Note PIDs for the following parts are not available on this model. Go to the appropriate part inspection page. CMP sensor Main relay

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Oscar Harrington
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1 PCM INSPECTION [L8, LF, L5] Using M-MDS id Note PIDs for the following parts are not available on this model. Go to the appropriate part inspection page. CMP sensor Main relay 1. Connect the M-MDS to the DLC Switch the ignition to ON. 3. Measure the PID value. If PID value is not within the specification, follow the instructions in Action column. Note The PID/DATA MONITOR function monitors the calculated value of the input/output signals in the PCM. Therefore, an output device malfunction is not directly indicated as a DLC-2 malfunction of the monitored value for the am6zzw output device. If a monitored value of an output device is out of specification, inspect the monitored value of the input device related to the output. For input/output signals except those of the monitoring items, use a voltmeter to measure the PCM terminal voltage. The simulation items that are used in the ENGINE CONTROL SYSTEM OPERATION INSPECTION are as follows. ACCS, ALTF, ARPMDES, EAPCP, FAN1, FAN2, FAN3, FP, HTR11, HTR12, IAS, IMRC, IMT, INJ1~4, SEGRP, TEST, T DUTY1 wt PID/DATA monitor table (reference) Monitor item Unit/ (Definition) Condition AC_REQ (A/C request signal) ACCS (A/C relay) AFR (Target air-fuel ratio) AFR_ACT (Actual air-fuel ratio) ALTF (Generator field coil duty value) ALTT (Generator output voltage) APP 1 (Accelerator pedal position sensor 1) Condition/Specification (Reference) A/C switch ON: ON A/C switch OFF: OFF A/C relay ON: ON A/C relay OFF: OFF Target air-fuel ratio is displayed A/F sensor Actual air-fuel ratio is displayed A/F sensor Just after A/C switch ON and fan switch ON at idle: Duty value rises Switch the ignition to ON: Idle: 14 *1 (E/L not ) Accelerator pedal released: 15 Accelerator pedal depressed: 80 Accelerator pedal released: 0.8 Accelerator pedal depressed: 4. Inspection item Refrigerant pressure switch (low, high), A/C switch A/C relay Inspect following PIDs: RPM, TP REL, ECT. Generator Inspect following PIDs: IAT, ECT, RPM, PWR, ALTT. Generator APP sensor PCM terminal 1AW 1I 2Z 2AC 2AD 2Z 2AC 2AD 2AA 2AF 1AO

2 Monitor item (Definition) APP 2 (Accelerator pedal position sensor 2) ARPMDES (Target engine speed) BOO (Brake switch) BPA *10 (Brake pressure applied switch) CATT11_DSD (Desired catalyst temperature bank one, sensor one) CHRGLP (Generator warning light) COLP *2 (Refrigerant pressure switch (middle)) CPP* 5 (Clutch pedal position) CPP/PNP* 5 (Shift lever position) ECT (Engine coolant temperature) EQ_RAT11 (Equivalence ratio (lambda)) EQ_RAT11_DSD (Desired equivalence ratio (lambda)) ETC_ACT (Electronic throttle actual) ETC_DSD (Electronic throttle desired) EAPCP (Purge solenoid valve duty value) FAN1 (Cooling fan ) FAN2 *6 (Cooling fan ) Unit/ Condition RPM C Condition/Specification (Reference) Accelerator pedal released: 7.5 Accelerator pedal depressed: 42 Accelerator pedal released: 0.4 Accelerator pedal depressed: 2. Indicate the target engine speed Brake pedal depressed: ON Brake pedal released: OFF Brake pedal depressed: ON Brake pedal released: OFF Indicate the estimated catalytic converter temperature Switch the ignition to ON: ON Idle: OFF APP sensor Inspection item CKP sensor Inspect following PIDs: IAT, RPM, MAP, ECT, MAF, TP REL, INGEAR, ALTT. Brake switch Brake switch (See DTC TABLE [L8, LF, L5]) Refrigerant pressure switch (middle) ON *3 at idle: ON Refrigerant pressure switch (middle) OFF *4 at idle: OFF Refrigerant pressure switch (middle) Clutch pedal depressed: ON Clutch pedal released: OFF CPP switch Neutral position: ON Others: OFF Neutral switch C F Indicate the ECT ECT 20 C {68 F}: ECT sensor ECT 80 C {176 F}: Idling after warm-up: 1 Idling after warm-up: 1 Indicate the desired TP by angle Indicate the desired TP by percent TP sensor Indicate the desired TP by angle Inspect following PIDs:APP1, APP2, ETC_ACT. Switch the ignition to ON: 0 Idle: 0 ECT below 100 C {212 F}: OFF Others: ON ECT below 108 C {226 F}: OFF A/C, refrigerant pressure switch (middle) is OFF, and ECT below 108 C {226 F}: OFF Others: ON Inspect following PIDs: IAT, RPM, ECT, MAF, O2S11, INGEAR, PWR. Cooling fan relay Inspect following PIDs: RPM, TP REL, ECT, COLP, TEST. Cooling fan relay Inspect following PIDs: RPM, TP REL, ECT, COLP, TEST. PCM terminal 1AP 1AB 1AF 1AX 1BD 1BC 2AH 2Z 2AC 2AD 2Z 2AC 2AD 2BE, 2BF 2C 1U 1R

3 Monitor item (Definition) FAN3 *7 (Cooling fan ) FP (Fuel pump relay) FUELPW (Fuel injector duration) FUELSYS (Fuel system status) HTR11 (A/F sensor heater) HTR12 (HO2S heater) IAS* 8 (ariable air duct solenoid valve) IAT (Intake air temperature) IMRC (ariable tumble solenoid valve) IMT* 9 (ariable Intake air solenoid valve) INGEAR (Load/no load condition) IS (CTP condition) KNOCKR (Knocking retard) LOAD (Engine load) LONGFT1 (long term fuel trim) MAF (Mass airflow) MAP (Manifold absolute pressure) MIL (Malfunction indicator lamp) MIL_DIS (Travelled distance since the MIL illuminated) Unit/ Condition sec OL/CL/CL- Fault/OL- Fault/OL- Drive Condition/Specification (Reference) ECT below 100 C {212 F}: OFF A/C, refrigerant pressure switch (middle) is ON, and ECT below 108 C {226 F}: OFF Other: ON Switch the ignition to ON: OFF Idle: ON Cranking: ON Idle (after warm up): approx. 1.6 ms Idle (after warm up): CL Idle (after warm up): ON OFF Idle (after warm up): ON OFF ECT is above 70 C {158 F}, engine speed is above 5,800 rpm, and TP opening angle is above 50: ON Others: OFF C F Indicate the IAT. IAT 20 C {68 F}: 2.38 IAT 60 C {140 F}: approx Idle/Off_Idle Engine speed is below approx. 3,750 rpm and ECT is below 63 C {145 F} : On Others: Off Engine speed is below approx. 4,600 (LF)/4,300(L5) rpm: On Others: Off CPP or CPP/PNP is ON: Off Others: On CTP: Idle Others: Off Idle Switch the ignition to ON: 0 Idle: 0 Switch the ignition to ON: 0 Idle (after warm up): approx.15 Inspection item Cooling fan relay Inspect following PIDs: RPM, TP REL, ECT, COLP, TEST. Fuel pump relay Inspect following PIDs: RPM. Fuel injector Inspect following PIDs: IAT, MAF, TP REL, MAP, ECT, RPM, O2S11, O2S12, INGEAR, PWR, ALTT. Fuel injector Inspect following PIDs: IAT, MAF, TP REL, MAP, ECT, RPM, O2S11, O2S12, INGEAR, PWR, ALTT. Inspect following PIDs: IAT, MAF, TP REL, ECT, RPM. Inspect following PIDs: IAT, MAF, ECT, RPM. AD solenoid valve Inspect following PIDs: ECT, RPM, TP REL. IAT sensor ariable tumble solenoid valve Inspect following PIDs: TP REL, ECT, RPM. ariable intake air solenoid valve Inspect following PIDs: RPM. KS PCM terminal 1 1BG 2AZ 2BB 2BC 2BD 2A 2B 1K 1AT 2I 2J 1BC, IBD 2U 2 MAF sensor Idle (after warm up): 1520 g/s Indicate the MAF Switch the ignition to ON: approx. 0.7 MAF sensor Idle (after warm up): approx. 1.2 kpa, psi, Bar Indicate the MAP Switch the ignition to ON (at sea level): approx. 4.1 MAP sensor Idle: approx. 1.2 DTC stored: On DTC not stored: Off km miles Indicate the travelled distance since the MIL illuminated 1AK 2AG

4 Monitor item (Definition) O2S11 (A/F sensor) O2S12 (HO2S) RO2FT1 (HO2S fuel trim) RPM (Engine speed) SCCS *10 (Speed command switch) SEGRP (EGR valve (stepping motor) position) SEGRP DSD (Desired EGR valve position) SHRTFT1 (Short term fuel trim) SPARKAD (Ignition timing) TEST (Test mode) TP REL (Relative throttle position) TP 1 (TP) TP 2 (TP) TPCT (TP sensor voltage at CTP) PWR (Battery positive voltage) SS (ehicle speed) Unit/ Condition Condition/Specification (Reference) A Idle (After warm up): approx. 0 ma A/F sensor Inspection item PCM terminal 2Z 2AC 2AD Idle (After warm up): 01. HO2S 2Q Idle (after warm up): approx RPM Indicate the engine speed CKP sensor 2W ON/OFF switch pressed in (OFF): approx. CANSEL switch pressed in: approx. 1.3 SET(-) switch pressed in: approx. 2.4 SET(+) switch pressed in: approx. 3.2 RESUME switch pressed in: approx. 3.9 ON/OFF switch pressed in (ON): approx. 4.3 Switch the ignition to ON: 0 Idle: 0 step Cranking: 052 Indicate the desired EGR valve position Idle (after warm up): approx Indicate the ignition timing Test mode ON: On Test mode OFF: Off Accelerator pedal released: 3 Accelerator pedal depressed: 75 Accelerator pedal released: approx. 12 Accelerator pedal depressed: approx. 84 Accelerator pedal released: 0.6 Accelerator pedal depressed: 4.2 Accelerator pedal released: approx. 12 Accelerator pedal depressed: approx. 84 Accelerator pedal released: 4.4 Accelerator pedal depressed: 0.8 Inspect cruise switch. EGR valve Inspect following PIDs: MAF, TP REL, ECT, RPM, SS. Inspect following PIDs: MAF, TP REL, ECT, RPM, SS. Inspect following PIDs: MAF, TP REL, ECT, RPM, INGEAR, PWR. 2AT, 2AX, 2AW, 2BA 2G, 2H, 2K, 2L TP sensor TP sensor TP sensor 0.5 TP sensor Switch the ignition to ON: B+ Battery 1C KPH Indicate the vehicle speed 2AK 2AL 2AK 2AL

5 Monitor item (Definition) T ACT1 *9 (Actual valve timing) T DIFF1 *9 (Difference between target and actual valve timing) T DUTY1 *9 (Oil valve duty value) Unit/ Condition Condition/Specification (Reference) Idle: 0 Racing after warm up: 030 (LF), 0 25 (L5) Idle: 0 Idle: 11.5 Inspection item OC Inspect following PIDs: TP REL, ECT, RPM. OC Inspect following PIDs: TP REL, ECT, RPM. OC Inspect following PIDs: TP REL, ECT, RPM. PCM terminal 2E 2E 2E * 1 : Calculated value; differs from terminal voltage * 2 : ehicles equipped with refrigerant pressure switch (middle) * 3 : Refrigerant pressure switch (middle) turns on when the refrigerant pressure is MPa { kgf/ cm 2, psi} * 4 : Refrigerant pressure switch (middle) turns off when the refrigerant pressure is MPa { kgf/ cm 2, psi} * 5 : MTX * 6 : ehicles equipped with three or four cooling fan relays * 7 : ehicles equipped with two or four cooling fan relays * 8 : L5 * 9 : LF, L5 * 10 : ehicles equipped with cruise switch Following PIDs are for the ATX models. If inspects for following PIDs, (See PID/DATA MONITOR INSPECTION [FS5A-EL].) Without Using the SST Caution The PCM terminal voltages vary with change in measuring conditions and vehicle conditions. Always carry out a total inspection of the input systems, output systems, and PCM to determine the cause of trouble. Otherwise, a wrong diagnosis will be made. 1. Measure the voltage at each terminal. If any incorrect voltage is detected, inspect the related system(s), wiring harnesses and connector(s) referring to the Action column in the terminal voltage table. Terminal voltage table (Reference) PCM HARNESS SIDE CONNECTOR 2BE 2BA2AW2AS2AO2AK2AG2AC 2Y 2U 2Q 2M 2I 2E 2A 2BF 2BB 2AX 2AT 2AP 2AL 2AH2AD 2Z 2 2R 2N 2J 2F 2B 2BG2BC 2AY 2AU2AQ2AM 2AI 2AE 2AA 2W 2S 2O 2G 2C 2K 2BH2BD2AZ 2A 2AR2AN 2AJ 2AF2AB 2X 2T 2P 2L 2H 2D 1BE 1BA1AW1AS1AO1AK 1AG 1AC 1Y 1U 1Q 1M 1I 1E 1A 1BF 1BB 1AX 1AT 1AP 1AL 1AH1AD 1Z 1 1R 1N 1J 1F 1B 1BG1BC 1AY 1AU1AQ1AM 1AI 1AE 1AA 1W 1S 1O 1K 1G 1C 1BH1BD 1AZ 1A 1AR1AN 1AJ 1AF 1AB 1X 1T 1P 1L 1H 1D am6zzw oltage Terminal Signal Connected to Test condition inspection item () Switch the ignition to off 1A Power supply Main relay Switch the ignition to ON B+

6 Terminal Signal Connected to Test condition oltage () inspection item 1B Power supply Main relay Switch the ignition to off Switch the ignition to ON B+ 1C Back-up power Battery Battery Under any condition B+ supply (positive terminal) 1D 1E GND Ground Under any condition 1F GND Ground Under any condition 1G GND Ground Under any condition 1H 1I A/C A/C relay A/C A/C relay A/C not B+ 1J Engine speed below 5,800 B+ 1K* 1 AD AD solenoid Idle after warm rpm AD solenoid valve valve up Engine speed above 5,800 rpm 1L 1M 1N 1O 1P MAF sensor GND MAF/IAT sensor Under any condition 1Q Main relay Main relay Switch the ignition to off B+ Main relay Switch the ignition to ON 1R* 2 Cooling fan Cooling fan relay No.2 or Cooling fan Cooling fan relay Idle No.3 (Transfer) No.2 and No.3 Cooling fan not B+ 1S 1T 1U Cooling fan Cooling fan Cooling fan relay Cooling fan relay NO.1 Idling (Main) No.1 Cooling fan not B+ 1* 3 Cooling fan relaly Cooling fan Cooling fan No.2 (Add) Cooling fan relay, Cooling Idling fan relay No.4 *5 Cooling fan not B+ 1W Constant voltage APP sensor Switch the ignition to ON (ref) 5.0 1X 1Y 1Z 1AA 1AB Brake1 Brake switch No.1 Brake pedal depressed B+ Brake switch No.1 Brake pedal released 1AC 1AD 1AE 1AF* 6 Brake2 Brake switch No.2 Brake pedal depressed B+ Brake switch No.2 Brake pedal released 1AG 1AH 1AI CAN ( ) Instrument cluster, ABS/TCS HU/CM, TCM Because this terminal is for CAN, good/no good judgment by terminal voltage is not possible. 1AJ

7 Terminal Signal Connected to Test condition 1AK MAF MAF/IAT sensor 1AL Constant voltage (ref) 1AM CAN (+) Cruise switch ground APP sensor Instrument cluster, ABS HU/CM, TCM Cruise switch Switch the ignition to ON Idle (after warm up) Switch the ignition to ON Because this terminal is for CAN, good/no good judgment by terminal voltage is not possible. oltage () inspection item 0.7 MAF sensor AN* 6 Under any condition Accelerator pedal released 0.8 APP sensor No.1 1AO APP sensor 1 APP sensor IG SW ON Accelerator pedal 4.0 depressed Accelerator pedal released 0.4 APP sensor No.2 1AP APP sensor 2 APP sensor IG SW ON Accelerator pedal 2.0 depressed ON/OFF switch pressed in 0 (OFF) CANCEL switch pressed in 1.3 1AQ *6 SET (-) switch Cruise switch Cruise Cruise pressed in 2.4 IG SW ON Related wiring switch switch SET (+) switch harnesses pressed in 3.2 RESUME switch pressed 3.9 in ON/OFF switch pressed in (ON) 4.3 1AR IAT sensor GND MAF/IAT sensor Under any condition 1AS APP sensor GND APP sensor Under any condition IAT 20 C 1AT IAT MAF/IAT sensor IG SW ON {68 F} 2.38 IAT sensor IAT 60 C {140 F} AU 1A APP sensor GND APP sensor Under any condition Refrigerant A/C A/C switch pvessure switch Refrigerant pressure 1AW A/C Idle A/C not (low, high), A/C B+ switch (Low, high) switch 1AX *7 A/C compressor load Refrigerant pressure switch (middle) A/C ON Refrigerant pressure is above 1.52 MPa {15.5 kgf/ cm 2, 220 psi} Refrigerant pressure is below 1.23 MPa {12.5 kgf/cm 2, 178 psi} B+ Refrigerant pressure switch (middle) Ignition switch 1AY Ignition switch (IG1) *8 Switch the ignition to off Ignition switch *8,, Ignition relay *9 Switch the ignition to ON B+ Ignition relay *9 1AZ

8 Terminal Signal Connected to Test condition oltage () inspection item 1BA Clutch pedal is not 1BB Starter relay Starter relay depressed *10, Shift position is not P or N range *12 Starter relay Clutch pedal is depressed *10, 4 or Shift position is P or N range *12 more 1BC* 10 Neutral position Neutral switch Shift lever is at neutral position Neutral switch Shift lever is not at neutral position B+ 1BD* 10 Clutch operation CPP switch Clutch pedal depressed CPP switch Clutch pedal released B+ 1BE GND Ground Under any condition 1BF 1BG Fuel pump Fuel pump relay Switch the ignition to ON B+ Fuel pump relay Cranking Idle 1BH 2A 2B 2C A/F sensor heater HO2S heater Purge A/F sensor heater HO2S heater Purge solenoid valve A/F sensor heater HO2S heater Purge solenoid valve 2D 2E* 11 OC OC OC 2F 2G 2H 2I IGT1 IGT4 ariable tumble 2J* 11 ariable intake air 2K 2L IGT2 IGT3 Ignition coil (No.1 cylinder) Ignition coil (No.4 cylinder) ariable tumble solenoid valve ariable intake air solenoid valve Ignition coil (No.2 cylinder) Ignition coil (No.3 cylinder) ECT above 63 C {145 F} while idling. ECT below 63 C {145 F} and engine speed below 3,750 rpm Engine speed: above 4,600(LF)/ 4,300(L5) rpm Engine speed: below 4,600(LF)/ 4,300(L5) rpm Ignition coil Ignition coil B+ ariable tumble solenoid valve B+ ariable intake air solenoid valve Ignition coil Ignition coil 2M 2N 2O Sensor GND HO2S Under any condition 2P 2Q HO2S HO2S Idle (after warm up) HO2S 2R 2S CMP signal CMP sensor CMP sensor 2T

9 Terminal Signal Connected to Test condition 2U Knocking (+) KS 2 Knocking ( ) KS 2W CKP signal CKP sensor Switch the ignition to ON (Use digital type voltmeter, because measurement voltage will be detected less than true voltage when using analog type voltmeter) Switch the ignition to ON (Use digital type voltmeter, because measurement voltage will be detected less than true voltage when using analog type voltmeter) oltage () 4.0 inspection item KS KS CKP sensor A/F sensor, HO2S, 2X Sensor shield Under any condition KS 2Y Switch the ignition to ON 5.60 A/F sensor 2Z A/F sensor A/F sensor Switch the ignition to off Idle (after warm up) AA Generator field coil Generator (terminal D) Generator 2AB 2AC A/F sensor A/F sensor Idle (after warm up): 0 ma A/F sensor 2AD A/F sensor A/F sensor erify that the voltage increases when the A/F sensor engine speed increases. 2AE 2AF Generator output Generator Generator voltage (terminal P) 2AG MAP MAP sensor Switch the ignition to ON 4.1 MAP sensor Idle 1.2 ECT 20 C AH ECT ECT sensor Switch the {68 F} 3.14 ECT sensor ignition to ON ECT 80 C 0.76 {176 F} AI 2AJ Accelerator 2AK TP (No. 1) TP sensor No. 1 Switch the pedal released 0.6 TP sensor No.1 ignition to ON Accelerator pedal depressed 4.2 Accelerator pedal released 4.4 Switch the TP sensor No.2 2AL TP (No. 2) TP sensor No. 2 Accelerator ignition to ON pedal 0.8 depressed Switch the ignition to ON B+ 2AM CMP power CMP sensor Switch the ignition to off (after 10 s) 2AN Constant voltage 2AO TP sensor Switch the ignition to ON (ref) 5.0 2AP TP sensor GND TP sensor Under any condition

10 Terminal Signal Connected to Test condition oltage () inspection item 2AQ CKP power CKP sensor Switch the ignition to ON B+ Switch the ignition to off 2AR 2AS 2AT EGR valve #3 coil EGR valve EGR valve Idle B+ (terminal B) 2AU Constant voltage MAP sensor Switch the ignition to ON (ref) 5.0 2A 2AW EGR valve #4 coil EGR valve EGR valve Idle (terminal F) 2AX EGR valve #1 coil EGR valve EGR valve Idle (terminal E) 2AY Sensor GND ECT sensor, MAP sensor Under any condition 2AZ Fuel injection (#4) Fuel injector No.4 Fuel injector No.4 2BA EGR valve #2 coil EGR valve (terminal A) 2BB Fuel injection (#1) Fuel injector No.1 2BC Fuel injection (#2) Fuel injector No.2 2BD Fuel injection (#3) Fuel injector No.3 Idle B+ EGR valve Fuel injector No.1 Fuel injector No.2 Fuel injector No.3 2BE Throttle valve Throttle valve actuator Throttle body Switch the ignition to ON B+ actuator (+) 2BF Throttle valve Throttle valve actuator Throttle body Idle (after warm up) actuator ( ) 2BG 2BH *1 : L5 *2 : ehicles equipped with three or four cooling fan relays *3 : ehicles equipped with two or four cooling fan relays *4 : ehicles equipped with two cooling fan relays *5 : ehicles equipped with four cooling fan relays *6 : ehicles equipped with cruise switch *7 : ehicles equipped with refrigerant pressure switch (middle) *8 : Without advanced keyless entry and push button start system *9 : With advanced keyless entry and push button start system *10 : MTX *11 : LF, L5 *12 : ATX

11 Inspection Using An Oscilloscope (Reference) Purge signal 2C(+)body ground( ) 1/DI (Y), 20 ms/di (X), DC range ampjjw OC signal 2E(+)body ground( ) 2 /DI (Y), 0.8 ms/di (X), DC range am6zzw CMP sensor signal 2S(+)body ground( ) 1 /DI (Y), 25 ms/di (X), DC range am6zzw CKP sensor signal 2W(+)body ground( ) 1 /DI (Y), 5 ms/di (X), DC range am6zzw

12 Generator field coil signal 2AA(+)body ground( ) 0.5 /DI (Y), 2 ms/di (X), DC range ampjjw Generator output voltage signal 2AF(+)body ground( ) 2 /DI (Y), 2 ms/di (X), DC range ampjjw IGT1, IGT2, IGT3, IGT4 signals IGT1(ignition coil No.1): 2G(+)body ground( ) IGT2(ignition coil No.2): 2K(+)body ground( ) IGT3(ignition coil No.3): 2L(+)body ground( ) IGT4(ignition coil No.4): 2H(+)body ground( ) 1 /DI (Y), 50 ms/di (X), DC range adejjw Fuel injection Fuel Injection No.1: 2BB(+)body ground( ) Fuel Injection No.2: 2BC(+)body ground( ) Fuel Injection No.3: 2BD(+)body ground( ) Fuel Injection No.4: 2AZ(+)body ground( ) 1/DI (Y), 25 ms/di (X), DC range 0 am3zzw

13 HO2S heater 2B(+)body ground( ) 5 /DI (Y), 1 s/di (X), DC range Idle (immediately after starting the engine) ampjjw A/F sensor heater 2A(+)body ground( ) 5 /DI (Y), 200 ms/di (X), DC range Idle (immediately after starting the engine) ampjjw

RX8 - Workshop Manual - Engine

2004 RX-8 2004 - RX8 - Workshop Manual - Engine PCM INSPECTIONNot Using the WDS or Equivalent Report a problem with this article NOTE: The PCM terminal voltage can vary with conditions when measuring and