator Wire". 2. Warm up engine to 75 (167 ). 3. Stop engine and wait at least 5 seconds, then turn ignition switch. 4. Select Service $01with ST. 5. When the engine coolant temp is 75 to 85 (167 to 185 ), check that the clearance between stopper and throttle drum (2) is less than 0.05 mm ( in) using feeler gauge (1) as shown in the figure. - Throttle adjust screw (3) - This figure shows a view with air cleaner removed. >> T 10. >> 1. Replace throttle body assembly. Refer to -12, "Removal and nstallation". 2. T T T WB0609ZZ Without SUT 1. Warm up engine to normal operating temperature. 2. Stop engine and disconnect throttle position sensor harness connector. 3. Start engine. 4. Rev engine (2,000 to 3,000 rpm) two or three times under no load and then run engine at idle speed. -19

20 BS SRV RUR 5. heck ignition timing at idle using timing light. Refer to -172, "dle Speed and gnition Timing". >> T 11. >> 1. djust ignition timing by turning distributor. 2. T 11. S320V 11. BS S Without SUT ake sure that engine speed falls to the following speed. Refer to -172, "dle Speed and gnition Timing". >> T 12. >> 1. djust base idle speed by turning idle speed adjusting screw. 2. T TRTT ST SSR ST Without SUT 1. Warm up engine to normal operating temperature. 2. Stop engine and turn ignition switch. 3. heck voltage between terminal 37 and ground. Voltage >> T 15. >> T 13. : V 13.UST TRTT ST SSR ST Without SUT 1. oosen throttle position sensor fixing bolts. 2. djust voltage between terminal 37 and ground to 0.5 V by rotating throttle position sensor body (2) clockwise/counterclockwise. - Throttle body (1) B1471ZZ >> T RST ST RY Without SUT 1. Start engine and warm it up to normal operating temperature. 2. Stop engine. 3. Turn ignition switch and wait at least 5 seconds. 4. Turn ignition switch and wait at least 5 seconds. 5. Repeat steps 3 and 4 for 10 times. WB0610ZZ -20

21 BS SRV RUR >> T TRT S Without SUT 1. Start engine and warm it up to normal operating temperature. 2. heck idle speed. Refer to -172, "dle Speed and gnition Timing". >> T 16. >> 1. djust base idle speed by turning idle speed adjusting screw. 2. T RS USSRY T fter this inspection, unnecessary T o. might be displayed. rase the stored memory in. Refer to W T RS S-RT ST RT in -23, "missionrelated iagnostic nformation". >> ST rocedure fter Replacing When replacing, the following procedure must be performed. 1. erform -17, "Basic nspection". uel ressure heck U RSSUR RS With SUT 1. Turn ignition switch. 2. erform U RSSUR RS in WR SURT mode with SUT. 3. fter engine stalls, crank it two or three times to release all fuel pressure. 4. Turn ignition switch. : : Without SUT 1. Remove fuse for fuel pump. - uel pump relay (1) - use block (2) 2. Start engine. 3. fter engine stalls, crank it two or three times to release all fuel pressure. 4. Turn ignition switch. 5. Reinstall fuel pump fuse after servicing fuel system. B0559ZZ U RSSUR Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger. T: When reconnecting fuel line, always use new clamps. ake sure that clamp screw does not contact adjacent parts. Use a torque driver to tighten clamps. Use ressure auge to check fuel pressure. o not perform fuel pressure check with system operating. uel pressure gauge may indicate false readings. -21

22 BS SRV RUR 1. Release fuel pressure to zero. 2. isconnect fuel hose between fuel filter and fuel tube (engine side). 3. nstall pressure gauge between fuel filter and fuel tube. 4. Start engine and check for fuel leakage. 064B 5. Read the indication of fuel pressure gauge. t idle speed: With vacuum hose connected With vacuum hose disconnected f results are unsatisfactory, perform -22, "uel ressure Regulator heck". uel ressure Regulator heck pproximately 235 ka (2.35 bar, 2.4 kg/cm 2, 34 psi) pproximately 294 ka (2.94 bar, 3.0 kg/cm 2, 43 psi) S318V : Stop engine and disconnect fuel pressure regulator vacuum hose from intake manifold. 2. lug intake manifold with a rubber cap. 3. onnect variable vacuum source to fuel pressure regulator. 4. Start engine and read indication of fuel pressure gauge as vacuum is changed. uel pressure should decrease as vacuum increases. f results are unsatisfactory, replace fuel pressure regulator. S718B -22

23 BR ST (B) SYST BR ST (B) SYST ntroduction : The has an on board diagnostic system which detects malfunctions related to engine sensors or actuators. The also records various emission-related diagnostic information including: iagnostic Trouble ode (T) Service $03 of S reeze rame data Service $02 of S st Trip iagnostic Trouble ode (1st Trip T) Service $07 of S st Trip reeze rame data Test values and Test limits Service $06 of S The above information can be checked using procedures listed in the table below. : pplicable : ot applicable *: When T and 1st trip T simultaneously appear on the display, they cannot be clearly distinguished from each other. The malfunction indicator lamp () on the instrument panel lights up when the same malfunction is detected in two consecutive trips (Two trip detection logic), or when the enters fail-safe mode. (Refer to -34, "ail-safe hart".) Two Trip etection ogic T 1st trip T reeze rame data : When a malfunction is detected for the first time, 1st trip T and 1st trip reeze rame data are stored in the memory. The will not light up at this stage. <1st trip> f the same malfunction is detected again during the next drive, the T and reeze rame data are stored in the memory, and the lights up. The lights up at the same time when the T is stored. <2nd trip> The trip in the Two Trip etection ogic means a driving mode in which self-diagnosis is performed during vehicle operation. Specific on board diagnostic items will cause the to light up the, and store T and reeze rame data, even in the 1st trip. Refer to -4, "T o. ndex". mission-related iagnostic nformation SS-RT ST RT TS 1st trip reeze rame data Test value SUT ST * T*1*2 SUT ST 0000 tems (SUT screen terms) T S TT. URTR TST Y B RQUR. Test value/ Test limit (ST only) 1st trip T : : pplicable : ot applicable Reference page 0102 S/RUT-B S/RUT-B T S/RUT T S/RUT T S/RUT T S/RUT S1 (B1) S1 (B1) S/R-B S/R-B

24 BR ST (B) SYST T*1*2 SUT ST tems (SUT screen terms) 0340 S/R-B S SYST/R VR T -115 *1: 1st trip T o. is the same as T o. *2: This number is prescribed by S Test value/ Test limit (ST only) 1st trip T Reference page T 1ST TR T The 1st trip T (whose number is the same as the T number) is displayed for the latest self-diagnostic result obtained. f the memory was cleared previously, and the 1st trip T did not recur, the 1st trip T will not be displayed. f a malfunction is detected during the 1st trip, the 1st trip T is stored in the memory. The will not light up (two trip detection logic). f the same malfunction is not detected in the 2nd trip (meeting the required driving pattern), the 1st trip T is cleared from the memory. f the same malfunction is detected in the 2nd trip, both the 1st trip T and T are stored in the memory and the lights up. n other words, the T is stored in the memory and the lights up when the same malfunction occurs in two consecutive trips. f a 1st trip T is stored and a non-diagnostic operation is performed between the 1st and 2nd trips, only the 1st trip T will continue to be stored. or malfunctions that blink or light up the during the 1st trip, the T and 1st trip T are stored in the memory. rocedures for clearing the T and the 1st trip T from the memory are described W T RS SS-RT ST RT. or malfunctions in which 1st trip Ts are displayed, refer to SS-RT ST R- T TS. These items are required by legal regulations to continuously monitor the system/component. n addition, the items monitored non-continuously are also displayed on SUT. 1st trip T is specified in Service $07 of S st trip T detection occurs without lighting up the and therefore does not warn the driver of a malfunction. owever, 1st trip T detection will not prevent the vehicle from being tested, for example during nspection/aintenance (/) tests. When a 1st trip T is detected, check, print out or write down and erase (1st trip) T and reeze rame data as specified in Work low procedure Step 2, refer to -29, "Trouble iagnosis ntroduction". Then perform T onfirmation rocedure or verall unction heck to try to duplicate the malfunction. f the malfunction is duplicated, the item requires repair. ow to read T and 1st Trip T T and 1st trip T can be read by the following methods. With SUT With ST SUT or ST (eneric Scan Tool) xamples: 0340, 1143, 1706, etc. These Ts are prescribed by S (SUT also displays the malfunctioning component or system.) 1st trip T o. is the same as T o. utput of a T indicates a malfunction. owever, ST does not indicate whether the malfunction is still occurring or has occurred in the past and has returned to normal. SUT can identify malfunction status as shown below. Therefore, using SUT (if available) is recommended. T or 1st trip T of a malfunction is displayed in S ST RSUT mode of SUT. Time data indicates how many times the vehicle was driven after the last detection of a T. f the T is being detected currently, the time data will be [0]. f a 1st trip T is stored in the, the time data will be [1t]. RZ R T 1ST TR RZ R T The records the driving conditions such as fuel system status, calculated load value, engine coolant temperature, short term fuel trim, long term fuel trim, engine speed, vehicle speed, throttle valve opening, base fuel schedule and intake air temperature at the moment a malfunction is detected. ata which are stored in the memory, along with the 1st trip T, are called 1st trip freeze frame data. The data, stored together with the T data, are called freeze frame data and displayed on SUT or ST. The 1st trip freeze frame data can only be displayed on the SUT screen, not on the ST. or details, see -50, "SUT unction". -24

25 BR ST (B) SYST -25 nly one set of freeze frame data (either 1st trip freeze frame data or freeze frame data) can be stored in the. There is no priority for 1st trip freeze frame data and it is updated each time a different 1st trip T is detected. owever, once freeze frame data (2nd trip detection/ on) is stored in the memory, 1st trip freeze frame data is no longer stored. Remember, only one set of freeze frame data can be stored in the. owever, once freeze frame data is stored in the memory, 1st trip freeze data is no longer stored (because only one freeze frame data or 1st trip freeze frame data can be stored in the ). f freeze frame data is stored in the memory, the first (original) freeze frame data remains unchanged in the memory. Both 1st trip freeze frame data and freeze frame data (along with the Ts) are cleared when the memory is erased. rocedures for clearing the memory are described in W T RS SS- RT ST RT. TST VU TST T (ST Y T B T SUT) The following is the information specified in Service $06 of S The test value is a parameter used to determine whether a system/circuit diagnostic test is while being monitored by the during self-diagnosis. The test limit is a reference value which is specified as the maximum or minimum value and is compared with the test value being monitored. These data (test value and test limit) are specified by Test (T) and omponent () and can be displayed on the ST screen. tem Self-diagnostic test item T TYST Three way catalyst function 2S eated oxygen sensor 1 2S TR W T RS SS-RT ST RT Test value (ST display) Test limit onversion ow to rase T (With SUT) T: f the ignition switch stays after repair work, be sure to turn ignition switch once. Wait at least 5 seconds and then turn it (engine stopped) again. 1. Select with SUT. 2. Select S- RSUTS. 3. Select RS. (The T in the will be erased.) ow to rase T (With ST) T: f the ignition switch stays after repair work, be sure to turn ignition switch once. Wait at least 5 seconds and then turn it (engine stopped) again. 1. Select Service $04 with ST (eneric Scan Tool). T: f the battery is disconnected, the emission-related diagnostic information will be lost within 24 hours. The following data are cleared when the memory is erased. 1. iagnostic trouble codes 2. 1st trip diagnostic trouble codes 3. reeze frame data 4. 1st trip freeze frame data 5. Test values eated oxygen sensor 1 heater T ax. 1/ in ax. 16 ms in. 10 mv B 04 ax. 10 mv ax. 10 mv ax. 1s ax. 20 mv in. 20 mv

26 BR ST (B) SYST ctual work procedures are explained using a T as an example. Be careful so that not only the T, but all of the data listed above, are cleared from the memory during work procedures. alfunction ndicator amp () SRT The is located on the instrument panel. 1. The will light up when the ignition switch is turned without the engine running. This is a bulb check. f the does not light up, check circuit. Refer to -165, "Wiring iagram". 2. When the engine is started, the should go off. f the remains on, the on board diagnostic system has detected an engine system malfunction. : BR ST SYST UT The on board diagnostic system has the following two functions. SB1315ZZ iagnostic Test ode Y and. Status unction xplanation of unction ode gnition switch in position BUB This function checks the bulb for damage (blown, open circuit, etc.). f the does not come on, check circuit. ngine stopped ngine running UT WR This is a usual driving condition. When a malfunction is detected twice in two consecutive driving cycles (two trip detection logic), the will light up to inform the driver that a malfunction has been detected. The following malfunctions will light up the in the 1st trip. ne trip detection diagnoses ode gnition switch in position S-ST RSUTS This function allows Ts and 1st trip Ts to be read. ngine stopped ngine running T XY SSR 1 TR This function allows the fuel mixture condition (lean or rich), monitored by heated oxygen sensor 1, to be read. ST TST BUB n this mode, the on the instrument panel should stay. f it remains, check circuit. Refer to -165, "Wiring iagram". ST TST UT WR -26

27 BR ST (B) SYST ondition When the malfunction is detected or the 's U is malfunctioning. o malfunction. ST TST S-ST RSUTS n this mode, the T and 1st trip T are indicated by the number of blinks of the as shown below. The T and 1st trip T are displayed at the same time. f the does not illuminate in diagnostic test mode (alfunction warning), all displayed items are 1st trip Ts. f only one code is displayed when the illuminates in diagnostic test mode (S-ST RSUTS), it is a T; if two or more codes are displayed, they may be either Ts or 1st trip Ts. T o. is same as that of 1st trip T. These unidentified codes can be identified by using the SUT or ST. T will be used as an example for how to read a code. B3905 particular trouble code can be identified by the number of four-digit numeral flashes. The zero is indicated by the number of ten flashes. The length of time the 1,000th-digit numeral flashes on and off is 1.2 seconds consisting of an (0.6-second) - (0.6-second) cycle. The 100th-digit numeral and lower digit numerals consist of a 0.3-second and 0.3-second cycle. change from one digit numeral to another occurs at an interval of 1.0-second. n other words, the later numeral appears on the display 1.3 seconds after the former numeral has disappeared. change from one trouble code to another occurs at an interval of 1.8-second. n this way, all the detected malfunctions are classified by their T numbers. The T 0000 refers to no malfunction. W T RS ST TST (S-ST RSUTS) The T can be erased from the back up memory in the by depressing accelerator pedal. Refer to W to RS ST TST (S-ST RSUTS). f the battery is disconnected, the T will be lost from the backup memory within 24 hours. Be careful not to erase the stored memory before starting trouble diagnoses. iagnostic Test ode eated xygen Sensor 1 onitor n this mode, the displays the condition of the fuel mixture (lean or rich) which is monitored by the heated oxygen sensor 1. uel mixture condition in the exhaust gas ir fuel ratio feedback control condition ean Rich losed loop system *Remains or ny condition pen loop system *: aintains conditions just before switching to open loop. To check the heated oxygen sensor 1 function, start engine in the iagnostic Test ode and warm it up until engine coolant temperature indicator points to the middle of the gauge. -27

28 BR ST (B) SYST ext run engine at about 2,000 rpm for about 2 minutes under no load conditions. Then make sure that the comes more than 5 times within 10 seconds with engine running at 2,000 rpm under no load. S WTUT T f the is in iagnostic Test ode, may flash when engine is running. n this case, check diagnostic test mode. ow to switch the diagnostic test (function) modes, and details of the above functions are described later. Refer to ow to Switch iagnostic Test ode. The following emission-related diagnostic information is cleared when the memory is erased. iagnostic trouble codes 1st trip diagnostic trouble codes reeze frame data 1st trip freeze frame data Test values W T SWT ST TST T: t is better to count the time accurately with a clock. t is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has a malfunction. lways returns to iagnostic Test ode after ignition switch is turned. W to ST ST TST (S-ST RSUTS) 1. onfirm that accelerator pedal is fully released, turn ignition switch and wait 3 seconds. 2. Repeat the following procedure quickly five times within 5 seconds. a. ully depress the accelerator pedal. b. ully release the accelerator pedal. 3. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the starts blinking. 4. ully release the accelerator pedal. has entered to iagnostic Test ode (Self-diagnostic results). T: Wait until the same T (or 1st trip T) appears to confirm all Ts certainly. BB0092 W to ST ST TST (T XY SSR 1 TR) 1. Set the in iagnostic Test ode (Self-diagnostic results). Refer to W to ST ST TST (S-ST RSUTS). 2. Start ngine. has entered to iagnostic Test ode (eated oxygen sensor 1 monitor). W to RS ST TST (S-ST RSUTS) 1. Set in iagnostic Test ode (Self-diagnostic results). Refer to W to ST ST TST (S-ST RSUTS). 2. ully depress the accelerator pedal and keep it for more than 10 seconds. The emission-related diagnostic information has been erased from the backup memory in the. 3. ully release the accelerator pedal, and confirm the T 0000 is displayed. -28

29 TRUB SS Trouble iagnosis ntroduction TRUB SS TRUT The engine has an to control major systems such as fuel control, ignition control, idle air control system, etc. The accepts input signals from sensors and instantly drives actuators. t is essential that both input and output signals are proper and stable. t the same time, it is important that there are no malfunctions such as vacuum leaks, fouled spark plugs, or other malfunctions with the engine. : t is much more difficult to diagnose an incident that occurs intermittently rather than continuously. ost intermittent incidents are caused by poor electric connections or improper wiring. n this case, careful checking of suspected circuits may help prevent the replacement of good parts. S233 visual check only may not find the cause of the incidents. road test with SUT or a circuit tester connected should be performed. ollow the Work low below. Before undertaking actual checks, take a few minutes to talk with a customer who approaches with a driveability complaint. The customer can supply good information about such incidents, especially intermittent ones. ind out what symptoms are present and under what conditions they occur. iagnostic Worksheet like the example on Worksheet Sample should be used. Start your diagnosis by looking for conventional malfunctions first. This will help troubleshoot driveability malfunctions on an electronically controlled engine vehicle. WR W S234-29

30 verall Sequence TRUB SS etailed low SB1228B 1.T RT R SYT et the detailed information from the customer about the symptom (the condition and the environment when the incident/malfunction occurred) using the ST WRST. >> T

31 2. T* 1 TRUB SS 1. heck T* erform the following procedure if T* 1 is displayed. - Record T* 1 and freeze frame data* 2. (rint them out with SUT.) - rase T* 1. (Refer to W T RS S-RT ST RT in - 23, "mission-related iagnostic nformation".) - Study the relationship between the cause detected by T* 1 and the symptom described by the customer. (Symptom atrix hart is useful. Refer to -35, "Symptom atrix hart".) 3. heck related service bulletins for information. s any symptom described and any T detected? Symptom is described, T* 1 is displayed>> T 3. Symptom is described, T* 1 is not displayed>> T 4. Symptom is not described, T* 1 is displayed>> T 5. 3.R T SYT Try to confirm the symptom described by the customer (except ). SS WRST is useful to verify the incident. onnect SUT to the vehicle and check diagnosis results. Verify relation between the symptom and the condition when the symptom is detected. >> T 5. 4.R T SYT Try to confirm the symptom described by the customer. SS WRST is useful to verify the incident. onnect SUT to the vehicle and check diagnosis results. Verify relation between the symptom and the condition when the symptom is detected. >> T 6. 5.RR T RT RUR erform T onfirmation rocedure for the displayed T* 1, and then make sure that T* 1 is detected again. f two or more Ts* 1 are detected, refer to -33, "T nspection riority hart" and determine trouble diagnosis order. T: reeze frame data* 2 is useful if the T* 1 is not detected. erform verall unction heck if T onfirmation rocedure is not included on Service anual. This simplified check procedure is an effective alternative though T* 1 cannot be detected during this check. f the result of verall unction heck is, it is the same as the detection of T* 1 by T onfirmation rocedure. s T* 1 detected? Yes >> T 10. o >> heck according to -64, "iagnosis rocedure". 6.RR BS ST erform -17, "Basic nspection". With SUT>> T 7. Without SUT>> T 9. 7.RR S T TR With SUT -31

32 TRUB SS ake sure that S / S-B1, B/U S and / -B1 are within the S value using S in T TR mode with SUT. Refer to -56, "nspection rocedure". re they within the S value? Yes >> T 9. o >> T 8. 8.TT UT RT BY TRUB SS - ST VU etect malfunctioning part according to -57, "iagnosis rocedure". s malfunctioning part detected? Yes >> T 11. o >> T 9. 9.TT UT SYST BY SYT TRX RT etect malfunctioning system according to -35, "Symptom atrix hart" based on the confirmed symptom in step 4, and determine the trouble diagnosis order based on possible causes and symptom. >> T TT UT RT nspect the system. s malfunctioning part detected? Yes >> T 11. o >> onitor input data from related sensors using SUT (Refer to -54, "SUT Reference Value in ata onitor ode".), or check voltage of related terminals (Refer to -45, " Terminal and Reference Value".). 11.RR R R T UT RT 1. Repair or replace the malfunctioning part. 2. Reconnect parts or connectors after repair and replacement. 3. heck T. f T is displayed, erase it. Refer to W T RS S-RT S- T RT in -23, "mission-related iagnostic nformation". >> T When T was detected in step 2, perform T onfirmation rocedure or verall unction heck again, and then make sure that the malfunction have been repaired securely. When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and make sure that the symptom is not detected. (T* 1 is detected)>> T 10. (Symptom remains)>> T 6. >> 1. Before returning the vehicle to the customer, make sure to erase unnecessary T* 1 in (Refer to W T RS S-RT ST RT in -23, "mission-related iagnostic nformation"). 2. ST *1: nclude 1st trip T. *2: nclude 1st trip freeze frame data. ST WRST escription -32