PCM INSPECTION [ZY, Z6]

id0140a0802500

Not Using the WDS or Equivalent

Note

•  The PCM terminal voltage can vary with conditions when measuring and changes due to age deterioration on the vehicle, causing false diagnosis. Therefore a comprehensive inspection of the input and output systems, and the PCM is necessary to determine where the malfunction occurs.

PCM terminal voltage table (Reference)

am3zzw00009183

Terminal voltage table (Reference)

Inspection Using An Oscilloscope (Reference)

Input/turbine speed sensor (–) signal

am3zzw00009184

PCM terminals

•  1K (+)—Negative battery terminal (–)

Oscilloscope setting

•  500 mV/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

Input/turbine speed sensor (+) signal

am3zzw00009185

PCM terminals

•  1O (+)—Negative battery terminal (–)

Oscilloscope setting

•  500 mV/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

Pressure control solenoid (+) signal

am3zzw00009186

PCM terminals

•  1AF (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  All of the following conditions are met.

―  Ignition switch is turned to the ON position. (engine off)

―  P or N position

―  CTP

Pressure control solenoid (–) signal

am3zzw00009187

PCM terminals

•  1AV (+)—Negative battery terminal (–)

Oscilloscope setting

•  200 mV/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition

•  All of the following conditions are met.

―  Ignition switch is turned to the ON position. (engine off)

―  P or N position

―  CTP

Vehicle speed signal (ATX)

am3zzw00009188

PCM terminals

•  1AY (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Vehicle speed is 32 km/h {20 mph}.

Shift solenoid A signal

am3zzw00009189

PCM terminals

•  1AZ (+)—Negative battery terminal (–)

Oscilloscope setting

•  5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition

•  4GR

Shift solenoid C signal

am3zzw00009190

PCM terminals

•  1BD (+)—Negative battery terminal (–)

Oscilloscope setting

•  5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition

•  1GR or 2GR

Shift solenoid B signal

am3zzw00009191

PCM terminals

•  1BH (+)—Negative battery terminal (–)

Oscilloscope setting

•  5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition

•  1GR (except L range (HOLD))

Fuel injection control signal

am3zzw00009192

PCM terminals

•  No.1: 2B (+)—Negative battery terminal (–)

•  No.2: 2C (+)—Negative battery terminal (–)

•  No.3: 2D (+)—Negative battery terminal (–)

•  No.4: 2H (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm-up

ESA control signal

am3zzw00009193

PCM terminals

•  No.1: 2Y (+)—Negative battery terminal (–)

•  No.2: 2U (+)—Negative battery terminal (–)

•  No.3: 2Q (+)—Negative battery terminal (–)

•  No.4: 2M (+)—Negative battery terminal (–)

Oscilloscope setting

•  0.5 V/DIV (Y), 40 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

CKP signal

am3zzw00009194

PCM terminals

•  2P (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm-up

IAC (–) signal

am3zzw00009195

PCM terminals

•  2AB (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm-up

Oxygen concentration signal

am3zzw00009196

PCM terminals

•  2AI (+)—Negative battery terminal (–)

Oscilloscope setting

•  0.2 V/DIV (Y), 1 s/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

Variable valve timing control (+) signal

am3zzw00009197

PCM terminals

•  2AK (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm-up

HO2S heater signal

am3zzw00009198

PCM terminals

•  2AM (+)—Negative battery terminal (–)

Oscilloscope setting

•  2 V/DIV (Y), 0.1 s/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

Generator control signal

am3zzw00009199

PCM terminals

•  2AN (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm-up

Generator output voltage signal

am3zzw00009200

PCM terminals

•  2AR (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm-up

Purge control signal

am3zzw00009201

PCM terminals

•  2AV (+)—Negative battery terminal (–)

Oscilloscope setting

•  2 V/DIV (Y), 0.1 s/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

CMP signal

am3zzw00009202

PCM terminals

•  2BB (+)—Negative battery terminal (–)

Oscilloscope setting

•  1 V/DIV (Y), 20 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

Using the WDS or Equivalent

Note

•  PIDs for the following parts are not available on this model. Go to the appropriate part inspection page.

―  CMP sensor (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [ZY, Z6].)

―  Main relay (See RELAY INSPECTION.)

1.  Connect the WDS or equivalent to the DLC-2.

2.  Turn the ignition switch to the 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.

•  The simulation items that are used in the ENGINE CONTROL SYSTEM OPERATION INSPECTION are as follows.

―  ACCS, ALTF, ARPMDES, EVAPCP, FAN_DUTY, FP, FUELPW1, GENVDSD, HTR11, HTR12, IAC, IMRC, IMTV, INJ_1, INJ_2, INJ_3, INJ_4, SEGRP, test, VT ACT1, VT DUTY1

Item (definition)	Unit/Condition				Condition/Specification (Reference)	Inspection item(s)	PCM terminal
AC_REQ (Refrigerant pressure switch (low pressure switch, high pressure switch))	On/Off				•  Refrigerant pressure is more than the specification or less than the specification. (Refrigerant pressure switch (low pressure switch, high pressure switch) is off.): Off •  Others: On	•  Refrigerant pressure switch (low pressure switch, high pressure switch)	1Q
ACCS (A/C relay)	On/Off				•  A/C is operating: On •  A/C is not operating: Off	•  The following PIDs ―  CPP, CPP/PNP, PSP, ECT, PCM_T, RPM, TP, TR, AC_REQ, COLP	1AL
ALTF (Generator field coil control duty value)	%				•  Ignition switch is turned to the ON position: 0% •  Idling, E/L is operating: Duty value increases.	•  The following PIDs ―  ECT, IAT, RPM, VSS, ALTT V, VPWR •  Generator	2AN
ALTT V (Generator output voltage)	V				•  Ignition switch is turned to the ON position: Approx. 1.0 V or less •  Idling (no electrical load): Approx. 14 V (This is an internal calculation value and differs from the terminal voltage.)	•  Generator	2AR
ARPMDES (Target engine speed)	RPM				•  Indicate the target engine speed	•  The following PIDs ―  CPP, CPP/PNP, PSP, ECT, IAT, RPM, TP, MAF, BARO, VSS, AC_REQ, COLP •   IAC valve	—
BARO (Barometric pressure)	kPa	Bar		psi	•  Ignition switch is turned to the ON position: Indicate the atmospheric pressure	•  BARO sensor	2S
	V				•  Ignition switch is turned to the ON position ―  Altitude: 0 m {0 ft}: 2.3—2.8*1 ―  Altitude:500 m {1,640 ft}: 2.2—2.8*1 ―  Altitude:1,000 m {3,281 ft}: 2.1—2.8*1 ―  Altitude:1,500 m {4921 ft}: 2.0—2.8*1 ―  Altitude: 2,000 m {6,562 ft}: 1.9—2.7*1 ―  Altitude: 2,500 m {8,202 ft}: 1.8—2.6*1
BOO (Brake switch)	On/Off				•  Brake pedal is depressed: On •  Brake pedal is released: Off	•  Brake switch	1V
CATT11_DSD (Estimated catalytic converter temperature)	°C		°F		•  Idling after warm up: approx. 440 °C {824 °F} •  Indicate the estimated catalytic converter temperature	•  The following PIDs ―  BARO, ECT, IAT, MAF, RPM	—
CHRGLP (Generator warning light)	On/Off				•  Ignition switch is turned to the ON position: On •  Idling: Off	•  Generator warning light	—
COLP (Refrigerant pressure switch (medium pressure switch))	On/Off				•  Refrigerant pressure is 1.52 MPa {15.5 kgf/cm2, 221 psi} or more: On •  Refrigerant pressure is 12.3 MPa {125 kgf/cm2, 1783 psi} or less: Off	•  Refrigerant pressure switch (medium-pressure switch)	1U
CPP*2 (Clutch pedal position)	On/Off				•  Clutch pedal is depressed: On •  Clutch pedal is released: Off	•  CPP switch	1P
CPP/PNP*2 (Shift lever position)	Drive/Neutral				•  Neutral: Neutral •  Other than neutral: Drive	•  Neutral switch	1AB
DTCCNT (Number of DTC detected)	No unit				•  Number of DTCs stored	—	—
DWN SW*3	(See PID/DATA MONITOR INSPECTION)
ECT (Engine coolant temperature)	°C		°F		•  Ignition switch is turned to the ON position: Indicate the ECT	•  ECT sensor	2J
	V				•  ECT is 20 °C {68 °F}: Approx. 3.0 V •  ECT is 60 °C {140 °F}: Approx. 1.4 V •  ECT is 80 °C {176 °F}: Approx. 0.9 V
EQ_RAT_DSD (Theoretical air/fuel ratio coefficient to calculate target air/fuel ratio)	No unit				•  Idling after warm-up: Approx.1	•  Front HO2S	—
EVAPCP (Purge solenoid valve duty value)	%				•  Ignition switch is turned to the ON position: 0 % •  Increase the engine speed: Duty value rises	•  The following PIDs ―  ECT, IAT, RPM, TP, MAF, O2S11, BOO, VPWR	2AV
FAN_DUTY (Fan control duty value)	%				•  When all of following condition are met: 90 % ―  Test mode On ―  WOP	•  The following PIDs ―  test, TP	—
FP (Fuel pump relay)	On/Off				•  Immediately after ignition switch is turned to the ON position: On •  Ignition switch is turned to the ON position: Off •  Idling: On •  Cranking: On	•  Fuel pump relay	1AC*6 1AH*7
FUELPW (Fuel injector duration)	ms				•  Idling: Approx. 2.0 ms	•  The following PIDs ―  CPP, CPP/PNP, PSP, ECT, IAT, RPM, TP, MAF, O2S11, O2S12, BARO, VSS, TR, BOO, AC_REQ, COLP, VPWR	2B, 2C, 2D, 2H
FUELSYS (Fuel system status)	OL/CL/ OL Drive/ OL Fault/ CL Fault				•  Idling after warm-up: CL	•  The following PIDs ―  CPP, CPP/PNP, PSP, ECT, IAT, RPM, TP, MAF, O2S11, O2S12, BARO, VSS, TR, BOO, AC_REQ, COLP, VPWR	—
GEAR*3	(See PID/DATA MONITOR INSPECTION)
GENVDSD (Target generator voltage)	V				•  Indicate the target generator voltag	•  The following PIDs ―  ECT, IAT, RPM, VSS, ALTT V, VPWR •  Generator	—
HTR11 (Front HO2S heater control)	On/Off				•  Ignition switch is turned to the ON position: Off •  When the vehicle is driving at engine speed less than 4,300 rpm: On	•  The following PIDs ―  ECT, IAT, RPM, TP, MAF, BARO, VPWR	2AM
HTR12 (Rear HO2S heater control)	On/Off				•  After fixed period of time from engine start: On •  Engine speed is 2,700 or more: Off	•  The following PIDs ―  ECT, IAT, RPM, TP, MAF, BARO, VPWR	2AT
IAC (IAC duty value)	%				•  Ignition switch is turned to the ON position: 0 % •  Idling (ECT is 88 °C {190 °F}, no load condition): Approx. 25 %	•  The following PIDs ―  CPP, CPP/PNP, PSP, ECT, IAT, RPM, TP, MAF, BARO, VSS, AC_REQ, COLP	2X, 2AB
IAT (Intake air temperature)	°C		°F		•  Ignition switch is turned to the ON position: Indicate the IAT	•  IAT sensor	2AQ
	V				•  IAT is 20°C {68°F}: Approx. 2.2 V •  IAT is 30°C {86°F}: Approx. 1.8 V
IMRC (Variable tumble control)	%				•  Cold start and 3,250 rpm or less: 12.5—50 •  Hot start or 3,250 rpm or more: 12.5—42	•  The following PIDs ―  ECT, RPM, TP	2AF, 2AJ
	On/Off				•  Cold start and 3,250 rpm or less: On •  Hot start or 3,250 rpm or more: Off
IMTV (Variable intake-air control)	%				•  Engine speed is less than 4,100 rpm: 12.5—50 •  Engine speed is 4,100 rpm or more: 12.5—42	•  The following PIDs ―  RPM	2AO, 2AS
	On/Off				•  Engine speed is less than 4,100 rpm: On •  Engine speed is 4,100 rpm or more: Off
INGEAR (Gears are engaged.)	On/Off				MTX •  When the following conditions are satisfied: On ―  Not neutral ―  Clutch pedal released •  Except above: Off	•  CPP switch •  Neutral switch	1P, 1AB
					ATX •  Driving range: On •  Except above: Off	•  TR switch	—
IVS (CTP condition)	Idle/Off Idle				•  Idling: Idle •  Other than idling: Off Idle	•  The following PIDs ―  TP	—
KNOCKR (Knocking retard)	°				•  Ignition switch is turned to the ON position: 0 ° •  Idling: 0 °	•  KS	2BA
LINEDES*3	(See PID/DATA MONITOR INSPECTION)
LOAD (Engine load)	%				•  Idling (after warm-up): Approx. 23 %	•  The following PIDs ―  BARO, IAT, MAF, RPM	—
LONGFT1 (Long term fuel trim)	%				•  Idling (after warm-up): Approx. –15—+15 %	•  The following PIDs ―  CPP, CPP/PNP, PSP, ECT, IAT, RPM, TP, MAF, O2S11, O2S12, BARO, VSS, TR, BOO, AC_REQ, COLP, VPWR	—
LPS*3	(See PID/DATA MONITOR INSPECTION)
MAF (Mass air flow)	g/s				•  Ignition switch is turned to the ON position: Approx. 0 g/s •  Idling: Approx. 2.7 g/s	•  MAF sensor	2AU
	V				•  Ignition switch is turned to the ON position: Approx. 0.7 V •  Idling: Approx. 1.3 V
MIL (Malfunction indicator lamp)	On/Off				•  Ignition switch is turned to the ON position: On •  Idling: Off (If there is a malfunction in emission control related system: On)	•  MIL	—
MIL_DIS (Travelled distance since MIL illuminated)	km		mile		Indicate the travelled distance since the MIL illuminated
MNL SW*3	(See PID/DATA MONITOR INSPECTION)
O2S11 (Front HO2S)	V				•  Ignition switch is turned to the ON position: 1.0 V or less •  Idling (after warm-up): Alternates between 0 and 1.0 V	•  Front HO2S	2AI
O2S12 (Rear HO2S)	V				•  Idling (after warm-up): Alternates between 0 and 1.0 V	•  Rear HO2S	2K
OP_SW_B*3	(See PID/DATA MONITOR INSPECTION)
PCM_T (PCM temperature sensor)	V				•  Ignition switch is turned to the ON position: Indicate the PCM temperature sensor output voltage	•  PCM	—
PCM_T_Max (Maximum PCM temperature)	V				•  Ignition switch is turned to the ON position: Indicate the maximum PCM temperature sensor output voltage	•  PCM	—
PSP (PSP switch)	High/Low				•  Steering wheel is in straight ahead position: Low •  Steering wheel is fully turned: High	•  PSP switch	2AC
RFCFLAG (PCM adaptive memory produce verification)	Learnt/Not Learnt				•  Idling (after running PCM adaptive memory procedure drive mode): Learnt •  Right after the negative battery cable is disconnected (before running PCM adaptive memory procedure drive mode): Not Learnt	•  Perform “DRIVE MODE”.	—
RO2FT1 (Rear oxygen sensor fuel trim)	No unit				•  Idling after warm-up: Approx. –0.03—+0.03	•  The following PID ―  O2S12	2K
RPM (Engine speed)	RPM				•  Indicate the engine speed	•  CKP sensor	2P
SEGRP (EGR control)	Step				•  Ignition switch is turned to the ON position: 0 step •  Idling: 0 step •  Vehicle driving when engine speed is 1,000—4,700 rpm: 0—52 step	•  EGR valve	2N, 2R, 2V, 2Z
SEGRP DSD (EGR valve position desired)	%				•  Ignition switch is turned to the ON position: 0 % •  Idling: 0 % •  Vehicle driving when engine speed is 1,000—4,700 rpm: 0—100 %	•  The following PID ―  MAF, TP, ECT, RPM, VSS	—
SHRTFT1 (Short term fuel trim (front))	%				•  Idling (after warm-up): –25—+25%	•  The following PIDs ―  CPP, CPP/PNP, PSP, ECT, IAT, RPM, TP, MAF, O2S11, O2S12, BARO, VSS, TR, BOO, AC_REQ, COLP, VPWR	—
SHRTFT11 (Short term fuel trim (front))	%				•  Idling (after warm-up): –25—+25%	•  The following PIDs ―  CPP, CPP/PNP, PSP, ECT, IAT, RPM, TP, MAF, O2S11, O2S12, BARO, VSS, TR, BOO, AC_REQ, COLP, VPWR	2AI
SHRTFT12 (Short term fuel trim (rear))	%				•  Idling after warm-up: Approx. 99 %	•  The following PIDs ―  CPP, CPP/PNP, PSP, ECT, IAT, RPM, TP, MAF, O2S11, O2S12, BARO, VSS, TR, BOO, AC_REQ, COLP, VPWR	2K
SPARKADV (Ignition timing)	° (BTDC)				•  Indicate the ignition timing	•  The following PIDs ―  CPP, CPP/PNP, PSP, ECT, IAT, RPM, TP, MAF, KNOCKR, TR, BOO, AC_REQ, COLP	2BB
SSA/SS1*3	(See PID/DATA MONITOR INSPECTION)
SSB/SS2*3	(See PID/DATA MONITOR INSPECTION)
SSC/SS3*3	(See PID/DATA MONITOR INSPECTION)
TCS*3	(See PID/DATA MONITOR INSPECTION)
test (Test mode)	On/Off				•  During test mode: On •  Other than test mode: Off	—	—
TFT*3	(See PID/DATA MONITOR INSPECTION)
TFTV*3	(See PID/DATA MONITOR INSPECTION)
TIRESIZE (Tire revolution per mile)	No unit				•  Indicate the tire revolution per a mile
TP (TP)	%				•  CTP: Approx. 12 % •  WOT: Approx. 75 %	•  TP sensor	2AA
	V				•  CTP: 0.3—1.0 V •  WOT: 3.1—4.5 V
TP REL (Throttle position signal (relative value))	%				•  CTP: Approx. 0 % •  WOT: Approx. 100 %	•  TP sensor	2AA
TPCT (TP sensor voltage at CTP)	V				•  0.3—1.0 V	•  TP sensor	2AA
TR*3	(See PID/DATA MONITOR INSPECTION)
TR_SENS*3	(See PID/DATA MONITOR INSPECTION)
TSS*3	(See PID/DATA MONITOR INSPECTION)
UP SW*3	(See PID/DATA MONITOR INSPECTION)
VPWR (Battery positive voltage)	V				•  Ignition switch is turned to the ON position.: B+ •  Idling: B+	•  Battery •  Main relay	1AX, 1BB, 1BF
							1BG*3
Vref (Constant voltage)	V				•  Ignition switch is turned to the ON position.: Approx. 5 V	•  Battery	2W
VSS (Vehicle speed)	KPH		MPH		•  Vehicle running: Indicate the vehicle speed	•  VSS	*2—
							*31AY
VT ACT1 (Actual valve timing)	°				•  Idling: 0 ° •  Racing: 0—25 °	•  The following PIDs ―  ECT, RPM, TP, MAF •  OCV	2AG, 2AK
VT DIFF1 (Difference between target valve timing and actual valve timing)	°				•  Idling: 0 °	•  The following PIDs ―  ECT, RPM, TP, MAF •  OCV	—
VT DUTY1 (OCV control)	%				•  Idling: Approx. 10 %	•  The following PIDs ―  ECT, RPM, TP, MAF	2AG, 2AK