PCM INSPECTION [L8, LF, L3]

Using SST (WDS or equivalent)

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 SST (WDS or equivalent) to the DLC-2.

2. Turn the ignition switch to ON position.

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 malfunction of the monitored value for the 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 control.

• 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, EVAPCP, FAN1, FAN2, FAN3, FP, HTR11, HTR12, IAC, IASV, IMRC, IMTV, VT DUTY1

PID/DATA monitor table (reference)

Monitor item (Definition)	Unit/Condition		Condition/Specification (Reference)	Action	PCM terminal
AC_REQ (A/C request signal)	ON/OFF		A/C switch and fan switch ON at ignition switch ON: On A/C switch OFF at ignition switch ON: Off	Inspect A/C switch.	1AU
ACCS (A/C relay)	ON/OFF		Ignition switch ON: OFF A/C switch ON and fan switch ON at idle: ON	Inspect following PIDs: RPM, TP, ECT, ACSW, TR. Inspect A/C relay.	1I
ALTF (Generator field coil control duty value)	%		Ignition switch ON: 0% Idle: 0-100% Just after A/C switch ON and fan switch ON at idle: Duty value rises	Inspect following PIDs: IAT, ECT, RPM, VPWR, ALTT V. Inspect generator.	2AI
ALTT V (Generator output voltage)	V		Ignition switch ON: 0 V Idle: Approx. 14.9 V*1 (E/L not operating)	Inspect generator.	2AJ
APP (Accelerator pedal position)	%		APP released: 0% APP open: 100%	Inspect following PIDs: APP1, APP2. Inspect accelerator pedal position sensor.	1AO 1AP
APP 1 (Accelerator pedal position sensor 1)	%		APP released: 31.0-32.4% APP open: 69.8-81.8%	Inspect accelerator pedal position sensor.	1AO
	V		APP released: 1.55-1.62 V APP depressed: 3.49-4.09 V
APP 2 (Accelerator pedal position sensor 2)	%		APP released: 20.2-21.4% APP depressed: 58.8-70.8%	Inspect accelerator pedal position sensor.	1AP
	V		APP released: 1.01-1.07 V APP depressed: 2.94-3.54 V
ARPMDES (Target engine speed)	RPM		L8 No load: 700 rpm E/L operating: 700 rpm P/S operating: 750 rpm A/C ON: 750 rpm LF ATX No load: 700 rpm E/L operating: 700 rpm P/S operating: 700 rpm A/C ON: 750 rpm*2, 700 rpm*3 LF MTX, L3 No load: 650 rpm E/L operating: 700 rpm P/S operating: 700 rpm A/C ON: 750 rpm	Inspect following PIDs: IAT, RPM, MAP, ECT, MAF, TP, INGEAR, ACSW, TR, PSP, ALTT V. Inspect IAC valve. Inspect CKP sensor.	-
B+ (Battery positive voltage)	V		Ignition switch ON: B+	Inspect main relay. Inspect battery.	1BA
BOO (Brake switch)	ON/OFF		Brake pedal depressed: ON Brake pedal released: OFF	Inspect brake switch.	1AB 1AF
BPA (Brake pressure applied switch)	ON/OFF		Brake pedal depressed: ON Brake pedal released: OFF	Inspect brake switch.	-
CATT11_DSD (Desired catalyst temperature bank one, sensor one)	°C		Indicate the estimated catalytic converter temperature	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3])	-
CHRGLP (Generator warning light)	ON/OFF		Ignition switch ON: ON Idle: OFF	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)	-
COLP (Refrigerant pressure switch (middle))	ON/OFF		Refrigerant pressure switch (middle) ON *1 at idle: ON Refrigerant pressure switch (middle) OFF*2 at idle: OFF	Inspect refrigerant pressure switch.	1J
CPP*6 (Clutch pedal position)	ON/OFF		Clutch pedal depressed: ON Clutch pedal released: OFF	Inspect clutch pedal position switch.	1D
CPP/PNP*6 (Shift lever position)	Drive/Neutral		Neutral position: Neutral Others: Drive	Inspect neutral switch.	1X
DTCCNT (Number of DTC detected)	-		-	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)	-
ECT (Engine coolant temperature)	°C	°F	ECT 20 °C {68 °F}: 20 °C {68 °F} ECT 60 °C {140 °F}: 60 °C {140 °F}	Inspect ECT sensor.	2AH
	V		ECT 20 °C {68 °F}: 3.04-3.14 V ECT 60 °C {140 °F}: 1.29-1.39 V
EQ_RAT11 (Equivalence ratio (lambda))	-		Idling after warm-up: Approx. 1	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)	2Z 2AC 2AD
EQ_RAT11_DSD (Desired equivalence ratio (lambda))	-		Idling after warm-up: Approx. 1	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)	2Z 2AC 2AD
ETC_ACT (Electronic throttle control actual)	°		Indicate the desired TP by angle	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)	2AL 2AK
ETC_DSD (Electronic throttle control desired)	%		Indicate the desired TP by percent	Inspect following PIDs:APP1, APP2, ETC_ACT. Inspect TP sensor.	1AO 1AP
	°		Indicate the desired TP by angle
EVAPCP (Purge solenoid valve duty value)	%		Ignition switch ON: 0% Idle: 0%	Inspect following PIDs: IAT, RPM, ECT, MAF, O2S11, INGEAR, TR, VPWR.	2C
FAN1 (Cooling fan control)	ON/OFF		ECT below 100 °C {212 °F}: OFF Others: ON	Inspect following PIDs: RPM, TP, ECT, ACSW, COLP, TEST. Inspect cooling fan relay.	1M
FAN2 (Cooling fan control)	ON/OFF		ECT below 108 °C {226 °F}: OFF A/C operating, refrigerant pressure switch (middle) is OFF, and ECT below 108 °C {226 °F}: OFF Others: ON	Inspect following PIDs: RPM, TP, ECT, ACSW, COLP, TEST. Inspect cooling fan relay.	1R
FAN3 (Cooling fan control)	ON/OFF		ECT below 100 °C {212 °F}: OFF A/C operating, refrigerant pressure switch (middle) is ON, and ECT below 108 °C {226 °F}: OFF Other: ON	Inspect following PIDs: RPM, TP, ECT, ACSW, COLP, TEST. Inspect cooling fan relay.	1R
FP (Fuel pump relay)	ON/OFF		Ignition switch ON: OFF Idle: ON Cranking: ON	Inspect following PIDs: RPM. Inspect fuel pump relay.	1H*7 1Q*8
FUELPW (Fuel injector duration)	ms		Ignition switch ON: 0 ms Idle (after warm up): approx. 2.5 ms	Inspect following PIDs: IAT, MAF, TP, MAP, ECT, RPM, O2S11, O2S12, INGEAR, TR, PSP, ACSW, VPWR, ALTT V. Inspect fuel injector.	2AZ 2BB 2BC 2BD
FUELSYS (Fuel system status)	Open loop/Closed loop		Ignition switch ON: Open loop Idle (after warm up): Closed loop	Inspect following PIDs: IAT, MAF, TP, MAP, ECT, RPM, O2S11, O2S12, INGEAR, TR, PSP, ACSW, VPWR, ALTT V. Inspect fuel injector.	-
GENVDSD (Generator voltage desired)	V		Ignition switch ON: 0 V Idle: Approx. 14.9 V (E/L not operating)	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)	-
HTR11 (A/F sensor heater)	ON/OFF		Idle (after warm up): ON⇔OFF	Inspect following PIDs: IAT, MAF, TP, ECT, RPM, ACSW.	2BG
HTR12 (HO2S heater)	ON/OFF		Ignition switch ON: OFF (HO2S heater not operating) Idle: ON (HO2S heater operating)	Inspect following PIDs: IAT, MAF, ECT, RPM, ACSW.	2BE
IASV*4 (Variable air duct control solenoid valve)	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	Inspect following PIDs: ECT, RPM, TP. Inspect VAD solenoid valve.	1K
IAT (Intake air temperature)	°C	°F	Indicate the IAT.	Inspect IAT sensor.	1AT
	V		IAT 0 °C {32 °F}: Approx. 3.43 V IAT 20 °C {68 °F}: Approx. 2.38 V IAT 40 °C {104 °F}: Approx. 1.49 V
IMRC (Variable tumble solenoid valve)	ON/OFF		Engine speed is below approx. 3,750 rpm: ON Others: OFF	Inspect following PIDs: TP, ECT, RPM. Inspect variable tumble solenoid valve.	2I
IMTV*5 (Variable Intake-air control solenoid valve)	ON/OFF		Engine speed is below approx. 4,500 rpm: ON Others: OFF	Inspect following PIDs: RPM. Inspect VIS control solenoid valve.	2J
INGEAR*6 (Load/no load condition)	ON/OFF		CPP or CPP/PNP is ON: OFF Others: ON	Perform applicable DTC troubleshooting.	1D 1X
IVS (CTP condition)	IDLE/ OFF IDLE		CTP: IDLE Others: OFF IDLE	Perform applicable DTC troubleshooting.	1AJ 1AO
KNOCKR (Knocking retard)	°		Ignition switch ON: 0° Idle: 0°	Inspect knock sensor.	2U 2V
LOAD (Engine load)	%		Ignition switch ON: 0% Idle (after warm up): approx.19%	Inspect MAF sensor.	-
LONGFT1 (long term fuel trim)	%		Idle (after warm up): approx. -14-14%	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)	-
MAF (Mass airflow)	g/s		Ignition switch ON: approx. 0 g/s Idle (after warm up): approx. 1.5 g/s	Inspect MAF sensor.	1AK
	V		Ignition switch ON: approx. 0.7 V Idle (after warm up): approx. 1.3 V
MAP (Manifold absolute pressure)	kPa, inHg		Ignition switch ON (at sea level): approx. 101 kPa {29.8 inHg}	Inspect MAP sensor.	2AG
	V		Ignition switch ON (at sea level): approx. 4.1 V
MIL (Malfunction indicator lamp)	ON/OFF		Ignition switch ON: ON Idle: OFF	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)	-
MIL_DIS (Travelled distance since the MIL illuminated)	km, mile		No DTC: 0 km {0 mile} DTC detected: Not 0 km {0 mile}	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)	-
NUMKEYS (Number of keys stored in module)	-		Indicate the number of the keys stored module	-	-
O2S11 (A/F sensor)	A		Ignition switch ON: -1.0-1.0 A Idle (After warm up): 0.25 A more	A/F sensor	2Z 2AC 2AD
O2S12 (HO2S)	V		Idle (After warm up): approx. 0.6 V	Inspect HO2S.	2Q
	Rich/Lean		Idle (After warm up): Rich
PSP (Power steering pressure switch)	Low/High		Steering wheel in straight ahead position: Low Others: High	Inspect PSP switch.	2T
RFCFLAG (Readness function code)	Learnt/Not Learnt		Before running PCM adaptive memory procedure drive mode: Not Learnt After running PCM adaptive memory procedure drive mode: Learnt	Run PCM adaptive memory procedure drive mode.	-
RO2FT1 (HO2S fuel trim)	-		Idle (after warm up): approx. -0.03-0.03	Perform applicable DTC troubleshooting.	-
RPM (Engine speed)	rpm		Indicate the engine speed	Inspect CKP sensor.	2W
SCCS (Speed control command switch)	V		Press ON/OFF: Approx. 0 V Press CANCEL: Approx. 1.2 V Press SET/COAST: Approx. 3.2 V Press RES/ACCEL: Approx. 4.2 V Others: Approx. 5.0 V	Inspect cruise control switch.	-
SEGRP (EGR valve (stepping motor) position)	Step		Ignition switch ON: 0 step Idle: 0 step Cranking: 0-60 steps	Inspect following PIDs: MAF, TP, ECT, RPM, VSS. Inspect EGR valve.	2G 2H 2K 2L
SEGRP DSD (Desired SEGRP valve position)	%		Idle: 0%	Inspect following PIDs: MAF, TP, ECT, RPM, VSS.	2G 2H 2K 2L
SELTESTDTC (Diagnostic trouble codes)	-		-	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)	-
SHRTFT1 (Short term fuel trim)	%		Idle (after warm up): approx.-30-25%	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)	-
SHRTFT12 (Short term fuel trim bank 1 sensor 2)	%		Idle (after warm up): Approx.-30-25%	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)	-
SPARKADV (Ignition timing)	°		Ignition switch ON: BTDC 0° Idle: BTDC approx. 10°	Inspect following PIDs: MAF, TP, ECT, RPM, INGEAR, TR, PSP, ACSW, VPWR. Inspect ignition timing.	2AT 2AW 2AX 2BA
TEST (Test mode)	ON/OFF		-	-	-
TIRESIZE (Tire Size (rev / mile))	rev/mile		Indicate the tire circumference length	-	-
TP REL (Relative throttle position)	%		APP released: Approx. 10% APP depressed: Approx. 93%	Inspect TP sensor.	-
TP 1 (TP)	%		APP released: 8-12% APP depressed: 88-94%	Inspect TP sensor.	2AK
	V		APP released: 0.4-0.6 V APP depressed: 4.4-4.7 V
TP 2 (TP)	%		APP released: 88-92% APP depressed: 6-12%	Inspect TP sensor.	2AL
	V		APP released: 4.4-4.6 V APP depressed: 0.3-0.6 V
TPCT (TP sensor voltage at CTP)	V		Approx. 0.5 V	Inspect TP sensor.	2AK 2AL
VSS (Vehicle speed)	kph, mph		Vehicle speed 20 kph {12 mph}: 20 kph {12 mph} Vehicle speed 40 kph {25 mph}: 20 kph {12 mph}	Perform applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)	-
VT ACT1 (Actual valve timing)	°		Idle: Approx. 0°	Inspect following PIDs: TP, ECT, RPM. Inspect OCV.	2E
VT DIFF1 (Difference between target and actual valve timing)	°		Idle: Approx. 0°	Inspect following PIDs: TP, ECT, RPM. Inspect OCV.	2E
VT DUTY1 (Oil control valve duty value)	%		Idle: Approx. 11.5%	Inspect following PIDs: TP, ECT, RPM. Inspect OCV.	2E

*¹ :

Calculated value; differs from terminal voltage

*² :

Refrigerant pressure switch (middle) turns on when the refrigerant pressure is 1.69-1.84 MPa {17.3-18.7 kgf/cm², 247-265 psi}

*³ :

Refrigerant pressure switch (middle) turns off when the refrigerant pressure is 1.26-1.49 MPa {12.9-15.1 kgf/cm², 184-214 psi}

*⁴ :

LF, L3

*5 :

L3

*⁶ :

MTX

*⁷ :

With immobilizer sysetem

*⁸ :

Without immobilizer sysetem

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)

Inspection Using An Oscilloscope (Reference)

VSS signal

• 2M, 2N(+)-body ground(-)

• 1 V/DIV (Y), 10 ms/DIV (X), DC range

• Drive the vehicle with approx. 10 km/h {6.2 mph}

Purge control signal

• 2C(+)-body ground(-)

• 2 V/DIV (Y), 10 ms/DIV (X), DC range

• Idle after warm up (no load, P/S off, A/C off)

OCV control signal

• 2E(+)-body ground(-)

• 2 V/DIV (Y), 0.8 ms/DIV (X), DC range

• Idle after warm up (no load, P/S off, A/C off)

CMP sensor signal

• 2S(+)-body ground(-)

• 2 V/DIV (Y), 25 ms/DIV (X), DC range

• Idle after warm up (no load, P/S off, A/C off)

CKP sensor signal

• 2W(+)-body ground(-)

• 2 V/DIV (Y), 2.5 ms/DIV (X), DC range

• Idle after warm up (no load, P/S off, A/C off)

Generator field coil control signal

• 2AI(+)-body ground(-)

• 0.5 V/DIV (Y), 1 ms/DIV (X), DC range

• Idle after warm up (no load, P/S off, A/C off)

Generator output voltage signal

• 2AJ(+)-body ground(-)

• 2 V/DIV (Y), 2 ms/DIV (X), DC range

• Idle after warm up (no load, P/S off, A/C off)

IGT1, IGT2, IGT3, IGT4 control signals

• IGT1(ignition coil No.1): 2BA(+)-body ground(-)

• IGT2(ignition coil No.2): 2AW(+)-body ground(-)

• IGT3(ignition coil No.3): 2AX(+)-body ground(-)

• IGT4(ignition coil No.4): 2AT(+)-body ground(-)

• 4 V/DIV (Y), 0.01 ms/DIV (X), DC range

• Idle after warm up (no load, P/S off, A/C off)

Fuel injection control

• 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(-)

• 4 V/DIV (Y), 10 ms/DIV (X), DC range

• Idle after warm up (no load, P/S off, A/C off)

HO2S heater control

• 2BE(+)-body ground(-)

• 2 V/DIV (Y), 1 s/DIV (X), DC range

• Idle (immediately after starting the engine)

A/F sensor heater control

• 2BG(+)-body ground(-)

• 2 V/DIV (Y), 500 ms/DIV (X), DC range

• Idle (immediately after starting the engine)