STRG ST STRG TR SYST TTS RUT... 3 RUTS... 3 recaution for Supplemental Restraint System (SRS) "R G" and "ST T R-T- SR"...3 Service otice or recautions for S System...3 SYST SRT... 5 T RTS... 5 omponent arts ocation...5 omponent escription...5 S ontrol Unit...6 S otor...6 Torque Sensor...6 Reduction Gear...6 SYST... 7 S SYST...7 S SYST : System escription...7 S SYST : ail-safe...8 S SYST : rotection unction...8 GSS SYST (S TR UT)... 9 SUT unction...9 U GSS RT...11 S TR UT...11 Reference Value...11 ail-safe...12 rotection unction...12 T nspection riority hart...12 T ndex...13 WRG GR...14 TRY TR WR STRG SYST...14 Wiring iagram...14 S ST...15 GSS RR WRW...15 Work low...15 iagnostic Work Sheet...16 T/RUT GSS...18 1601 TTRY WR SUY...18 T ogic...18 iagnosis rocedure...18 1604 TRQU SSR...20 T ogic...20 iagnosis rocedure...20 1606 S TR...21 T ogic...21 iagnosis rocedure...21 1607, 1608 S TR UT...22 T ogic...22 iagnosis rocedure...22 1609 V S SG...23 T ogic...23 iagnosis rocedure...23 U1000 RUT...24 escription...24 T ogic...24 iagnosis rocedure...24 S WRG...25 omponent unction heck...25 iagnosis rocedure...25 SYT GSS...26 S WRG S T TUR...26 escription...26-1
iagnosis rocedure... 26 S WRG S T TUR... 27 escription... 27 iagnosis rocedure... 27 STRG W TURG R S VY R GT... 28 escription... 28 iagnosis rocedure... 28 U STRG W TURG R RTUR TW RGT T... 29 escription... 29 iagnosis rocedure... 29 U STRG W TURG R (TRQU VRT)... 30 escription... 30 iagnosis rocedure... 30 RV STT... 31 S TR UT... 31 Removal and nstallation... 31-2
< RUT > RUT RUTS RUTS recaution for Supplemental Restraint System (SRS) "R G" and "ST T R-TSR" :0000000007579103 The Supplemental Restraint System such as R G and ST T 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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. nformation necessary to service the system safely is included in the SRS R G and ST T of this Service anual. WRG: lways observe the following items for preventing accidental activation. To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision that 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 ag odule, see SRS R G. ever 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 USG WR TS (R R TR) RS WRG: lways observe the following items for preventing accidental activation. When working near the ir ag iagnosis Sensor Unit or other ir ag System sensors with the ignition or engine running, never 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 ignition, disconnect the battery, and wait at least 3 minutes before performing any service. Service otice or recautions for S System :0000000007579104 heck the following item when performing the trouble diagnosis. - heck any possible causes by interviewing the symptom and it s condition from the customer if any malfunction, such as S warning lamp is turned, occurs. - heck if air pressure and size of tires are proper, the specified part is used for the steering wheel, and control unit is genuine part. - heck if the connection of steering column assembly and steering gear assembly is proper (there is not looseness of mounting bolts, damage of rods, boots or sealants, and leakage of grease, etc). - heck if the wheel alignment is adjusted properly. - heck if there is any damage or modification to suspension or body resulting in increased weight or altered ground clearance. - heck if installation conditions of each link and suspension are proper. - heck if the battery voltage is proper. - heck connection conditions of each connector are proper. -3
< RUT > RUTS - efore connecting or disconnecting the S control unit harness connector, turn ignition switch and disconnect battery ground cable. ecause battery voltage is applied to S control unit even if ignition switch is turned. S289 - When connecting or disconnecting pin connectors into or from S control unit, take care not to damage pin terminals (bend or break). - When connecting pin connectors, make sure that there are no bends or breaks on S control unit pin terminal. uring quick steering, rasping noise may be heard from around the steering wheel. This is not a malfunction. The noise is an operating noise of the S system under normal conditions. f the rasping noise occurs during slow steering, this may not be an operating noise of the system. n this case, it is necessary to find out the location of the noise and repair, if necessary. S291-4
< SYST SRT > SYST SRT T RTS omponent arts ocation T RTS :0000000007579105 SG0830G 1. ulti display unit * Refer to S-3, "omponent arts ocation". 4. ombination meter Refer to W-5, "TR SYST : omponent arts ocation". *: odels with ntegrated ontrol System omponent escription 2. S actuator and electric unit (control unit) Refer to R-8, "omponent arts ocation" 5. S warning lamp (n combination meter) 3. Refer to -16, "G - TR SYST : omponent arts ocation" 6. S motor 7. S control unit 8. Reduction gear 9. Torque sensor. Steering column assembly :0000000007579106 S control unit omponents parts Reference -6, "S ontrol Unit" S motor -6, "S otor" Torque sensor -6, "Torque Sensor" Reduction gear -6, "Reduction Gear" S warning lamp -7, "S SYST : System escription" -5
< SYST SRT > T RTS omponents parts S actuator and electric unit (control unit) ombination meter ulti display unit * *: odels with ntegrated ontrol System S ontrol Unit Reference Transmits mainly the following signals to S control unit via communication. - ngine status signal Transmits mainly the following signal to S control unit via communication. - Vehicle speed signal Transmits mainly the following signal to S control unit via communication. - Vehicle speed signal Turns the S warning lamp according to the signal from S control unit via communication. Transmits mainly the following signals to S control unit via communication. - mode signal - R mode signal - SRT mode signal :0000000007579107 S control unit performs an arithmetical operation on data, such as steering wheel turning force (sensor signal) from the torque sensor, vehicle speed signal, etc. Then it generates an optimum assist torque signal to the S motor according to the driving condition. S control unit decreases the output signal to S motor while extremely using the power steering function (e.g., full steering) consecutively for protecting S motor and S control unit (verload protection control). n SRT mode, changes the steering assist characteristic to enhance a stable steering feel according to the mode signals from multi display unit via communication. (odels with ntegrated ontrol System) S otor :0000000007579108 S motor provides the assist torque by the control signal from S control unit. Torque Sensor Torque sensor detects the steering torque, and transmit the signal to S control unit. Reduction Gear :0000000007579109 :0000000007579110 Reduction gear increases the assist torque provided from S motor with worm gears, and outputs to the column shaft. -6
< SYST SRT > SYST S SYST S SYST : System escription SYST S control unit performs an arithmetical operation on data, such as steering wheel turning force (sensor signal) from the torque sensor, vehicle speed signal, etc. Then it generates an optimum assist torque signal to the S motor according to the driving condition. n case of an error in the electrical system, the fail-safe function stops output signals to the S motor. Refer to -8, "S SYS- T : ail-safe". S control unit decreases the output signal to S motor while extremely using the power steering function (e.g., full steering) consecutively for protecting S motor and S control unit (verload protection control). Refer to -8, "S SYST : rotection unction". xtensive steering at low speed will cause the S control unit and S motor to heat up, once temperature reaches critical point S control unit will reduce current to reduce heat up. System will recover as temperature lowers (reduced or no assistance). n SRT mode, changes the steering assist characteristic to enhance a stable steering feel according to the mode signals from multi display unit via communication. (odels with ntegrated ontrol System) :0000000007579111 SYST GR SG0832G ulti display unit is applied to models with ntegrated ontrol System. UT/UTUT SG ommunicates the signal from each control unit via communication. SG0833G ontrol unit S actuator and electric unit (control unit) Signal status Transmits mainly the following signals to S control unit via communication. - ngine status signal Transmits mainly the following signals to S control unit via communication. - Vehicle speed signal -7
< SYST SRT > SYST ombination meter ulti display unit * ontrol unit *: odels with ntegrated ontrol System S WRG T Turn when there is a malfunction in S system. f indicates that fail-safe mode is engaged and enters a manual steering state (ontrol turning force steering wheel becomes heavy). lso turns when ignition switch is turned, for purpose of lamp check. Turns after the engine starts, if system is normal. ondition gnition switch. (amp check) ngine running. S system malfunction [ther diagnostic item] UT: S warning lamp also turns due to data reception error, communication error etc. S SYST : ail-safe :0000000007579112 f any malfunction occurs in the system, and control unit detects the malfunction, S warning lamp on combination meter turns to indicate system malfunction. When S warning lamp is, enters into a manual steering state. (ontrol turning force steering wheel becomes heavy.) S SYST : rotection unction Signal status Transmits mainly the following signals to S control unit via communication. - Vehicle speed signal Receives mainly the following signals from S control unit via communication. - S warning lamp signal Transmits mainly the following signals to S control unit via communication. - mode signal - R mode signal - SRT mode signal S warning lamp :0000000007579113 S control unit decreases the output signal to S motor while extremely using the power steering function (e.g., full steering) consecutively for protecting S motor and S control unit (verload protection control). While activating overload protection control, the assist torque gradually decreases, and the steering wheel turning force becomes heavy. The normal assist torque is recovered if the steering wheel is not turned for a while. -8
< SYST SRT > GSS SYST (S TR UT) GSS SYST (S TR UT) SUT unction UT SUT can display each diagnostic item using the diagnostic test modes shown following. :0000000007579114 iagnostic test mode U identification *: The following diagnosis information is erased by erasing. T reeze frame data () U TT isplays the part number stored in the control unit. S-G RSUTS Refer to -13, "T ndex". When RT is displayed on self-diagnosis result. The system is presently malfunctioning. When ST is displayed on self-diagnosis result. System malfunction in the past is detected, but the system is presently normal. RZ R T () The following vehicle status is recorded when T is detected and is displayed on SUT. T TR unction The part number stored in the control unit can be read. Self diagnostic result Self-diagnostic results and freeze frame data can be read and erased quickly. * ata monitor tem name G UTR (0 39) TTRY VT (V) TRQU SSR (m) nput/utput data in the S control unit can be read. isplay item The number of times that ignition switch is turned after the T is detected is displayed. When 0 is displayed: t indicates that the system is presently malfunctioning. When except 0 is displayed: t indicates that system malfunction in the past is detected, but the system is presently normal. T: ach time when ignition switch is turned to, numerical number increases in 1 2 3...38 39. When the operation number of times exceeds 39, the number do not increase and 39 is displayed until selfdiagnosis is erased. onitor item (Unit) Remarks isplays the power supply voltage for S control unit. isplays steering wheel turning force detected by torque sensor. TR URRT () isplays the current value consumed by S motor. *1 TR SG () SSST TRQU (m) /U T ( ) or ( ) SSST V (%) isplays the current commanded value to S motor. isplays assist torque of S motor being output by the electric power steering. isplays the temperature of the S control unit. ormally displays 100%. n case of an excessive stationary steering, the assist curvature gradually falls. owever, it return to 100% when left standing. *2 V S (km/h) or () Vehicle speed is displayed from vehicle speed signal via communication. *3 WRG (n/ff) G STTUS (Stop/Run) STRG (R/SRT) *4 S warning lamp control status is displayed. ngine speed is displayed from engine status signal via communication. isplay the driving mode of ntegrated ontrol System received through communication. -9
GSS SYST (S TR UT) < SYST SRT > *1: lmost in accordance with the value of TR SG. t is not a malfunction though these values are not accorded when steering quickly. *2: ormally displays 100%. n case of an excessive stationary steering, the assist curvature gradually falls. owever, it returns to 100% when left standing. *3: t is not a malfunction, though it might not be corresponding just after ignition switch in turned. *4: isplays R in models without ntegrated ontrol System. -10
< U GSS RT > S TR UT U GSS RT S TR UT Reference Value :0000000007579115 VUS T GSS T UT: The output signal indicates the S control unit calculation data. The normal values will be displayed even in the event that the output circuit (harness) is open. onitor item ondition ata monitor TTRY VT gnition switch: attery voltage TRQU SSR TR URRT TR SG SSST TRQU /U T ngine running ngine running ngine running ngine running gnition switch or engine running Steering wheel: ot steering (There is no steering force) Steering wheel: Right turn Steering wheel: eft turn Steering wheel: ot steering (There is no steering force) Steering wheel: Right or left turn Steering wheel: ot steering (There is no steering force) Steering wheel: Right turn Steering wheel: eft turn Steering wheel: ot steering (There is no steering force) Steering wheel: Right or left turn pprox. 0 m isplay value ositive value (m) egative value (m) pprox. 0 isplays consumption current of S motor () *1 pprox. 0 ositive value () egative value () pprox. 0 m SSST V ngine running 100 % *2 V S WRG G STTUS STRG *4 Vehicle stopped While driving S warning lamp: S warning lamp: ngine not running ngine running ngine running riving mode of ntegrated ontrol System: xcept SRT isplays assist torque of S motor (m) isplays temperature of inside of S control unit [ ( )] 0 km/h (0 mph) pproximately equal to the indication on speedometer *3 (inside of ±10%) riving mode of ntegrated ontrol SRT System: SRT *1: lmost in accordance with the value of TR SG. t is not a malfunction though these values are not accorded when steering quickly. *2: ormally displays 100%. n case of an excessive stationary steering, the assist curvature gradually falls. owever, it returns to 100% when left standing. *3: t is not a malfunction, though it might not be corresponding just after ignition switch in turned. *4: isplays R in models without ntegrated ontrol System. n ff Stop Run R -11
S TR UT < U GSS RT > TR YUT SG0834ZZ YS VUS Terminal o. (Wire olor) ail-safe :0000000007579116 f any malfunction occurs in the system, and control unit detects the malfunction, S warning lamp on combination meter turns to indicate system malfunction. When S warning lamp is, enters into a manual steering state. (ontrol turning force steering wheel becomes heavy.) rotection unction escription + Signal name nput/utput 1 () 2 () 4 (G) 9 (R) 10 () :0000000007579117 S control unit decreases the output signal to S motor while extremely using the power steering function (e.g., full steering) consecutively for protecting S motor and S control unit (verload protection control). While activating overload protection control, the assist torque gradually decreases, and the steering wheel turning force becomes heavy. The normal assist torque is recovered if the steering wheel is not turned for a while. T nspection riority hart ondition Value (pprox.) - nput/utput - nput/utput Ground gnition power supply nput gnition switch: gnition switch: 9 18.2 V 0 V Ground attery power supply nput lways 9 18.2 V Ground Ground lways 0 V :0000000007579118 When multiple Ts are detected simultaneously, check one by one depending on the following priority list. riority 1 U1000 RUT 2 1609 V S SG 3 1601 TTRY WR SUY 4 ther than the above riority order item (T) -12
< U GSS RT > T ndex S TR UT :0000000007579119 T tems (SUT screen terms) Reference 1601 TTRY VT -18, "T ogic" 1604 TRQU SSR -20, "T ogic" 1606 S TR -21, "T ogic" 1607 R -22, "T ogic" 1608 TR UT -22, "T ogic" 1609 V S -23, "T ogic" U1000 RUT -24, "T ogic" -13
TRY TR WR STRG SYST < WRG GR > WRG GR TRY TR WR STRG SYST Wiring iagram :0000000007579120 or connector terminal arrangements, harness layouts, and alphabets in a described in wiring diagram), refer to G-12, "onnector nformation". (option abbreviation; if not GW0280G -14
< S ST > GSS RR WRW S ST GSS RR WRW Work low :0000000007579121 T W 1.TRVW R T USTR larify customer complaints before inspection. irst of all, perform an interview utilizing -16, "iagnostic Work Sheet" and reproduce symptoms as well as fully understand it. sk customer about his/her complaints carefully. heck symptoms by driving vehicle with customer, if necessary. UT: ustomers are not professional. ever guess easily like maybe the customer means that..., or maybe the customer mentions this symptom. >> G T 2. 2. SYT Reproduce the symptom that is indicated by the customer, based on the information from the customer obtained by interview. lso check that the symptom is not caused by protection function. Refer to -12, "rotection unction". UT: When the symptom is caused by normal operation, fully inspect each portion and obtain the understanding of customer that the symptom is not caused by a malfunction. >> G T 3. 3.RR S-GSS erform self-diagnosis. s any T detected? YS >> Record or print T and freeze frame data (). G T 4. >> G T 6. 4.R SYT 1. rase self-diagnostic results for S. 2. erform T confirmation procedures for the error detected system. T: f some Ts are detected at the same time, determine the order for performing the diagnosis based on - 12, "T nspection riority hart". s any T detected? YS >> G T 5. >> heck harness and connectors based on the information obtained by interview. Refer to G-43, "ntermittent ncident". 5.RR R R RRR-TT RTS Repair or replace error-detected parts. Reconnect part or connector after repairing or replacing. When T is detected, erase self-diagnostic results for S. >> G T 7. 6.TY RRR-TT SYST Y SYT GSS stimate error-detected system based on symptom diagnosis and perform inspection. an the error-detected system be identified? -15
< S ST > GSS RR WRW YS >> G T 7. >> heck harness and connectors based on the information obtained by interview. Refer to G-43, "ntermittent ncident". 7. 1. heck the reference value for S control unit. 2. Recheck the symptom and check that symptom is not reproduced on the same conditions. s the symptom reproduced? YS >> G T 3. >> ST iagnostic Work Sheet :0000000007579122 escription n general, customers have their own criteria for a problem. Therefore, it is important to understand the symptom and status well enough by asking the customer about his/her concerns carefully. To systemize all the information for the diagnosis, prepare the interview sheet referring to the interview points. n some cases, multiple conditions that appear simultaneously may cause a T to be detected. nterview sheet sample ustomer name R/S Registration number Vehicle type nterview sheet nitial year registration Storage date ngine ileage km (ile) Symptom V The steering wheel position (center) is in the wrong position. S warning lamp turns on. oise Vibration thers ( ) irst occurrence Recently thers ( ) requency of occurrence lways Under a certain conditions of Sometimes (time(s)/day) limate conditions Road conditions peration conditions, etc. rrelevant Weather ine loud Rain Snow thers ( ) Temperature ot Warm ool old Temperature [pprox. ( )] Relative humidity igh oderate ow Urban area Suburb area igh way ounting road (uphill or down hill) Rough road rrelevant When engine starts uring idling uring driving uring acceleration t constant speed driving uring deceleration uring cornering (right curve or left curve) uring steering -16
< S ST > GSS RR WRW ustomer name R/S Registration number Vehicle type nterview sheet nitial year registration Storage date ngine ileage km (ile) V ther conditions emo -17
1601 TTRY WR SUY < T/RUT GSS > T/RUT GSS 1601 TTRY WR SUY T ogic :0000000007579123 T TT G T isplay item alfunction detected condition ossible cause 1601 TTRY VT T RT RUR 1.RTG When a power supply voltage to the S control unit is maintained at 18.2 V or more or at less than 9 V continuously for five second or more. arness or connector S control unit use ower supply system attery f T RT RUR has been previously conducted, always turn ignition switch and wait at least 10 seconds before conducting the next test. >> G T 2. 2.T RRUT RUR 1. Turn the ignition switch to. 2. erform S self-diagnosis. s T 1601 detected? YS >> roceed to diagnosis procedure. Refer to -18, "iagnosis rocedure". >> ST iagnosis rocedure :0000000007579124 1. S TR UT GRU RUT 1. Turn ignition switch. 2. isconnect S control unit harness connector. 3. heck continuity between S control unit harness connector terminal and ground. onnector S control unit Terminal ontinuity 38 10 Ground xisted 4. onnect S control unit harness connector. YS >> G T 2. >> Repair open circuit or short to ground or short to power in harness or connectors. 2. S TR UT WR SUY RUT (1) 1. heck voltage between S control unit harness connector terminals and ground. onnector S control unit Terminal 2. Turn ignition switch. UT: ever start the engine. Voltage 37 4 Ground pprox. 0 V -18
< T/RUT GSS > 1601 TTRY WR SUY 3. heck voltage between S control unit harness connector and ground. onnector S control unit Terminal Voltage 37 4 Ground 9 18.2 V YS >> G T 4. >> G T 3. 3. S TR UT WR SUY RUT (2) 1. Turn ignition switch. 2. heck the 10 fuse (#3). 3. heck the harness for open or short between S control unit harness connector o.4 terminal and the 10 fuse (#3). YS >> erform the trouble diagnosis for ignition power supply circuit. Refer to G-23, "Wiring iagram - GT WR SUY -". >> Repair or replace error-detected parts. 4. S TR UT WR SUY RUT (3) 1. Turn ignition switch. 2. heck voltage between S control unit harness connector terminals and ground. onnector S control unit Terminal Voltage 38 9 Ground 9 18.2 V 3. Turn ignition switch. UT: ever start the engine. 4. heck voltage between S control unit harness connector and ground. onnector S control unit Terminal Voltage 38 9 Ground 9 18.2 V YS >> G T 6. >> G T 5. 5. S TR UT WR SUY RUT (4) 1. Turn ignition switch. 2. heck the 60 fusible link (). 3. heck the harness for open or short between S control unit harness connector o.9 terminal and the 60 fusible link (). YS >> erform the trouble diagnosis for power supply circuit. Refer to G-11, "Wiring iagram - T- TRY WR SUY -". >> Repair or replace error-detected parts. 6. TRS RSS TRS heck the S control unit pin terminals for damage or loose connection with harness connector. YS >> S control unit is malfunctioning. Replace steering column assembly. Refer to ST-9, "Removal and nstallation". >> Repair or replace error-detected parts. -19
< T/RUT GSS > 1604 TRQU SSR T ogic 1604 TRQU SSR :0000000007579125 T TT G T isplay item alfunction detected condition ossible cause 1604 TRQU SSR When torque sensor output signal is malfunctioning. T RT RUR 1.RTG arness or connector Torque sensor S control unit f T RT RUR has been previously conducted, always turn ignition switch and wait at least 10 seconds before conducting the next test. >> G T 2. 2.T RRUT RUR 1. Turn the ignition switch to. 2. erform S self-diagnosis. s T 1604 detected? YS >> roceed to diagnosis procedure. Refer to -20, "iagnosis rocedure". >> ST iagnosis rocedure :0000000007579126 1. TRS RSS TRS heck S control unit pin terminals for damage or loose connection with harness connector. f any items are damaged, repair or replace error-detected parts. YS >> G T 2. >> Repair or replace error-detected parts. 2.RR S-GSS 1. rase self-diagnostic results for S. 2. Turn the ignition switch, and then wait 10 seconds and more. 3. erform self-diagnosis for S. s T 1604 detected? YS >> Torque sensor is malfunctioning. Replace steering column assembly. Refer to ST-9, "Removal and nstallation". >> heck intermittent incident. Refer to G-43, "ntermittent ncident". -20
< T/RUT GSS > 1606 S TR T ogic 1606 S TR :0000000007579127 T TT G T isplay item alfunction detected condition ossible cause 1606 S TR T RT RUR 1.RTG When the motor driver malfunction of S control unit or S motor malfunction is detected. arness or connector S motor S control unit f T RT RUR has been previously conducted, always turn ignition switch and wait at least 10 seconds before conducting the next test. >> G T 2. 2.T RRUT RUR 1. Turn the ignition switch to. 2. erform S self-diagnosis. s T 1606 detected? YS >> roceed to diagnosis procedure. Refer to -21, "iagnosis rocedure". >> ST iagnosis rocedure :0000000007579128 1.RR S-GSS 1. rase self-diagnostic results for S. 2. Turn the ignition switch, and then wait 10 seconds and more. 3. erform self-diagnosis for S. s T 1606 detected? YS >> S motor is malfunctioning. Replace steering column assembly. Refer to ST-9, "Removal and nstallation". >> heck S control unit pin terminals for damage or loose connection with harness connector. f any items are damaged, repair or replace error-detected parts. -21
1607, 1608 S TR UT < T/RUT GSS > 1607, 1608 S TR UT T ogic :0000000007579129 T TT G T isplay item alfunction detected condition ossible cause 1607 1608 R TR UT T RT RUR 1.RTG When the memory (R) system malfunction is detected in S control unit. When the internal malfunction is detected in S control unit. S control unit f T RT RUR has been previously conducted, always turn ignition switch and wait at least 10 seconds before conducting the next test. >> G T 2. 2.T RRUT RUR 1. Turn the ignition switch to. 2. erform S self-diagnosis. s T 1607 or 1608 detected? YS >> roceed to diagnosis procedure. Refer to -22, "iagnosis rocedure". >> ST iagnosis rocedure :0000000007579130 1. TRS RSS TRS heck S control unit pin terminals for damage or loose connection with harness connector. f any items are damaged, repair or replace error-detected parts. YS >> G T 2. >> Repair or replace error-detected parts. 2.RR S-GSS 1. rase self-diagnostic results for S. 2. Turn the ignition switch, and then wait 10 seconds and more. 3. erform self-diagnosis for S. s T 1607 or 1608 detected? YS >> S control unit is malfunctioning. Replace steering column assembly. Refer to ST-9, "Removal and nstallation". >> heck intermittent incident. Refer to G-43, "ntermittent ncident". -22
< T/RUT GSS > 1609 V S SG T ogic T TT G 1609 V S SG :0000000007579131 T isplay item alfunction detected condition ossible cause 1609 V S T RT RUR 1.RTG f T RT RUR has been previously conducted, always turn ignition switch and wait at least 10 seconds before conducting the next test. >> G T 2. 2.T RRUT RUR 1. Turn the ignition switch to. 2. erform S self-diagnosis. s T 1609 detected? YS >> roceed to diagnosis procedure. Refer to -23, "iagnosis rocedure". >> ST iagnosis rocedure 1.RR S TUTR TR UT (TR UT) S-GSS 1. Turn the ignition switch to. 2. erform S self-diagnosis. s any T detected? YS >> heck the T. >> G T 2. 2.RR S-GSS alfunction is detected in vehicle speed signal that is output from S actuator and electric unit (control unit) via communication. S actuator and electric unit (control unit) input signal error is detected. arness or connector communication line S control unit S malfunction - Vehicle speed signal error :0000000007579132 erform S self-diagnosis. s T 1609 detected? YS >> S control unit is malfunctioning. Replace steering column assembly. Refer to ST-9, "Removal and nstallation". >> heck S control unit pin terminals for damage or loose connection with harness connector. f any item are damaged, repair or replace error-detected parts. -23
< T/RUT GSS > U1000 RUT escription U1000 RUT :0000000007579133 (ontroller rea etwork) is a serial communication line for real time application. t is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. any electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). n communication, control units are connected with 2 communication lines (- line, - line) allowing a high rate of information transmission with less wiring. ach control unit communicate data but selectively reads required data only. T ogic T TT G :0000000007579134 T isplay item alfunction detected condition ossible cause U1000 T RT RUR 1.RTG RUT S control unit is not transmitting/receiving communication signal for 2 seconds or more. communication error S control unit f T RT RUR has been previously conducted, always turn ignition switch and wait at least 10 seconds before conducting the next test. >> G T 2. 2.T RRUT RUR 1. Turn the ignition switch to. 2. erform S self-diagnosis. s T U1000 detected? YS >> roceed to diagnosis procedure. Refer to -24, "iagnosis rocedure". >> ST iagnosis rocedure :0000000007579135 roceed to -15, "Trouble iagnosis low hart". -24
< T/RUT GSS > S WRG omponent unction heck S WRG :0000000007579136 1. T UT T S WRG heck that the S warning lamp turns when ignition switch turns. Then, S warning lamp turns after the engine is started. YS >> ST >> erform trouble diagnosis. Refer to -25, "iagnosis rocedure". iagnosis rocedure 1.RR S-GSS 1. Turn the ignition switch to. 2. erform S self-diagnosis. s any T detected? YS >> heck the T. Refer to -13, "T ndex". >> G T 2. 2. S WRG SG :0000000007579137 1. Turn the ignition switch. UT: ever start the engine. 2. Select T TR of S and select WRG. 3. heck that the S warning lamp is turned. 4. Start the engine. UT: ever drive the vehicle. 5. heck that the S warning lamp is turned. YS >> erform the trouble diagnosis for combination meter power supply circuit. Refer to W-42, "T TR : iagnosis rocedure". >> S control unit is malfunctioning. Replace steering column assembly. Refer to ST-9, "Removal and nstallation". -25
S WRG S T TUR < SYT GSS > SYT GSS S WRG S T TUR escription :0000000007579138 S warning lamp does not turn when turning ignition switch from. (heck the illumination of the S warning lamp.) iagnosis rocedure 1. S WRG :0000000007579139 erform the trouble diagnosis of S warning lamp. Refer to -25, "iagnosis rocedure". YS >> heck that there is no malfunction in each harness connector pin terminal or disconnection. >> Repair or replace the specific malfunctioning part. -26
< SYT GSS > S WRG S T TUR S WRG S T TUR escription S warning lamp does not turn several seconds after engine started. iagnosis rocedure :0000000007579140 :0000000007579141 1.RR S-GSS 1. Turn the ignition switch to. 2. erform S self-diagnosis. s any T detected? YS >> heck the T. Refer to -13, "T ndex". >> G T 2. 2. S WRG erform the trouble diagnosis of S warning lamp. Refer to -25, "iagnosis rocedure". YS >> G T 3. >> Repair or replace the specific malfunctioning part. 3. S TR UT WR SUY GRU RUT erform the trouble diagnosis of S control unit power supply and ground. Refer to -18, "iagnosis rocedure". YS >> heck that there is no malfunction in each harness connector pin terminal or disconnection. >> Repair or replace the specific malfunctioning part. -27
STRG W TURG R S VY R GT < SYT GSS > STRG W TURG R S VY R GT escription :0000000007579142 Steering wheel turning force is heavy or light. iagnosis rocedure :0000000007579143 1. T UT T S WRG heck that the S warning lamp turns when ignition switch turns. Then, S warning lamp turns after the engine is started. YS >> G T 4. >> G T 2. 2.RR S-GSS 1. Turn the ignition switch to. 2. erform S self-diagnosis. s any T detected? YS >> heck the T. Refer to -13, "T ndex". >> G T 3. 3. S TR UT SG 1. Start the engine. UT: ever drive the vehicle. 2. Turn steering wheel from full left stop to full right stop. 3. Select TRQU SSR in T TR in S. onitor item ondition isplay value TRQU SSR Steering wheel: ot steering (There is no steering force) Steering wheel: Right turn Steering wheel: eft turn YS >> G T 5. >> G T 4. 4. S TR pprox. 0 m ositive value (m) egative value (m) erform the trouble diagnosis of S motor. Refer to -21, "iagnosis rocedure". YS >> G T 5. >> Repair or replace the specific malfunctioning part. 5. STRG W TURG R heck the steering wheel turning force. Refer to ST-7, "nspection". YS >> ST >> heck the steering wheel turning force for mechanical malfunction. Refer to ST-17, "nspection". -28
U STRG W TURG R RTUR TW RGT T < SYT GSS > U STRG W TURG R RTUR - TW RGT T escription Unbalance steering wheel turning force and return between right and left. iagnosis rocedure 1. T UT T S WRG heck the S warning lamp while engine is running. oes the S warning lamp turn? YS >> G T 2. >> Refer to -27, "iagnosis rocedure". 2. W GT heck the wheel alignment. Refer to SU-6, "nspection". YS >> G T 3. >> djustment of wheel alignment. Refer to SU-6, "nspection". 3. S TR UT SG 1. Start the engine. UT: ever drive the vehicle. 2. Turn steering wheel from full left stop to full right stop. 3. Select T TR of S and select TRQU SSR. 4. erform the torque sensor inspection. onitor item ondition isplay value TRQU SSR YS >> G T 5. >> G T 4. 4. S TR Steering wheel: ot steering (There is no steering force) Steering wheel: Right turn Steering wheel: eft turn pprox. 0 m ositive value (m) egative value (m) erform the trouble diagnosis of S motor. Refer to -21, "iagnosis rocedure". YS >> G T 5. >> Repair or replace the specific malfunctioning part. 5. STRG W TURG R :0000000007579144 :0000000007579145 heck the steering wheel turning force. Refer to ST-4, "nspection". YS >> ST >> heck the steering wheel turning force for mechanical malfunction. Refer to ST-17, "nspection". -29
U STRG W TURG R (TRQU VRT) < SYT GSS > U STRG W TURG R (TRQU VR- T) escription :0000000007579146 Unbalance steering wheel turning force (torque variation). iagnosis rocedure :0000000007579147 1. T UT T S WRG heck the S warning lamp while engine is running. oes the S warning lamp turn? YS >> G T 2. >> Refer to -27, "iagnosis rocedure". 2. STRG U STRG GR heck the steering column assembly and steering gear assembly. Steering column assembly. Refer to ST-9, "xploded View". Steering gear assembly. Refer to ST-14, "xploded View". YS >> G T 3. >> Repair or replace the specific malfunctioning part. 3. S TR UT SG 1. Start the engine. UT: ever drive the vehicle. 2. Turn steering wheel from full left stop to full right stop. 3. Select T TR of S and select TRQU SSR. 4. erform the torque sensor inspection. onitor item ondition isplay value TRQU SSR YS >> G T 5. >> G T 4. 4. S TR Steering wheel: ot steering (There is no steering force) Steering wheel: Right turn Steering wheel: eft turn pprox. 0 m ositive value (m) egative value (m) erform the trouble diagnosis of S motor. Refer to -21, "iagnosis rocedure". YS >> G T 5. >> Repair or replace the specific malfunctioning part. 5. STRG W TURG R heck the steering wheel turning force. Refer to ST-7, "nspection". YS >> ST >> heck the steering wheel turning force for mechanical malfunction. Refer to ST-17, "nspection". -30
< RV STT > S TR UT RV STT S TR UT Removal and nstallation :0000000007579148 UT: isconnect battery negative terminal before starting operations. ever remove S control unit from steering column assembly. When replacing S control unit, replace steering column assembly. Refer to ST-9, "Removal and nstallation". -31