PCM INSPECTION [WITH WU-TWC]

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

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

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2. Turn the ignition switch to the ON position.

3. Inspect the monitor items.

  • If the monitor item condition/specification (reference) is not within the specification, inspect “Inspection item (s)”.

  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 not within specification, inspect the monitored value of the input device related to the output control.
  • The simulation items are as follows.
    ― ACCS
    ― ALTF
    ― ARPMDES
    ― EVAPCP
    ― FAN1
    ― FAN2
    ― FP
    ― FUELPW1
    ― GENVDSD
    ― HTR11
    ― IAC
    ― IMRC
    ― IMTV
    ― INJ_1, INJ_2, INJ_3, INJ_4
    ― test
    ― VT DUTY1
    ― SEGRP

PID/DATA monitor table (reference)

Monitor item (definition) | Unit/Condition | Condition/Specification (Reference) | Inspection item (s) | PCM terminal
--- | --- | --- | --- | ---
A/CL V (Refrigerant pressure switch (Low, high)) | V | • A/C is not operating: Approx. 5 V • A/C is operating: 1.0 V or less | • Refrigerant pressure switch (Low, high) | 1U
A/CT (Evaporator temperature) | °C, °F | • Evaporator temperature is 20 °C {68 °F}: 20 °C {68 °F} | • Evaporator temperature sensor | 1AD
A/CT V (Evaporator temperature (Voltage)) | V | • Evaporator temperature is 20 °C {68 °F}: 2.5 V | • Evaporator temperature sensor | 1AD
ACCS (A/C relay) | On/Off | • A/C is operating: On • A/C is not operating: Off | • Inspect the following monitor items: ― ACSW, ALTT V, ECT, PSP, RPM, TP | 1AL
ACSW (A/C switch) | On/Off | • A/C switch is on: On • A/C switch is off: Off | • A/C switch | 1Q
ALTF (Generator field coil control duty value) | % | • Ignition switch is ON: 0% • Idling, E/L is operating: Duty value increases. | • Inspect the following monitor items: ― ALTT V, VPWR, IAT, RPM • Generator | 2AN
ALTT V (Generator output voltage) | V | • Ignition switch is ON: Approx. 1.0 V or less • Idling (No electrical load): Approx. 14.9 V (This is an internal calculation value and differs from the terminal voltage.) | • Inspect the following monitor items: ― ALTF, VPWR, IAT, RPM • Generator | 2AR
ARPMDES (Target engine speed) | RPM | • Indicates the target engine speed | • Inspect the following monitor items: ― A/CL V, ACCS, ACSW, ALTT V, ECT, IAT, MAF, PSP, test, TP, CPP/PNP, RPM • IAC valve | —
BOO (Brake switch) | On/Off | • Brake pedal is depressed: On • Brake pedal is released: Off | • Brake switch | 1V
CPP*1 (Clutch pedal position) | On/Off | • Clutch pedal is depressed: On • Clutch pedal is released: Off | • Clutch switch | 1P
CPP/PNP*1 (Shift lever position) | Drive/Neutral | • Neutral: Neutral • Other than neutral: Drive | • Neutral switch | 1AB
DTCCNT (Number of DTC detected) | — | • Number of DTCs output | — | —
ECT (Engine coolant temperature) | °C, °F | • ECT is 20 °C {68 °F}: 20 °C {68 °F} • ECT is 60 °C {140 °F}: 60 °C {140 °F} • ECT is 80 °C {176 °F}: 80 °C {176 °F} | • 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
EVAPCP (Purge solenoid valve duty value) | % | • Ignition switch is ON: 0 % • Idling: 10 % | • Inspect the following monitor items: ― VPWR, ECT, O2S11, MAF, RPM, test, TP | 2AV
FAN1 (Fan relay No.1 control) | On/Off | • During test mode CTP: Off WOT: On | • Inspect the following monitor items: ― ECT, test, TP | 1AT
FAN2 (Fan relay No.2 control) | On/Off | • During test mode CTP: Off WOT: On | • Inspect the following monitor items: ― ECT, test, TP | 1I
FP (Fuel pump relay) | On/Off | • Ignition switch is ON: Off • Idling or cranking: On | • Fuel pump relay | 1AH
FUELPW (Fuel injector duration) | ms | • Idling: Approx. 3.0 ms | • Inspect the following monitor items: ― MAF, IAT, RPM, ECT, O2S11, TP, TR, PSP, VSS, ACSW, BOO, VPWR | 2B, 2C, 2D, 2H
FUELSYS (Fuel system status) | OL_Drive/ OL/ CL_Fault/ OL_Fault/ CL | • Idling after completely warmed up: CL • Deceleration with CTP: OL | • Inspect the following monitor items: ― MAF, IAT, RPM, ECT, O2S11,TP, TR, PSP, VSS, ACSW, BOO, VPWR | —
GEAR*2 | (See PID/DATA MONITOR INSPECTION [FN4A-EL].)
GENVDSD (Generator voltage desired) | V | • Idling (No electrical load): Approx. 14.9 V (This is an internal calculation value and differs from the terminal voltage.) | • Inspect the following monitor items: ― ALTF, VPWR, IAT, RPM • Generator | —
HTR11 (HO2S heater control) | On/Off | • Ignition switch is ON: Off • Engine speed is 4,300 rpm or less: On | • Inspect the following monitor items: ― ECT, MAF, RPM, TP, VPWR | 2AM
IAC (IAC valve control) | % | • Ignition switch is ON: 0 % • Idling (ECT is 90 °C {194 °F}, no load condition): Approx. 23 % | • Inspect the following monitor items: ― A/CL V, ACSW, ALTT V, ECT, PSP, test, TP, RPM | 2X, 2AB
IAT (Intake air temperature) | V | • IAT is 20°C {68°F}: Approx. 2.5 V • IAT is 30°C {86°F}: Approx. 1.8 V | • IAT sensor | 2AQ
°C, °F | • IAT is 20 °C {68 °F}: 20 °C {68 °F} • IAT is 30 °C {86 °F}: 30 °C {86 °F}
IMRC (VTCS) | On/Off | • Cold start and 3,250 rpm or less: On • Hot start or 3,250 rpm or more: Off | • Inspect the following monitor items: ― TP, RPM, ECT | 2AF, 2AJ
IMTV*4 (VIS) | On/Off | • Engine speed is less than 4,100 rpm: On • Engine speed is 4,100 rpm or more: Off | • Inspect the following monitor items: ― TP, RPM, ECT | 2AO, 2AS
INGEAR (Gears are engaged.) | On/Off | • Clutch pedal is released: On • Clutch pedal is depressed: Off • Other than neutral: On • Neutral: Off | • Clutch switch • Neutral switch | *11P, 1AB
• Other than P and N positions: On • P or N position: Off | • TR switch | *2—
IVS (CTP condition) | Idle/Off Idle | • Idling: Idle • Other than idling: Off Idle | • Inspect the following monitor item: ― TP | 2AA
KNOCKR (Knocking retard) | ° | • Ignition switch is at the ON position: 0° • Idling: 0° | • Knock sensor | 2BA
LINEDES*2 | (See PID/DATA MONITOR INSPECTION [FN4A-EL].)
LOAD (Engine load (charging efficiency)) | % | • Idling (After warm-up): Approx. 19% | • DTC inspection | —
LONGFT1 (Long term fuel trim) | % | • Idling (After warm-up): Approx. –14—+14 % | • DTC inspection | —
LPS*2 | (See PID/DATA MONITOR INSPECTION [FN4A-EL].)
MAF (Mass air flow) | g/s | • Ignition switch is ON: Approx. 0 g/s • Idling: Approx. 2.7 g/s | • MAF sensor | 2AU
V | • Ignition switch is ON: Approx. 0.7 V • Idling: Approx. 1.3 V
MAP*3 (Manifold absolute pressure) | kPa, Bar, psi | • Ignition switch is turned to the ON position: Indicate the atmospheric pressure | • MAP sensor | 2S
V | • Ignition switch is ON ― Altitude 2,500 m: 1.8—2.8 V
MIL (Malfunction indicator lamp) | On/Off | • Ignition switch is ON: On • Idling: Off | • DTC inspection | —
MIL_DIS (Distance travelled since MIL illuminated) | km, mile | • Distance travelled since MIL illuminated | — | —
O2S11 (HO2S voltage) | V | • Ignition switch is ON: 1.0 V or less • Idling (After warm-up): Alternates between 0 and 1.0 V • Acceleration (After warm-up): Alternates between 0.5 and 1.0 V • Deceleration (After warm-up): Alternates between 0 and 0.5 V | • HO2S | 2AI
Rich/Lean | • Acceleration (After warm-up): Rich • Deceleration (After warm-up): Lean
PSP (PSP switch) | High/Low | • Steering wheel is in straight ahead position: Low • Steering wheel is fully turned: High | • PSP switch | 2AC
RFCFLAG (Readiness function code) | 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 “AFTER REPAIR PROCEDURE”. | —
RPM (Engine speed) | RPM | • Indicates the engine speed | • CKP sensor | 2P
SEGRP*3 (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*3 (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 % | • Inspect the following monitor items: ― MAF, TP, ECT, RPM, VSS | —
SHRTFT1 (Short term fuel trim) | % | • Idling (After warm-up): –3—+25% | • DTC inspection | —
SPARKADV (Ignition timing) | ° (BTDC) | • During test mode: BTDC 9—11 ° (BTDC) • Idling: BTDC 6—18 ° (BTDC) | • Inspect the following monitor items: ― ACSW, ALTT V, VPWR, ECT, KNOCKR, test, TP, RPM, VSS | 2BB
SSA/SS1*2 | (See PID/DATA MONITOR INSPECTION [FN4A-EL].)
SSB/SS2*2 | (See PID/DATA MONITOR INSPECTION [FN4A-EL].)
SSC/SS3*2 | (See PID/DATA MONITOR INSPECTION [FN4A-EL].)
SWA*5 (Steering angle sensor) | ° | • Steering wheel in neutral position (Not turned): 0 ° • Steering wheel turned to left: Changes 0 °—negative • Steering wheel turned to right: Changes 0 °—positive | • Steering angle sensor | 1R, 1M
TCS*2 | (See PID/DATA MONITOR INSPECTION [FN4A-EL].)
test (Test mode) | On/Off | • During test mode: On • Other than test mode: Off | — | —
TFT*2 | (See PID/DATA MONITOR INSPECTION [FN4A-EL].)
TFTV*2 | (See PID/DATA MONITOR INSPECTION [FN4A-EL].)
THOP*2 | (See PID/DATA MONITOR INSPECTION [FN4A-EL].)
TP (TP) | % | • CTP: 0 % • WOT: 100 % | • TP sensor | 2AA
V | • CTP: 0.3—1.0 V • WOT: 3.1—4.5 V
TP REL (Throttle position signal (relative value)) | % | • CTP: 0 % • WOT: 100 % | • TP sensor | 2AA
TPCT (TP sensor voltage at CTP) | V | • 0.3—1.0 V | • TP sensor | 2AA
TR*2 | (See PID/DATA MONITOR INSPECTION [FN4A-EL].)
TR_SENS*2 | (See PID/DATA MONITOR INSPECTION [FN4A-EL].)
TSS*2 | (See PID/DATA MONITOR INSPECTION [FN4A-EL].)
VPWR (Battery positive voltage) | V | • Ignition switch is ON: B+ • Idling: B+ | • Battery • Main relay | 1AX, 1BF, 1BG
VSS (Vehicle speed) | KPH, MPH | • Vehicle is stopped: 0 KPH {0 MPH} • Vehicle speed is 25 km/h: 25 KPH {16 MPH} | • VSS | *11AA, 1AE
*21AY, 1BC
VT ACT1 (OCV control) | ° (BTDC) | • Idling: 0 ° • Racing: 0—25 ° | • Inspect the following monitor items: ― ECT, MAF, TP, RPM • OCV | 2AK, 2AG
VT DIFF1 (OCV control) | ° (BTDC) | • Idling: 0 ° | • Inspect the following monitor items: ― ECT, MAF, TP, RPM • OCV | —
VT DUTY1 (OCV control) | % | • Idling: Approx. 10 % | • Inspect the following monitor items: ― ECT, MAF, TP, RPM | 2AK, 2AG

*1 :MTX
*2 :ATX
*3 :ZJ
*4 :ZY
*5 :The steering angle will be cleared if the ignition switch is turned off. The sensor detects the steering angle after the ignition switch is turned to the ON position and the vehicle is driven straight at a vehicle speed of 20 km/h {12 mph} or more. The SWA value will be cleared every time the ignition switch is turned off, so the initial value (300 °) is displayed until the steering angle is detected. If the SWA value does not change from 300 °, drive the vehicle under 20 km/h {12 mph} or less until the steering angle is detected, and then monitor the item again.

Without Using WDS or Equivalent

  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.

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Terminal voltage table (Reference)

Terminal | Signal | Connected to | Test condition | Voltage (V) | Inspection item (s)
--- | --- | --- | --- | --- | ---
1A | — | — | — | — | —
1B | — | — | — | — | —
1C | — | — | — | — | —
1D | — | — | — | — | —
1E | — | — | — | — | —
1F | — | — | — | — | —
1G*1 | GND | Input/turbine speed sensor shield wire | Under any condition | 1.0 or less | • Related harness
1H | — | — | — | — | —
1I | Electric fan control | Cooling fan relay No. 2 | Test mode is on*2 | CTP | B+ | • Cooling fan relay No.2 • Related harness
WOT | 1.0 or less
1J | — | — | — | — | —
1K*1 | Input/turbine speed sensor (–) | Input/turbine speed sensor | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Input/turbine speed sensor • Related harness
1L | — | — | — | — | —
1M | Steering angle sensor (signal B) | Steering angle sensor | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Steering angle sensor • Related harness
1N | GND | Evaporator temperature sensor | Under any condition | 1.0 or less | • Related harness
1O*1 | Input/turbine speed sensor (+) | Input/turbine speed sensor | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Input/turbine speed sensor • Related harness
1P*3 | Clutch switch | Clutch switch | Ignition switch is ON | Clutch pedal depressed | 1.0 or less | • Clutch switch • Related harness
Clutch pedal released | Approx. 6.3
1Q | A/C operation | A/C switch, refrigerant pressure switch (low, high) | Ignition switch is ON | A/C switch is off | Approx. 5.0 | • A/C switch • Refrigerant pressure switch (low, high) • Related harness
A/C switch and fan switch are on | 1.0 or less
1R | Steering angle sensor (signal A) | Steering angle sensor | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Steering angle sensor • Related harness
1S | CAN_L | Instrument cluster, ABS HU/CM, DLC-2 | Because this terminal is for CAN, good/no good determination of terminal voltage is not possible. | —
1T | — | — | — | — | —
1U | Refrigerant pressure (middle) | Refrigerant pressure switch (middle) | Idle | Refrigerant pressure is specified value or more | 1.0 or less | • Refrigerant pressure switch (middle) • Related harness
Refrigerant pressure is specified value or less | Approx. 5.0
1V | Brake switch | Brake switch | Brake pedal depressed | B+ | • Brake switch • Related harness
Brake pedal released | 1.0 or less
1W | CAN_H | Instrument cluster, ABS HU/CM, DLC-2 | Because this terminal is for CAN, good/no good determination of terminal voltage is not possible. | —
1X*1 | Selector lever position | TR switch | Ignition switch is ON | P position | Approx. 4.6 | • TR switch • Related harness
R position | Approx. 3.9
N position | Approx. 3.2
D range | Approx. 2.5
S range | Approx. 1.7
L range | Approx. 0.94
1Y | — | — | — | — | —
1Z | Vehicle speed output | Car-navigation unit | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Car-navigation unit • Related harness
1AA*3 | Vehicle speed (–) | VSS | Under any condition | 1.0 or less | • VSS • Related harness
1AB*3 | Neutral switch | Neutral switch | Ignition switch is ON | Neutral | 1.0 or less | • Neutral switch • Related harness
Except above | Approx. 6.3
1AC | — | — | — | — | —
1AD | Evaporator temperature | Evaporator temperature sensor | Ignition switch is ON | Evaporator temperature is 20 °C {68 °F} | Approx. 2.5 | • Evaporator temperature sensor • Related harness
1AE*3 | Vehicle speed (+) | VSS | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • VSS • Related harness
1AF*1 | Pressure control solenoid (+) | Pressure control solenoid | Idle | B+ | • Pressure control solenoid • Related harness
1AG | — | — | — | — | —
1AH | Fuel pump control | Fuel pump relay | Ignition switch is ON | B+ | • Fuel pump relay • Related harness
Cranking | 1.0 or less
Idle
1AI | — | — | — | — | —
1AJ*1 | Shift solenoid D | Shift solenoid D | P or N position | B+ | • Shift solenoid D • Related harness
Except above | 1.0 or less
1AK | — | — | — | — | —
1AL | A/C cut-off control | A/C relay | A/C is operating | 1.0 or less | • A/C relay • Related harness
A/C is not operating | B+
1AM | — | — | — | — | —
1AN*1 | GND | TFT sensor, TR switch | Under any condition | 1.0 or less | • Related harness
1AO | — | — | — | — | —
1AP | — | — | — | — | —
1AQ*1 | HOLD switch | HOLD switch | Ignition switch is ON | HOLD switch pushed | 1.0 or less | • HOLD switch • Related harness
HOLD switch released | B+
1AR*1 | Shift solenoid E | Shift solenoid E | During TCC operation | B+ | • Shift solenoid E • Related harness
Except above | 1.0 or less
1AS | — | — | — | — | —
1AT | Electric fan control | Cooling fan relay No. 1 | Test mode is on*2 | CTP | B+ | • Cooling fan relay No.1 • Related harness
WOT | 1.0 or less
1AU*1 | ATF temperature | TFT sensor | Ignition switch is ON | TFT is 20 °C {68 °F} | Approx. 3.3 | • TFT sensor • Related harness
TFT is 40 °C {104 °F} | Approx. 2.4
TFT is 60 °C {140 °F} | Approx. 1.5
1AV*1 | Pressure control solenoid (–) | Pressure control solenoid | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Pressure control solenoid • Related harness
1AW | Main relay | Main relay | Ignition switch is off | 1.0 or less | • Main relay • Related harness
Ignition switch is ON
1AX | Back-up power supply | Battery | Under any condition | B+ | • Battery • Related harness
1AY*1 | Vehicle speed | VSS | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • VSS • Related harness
1AZ*1 | Shift solenoid A | Shift solenoid A | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Shift solenoid A • Related harness
1BA | ECT output | Climate control unit | Ignition switch is ON | ECT is 20 °C {68 °F} | Approx. 3.0 | • Climate control unit • Related harness
ECT is 60 °C {140 °F} | Approx. 1.4
ECT is 80 °C {176 °F} | Approx. 0.9
1BB | Battery voltage | Main relay | Ignition switch is off | 1.0 or less | • Main relay • Battery • Related harness
Ignition switch is ON | B+
1BC*1 | VSS power supply | VSS | Ignition switch is ON | B+ | • Related harness
1BD*1 | Shift solenoid C | Shift solenoid C | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Shift solenoid C • Related harness
1BE | Ignition switch | Ignition switch | Ignition switch is off | 1.0 or less | • Ignition switch • Related harness
Ignition switch is ON | B+
1BF | Battery voltage | Main relay | Ignition switch is off | 1.0 or less | • Main relay • Battery • Related harness
Ignition switch is ON | B+
1BG*1 | Battery voltage | Main relay | Ignition switch is off | 1.0 or less | • Main relay • Battery • Related harness
Ignition switch is ON | B+
1BH*1 | Shift solenoid B | Shift solenoid B | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Shift solenoid B • Related harness
2A | Ignition coil power supply | Ignition coil | Ignition switch is ON | B+ | • Related harness
2B | Fuel injection control | Fuel injector No.1 | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Fuel injector No.1 • Related harness
2C | Fuel injection control | Fuel injector No.2 | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Fuel injector No.2 • Related harness
2D | Fuel injection control | Fuel injector No.3 | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Fuel injector No.3 • Related harness
2E | Fuel injector No.1 power supply | Fuel injector No.1 | Ignition switch is ON | B+ | • Related harness
2F | Fuel injector No.2 power supply | Fuel injector No.2 | Ignition switch is ON | B+ | • Related harness
2G | Fuel injector No.3 power supply | Fuel injector No.3 | Ignition switch is ON | B+ | • Related harness
2H | Fuel injection control | Fuel injector No.4 | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Fuel injector No.4 • Related harness
2I | — | — | — | — | —
2J | ECT | ECT sensor | Ignition switch is ON | ECT is 20 °C {68 °F} | Approx. 3.0 | • ECT sensor • Related harness
ECT is 60 °C {140 °F} | Approx. 1.4
ECT is 80 °C {176 °F} | Approx. 0.9
2K | — | — | — | — | —
2L | Fuel injector No.4 power supply | Fuel injector No.4 | Ignition switch is ON | B+ | • Related harness
2M | ESA control | Ignition coil No.4 | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Ignition coil No.4 • Related harness
2N*6 | EGR control | EGR valve | Idle (EGR control operating) | 1.0 or less | • EGR valve • Related harness
2O | — | — | — | — | —
2P | CKP | CKP sensor | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • CKP sensor • Related harness
2Q | ESA control | Ignition coil No.3 | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Ignition coil No.3 • Related harness
2R*6 | EGR control | EGR valve | Idle (EGR control operating) | B+ | • EGR valve • Related harness
2S*6 | MAP sensor | MAP sensor | Ignition switch is ON | Altitude: 0—2,500 m {0—8,202 ft} | 1.8—2.8*7 | • MAP sensor • Related harness
2T | Input/output device power supply | CKP sensor, CMP sensor, HO2S, purge solenoid valve, EGR valve | Ignition switch is ON | B+ | • Related harness
2U | ESA control | Ignition coil No.2 | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Ignition coil No.2 • Related harness
2V*6 | EGR control | EGR valve | Idle (EGR control operating) | B+ | • EGR valve • Related harness
2W | Constant voltage (vref) | TP sensor, MAP sensor | Ignition switch is ON | Approx. 5.0 | • TP sensor • MAP sensor • Related harness
2X | IAC (+) | IAC valve | Idle | B+ | • IAC valve • Related harness
2Y | ESA control | Ignition coil No.1 | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Ignition coil No.1 • Related harness
2Z*6 | EGR control | EGR valve | Idle (EGR control operating) | 1.0 or less | • EGR valve • Related harness
2AA | TP | TP sensor | Ignition switch is ON | CTP | 0.3—1.0 | • TP sensor • Related harness
WOT | 3.1—4.5
2AB | IAC (–) | IAC valve | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • IAC valve • Related harness
2AC | PSP switch | PSP switch | Idle | Steering wheel at straight ahead position | B+ | • PSP switch • Related harness
While turning steering wheel | 1.0 or less
2AD | — | — | — | — | —
2AE | GND | TP sensor | Under any condition | 1.0 or less | • Related harness
2AF | VTCS (open) | VTCS shutter valve actuator | Engine is hot | When ignition switch is ON. | B+*5 | • VTCS shutter valve actuator • Related harness
Idle after cold start | When the ECT reaches 60 °C {140 °F}
Except above | 1.0 or less
2AG | Variable valve timing control (–) | OCV | Under any condition | 1.0 or less | • OCV • Related harness
2AH | — | — | — | — | —
2AI | Oxygen concentration | HO2S | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • HO2S • Related harness
2AJ | VTCS (close) | VTCS shutter valve actuator | Engine is cold | When ignition switch is ON. | B+*5 | • VTCS shutter valve actuator • Related harness
Except above | 1.0 or less
2AK | Variable valve timing control (+) | OCV | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • OCV • Related harness
2AL | — | — | — | — | —
2AM | HO2S heater control | HO2S heater | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • HO2S heater • Related harness
2AN | Generator control | Generator (terminal D) | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Generator • Related harness
2AO*4 | VIS (open) | VIS shutter valve actuator | When ignition switch is ON. | 1.0 or less | • VIS shutter valve actuator • Related harness
When the engine speed is increased gradually and reaches 4,100 rpm. | B+*5
Except above | 1.0 or less
2AP | — | — | — | — | —
2AQ | IAT | IAT sensor | Ignition switch is ON | IAT is 20 °C {68 °F} | Approx. 2.5 | • IAT sensor • Related harness
IAT is 30 °C {86 °F} | Approx. 1.8
2AR | Generator output voltage | Generator (terminal P) | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Generator • Related harness
2AS*4 | VIS (close) | VIS shutter valve actuator | When ignition switch is ON. | B+*5 | • VIS shutter valve actuator • Related harness
When the engine speed is decreased gradually and reaches 4,100 rpm.
Except above | 1.0 or less
2AT | — | — | — | — | —
2AU | MAF | MAF sensor | Ignition switch is ON | Approx. 0.7 | • MAF sensor • Related harness
Idle | Approx. 1.3
2AV | Purge control | Purge solenoid valve | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • Purge solenoid valve • Related harness
2AW | — | — | — | — | —
2AX | GND | ECT sensor, MAP sensor, HO2S | Under any condition | 1.0 or less | • Related harness
2AY | GND | IAT sensor | Under any condition | 1.0 or less | • Related harness
2AZ | GND | GND | Under any condition | 1.0 or less | • Related harness
2BA | Knocking | Knock sensor | Ignition switch is ON (Use digital type voltmeter, because measurement voltage will be detected less than true voltage when using analog type voltmeter) | Approx. 2.4 | • Knock sensor • Related harness
2BB | CMP | CMP sensor | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference).) | • CMP sensor • Related harness
2BC | GND | MAF sensor | Under any condition | 1.0 or less | • Related harness
2BD | GND | GND | Under any condition | 1.0 or less | • Related harness
2BE | GND | HO2S shield wire | Under any condition | 1.0 or less | • Related harness
2BF | GND | CMP sensor | Under any condition | 1.0 or less | • Related harness
2BG | MAF sensor power supply | MAF sensor | Idle | B+ | • Related harness
2BH | GND | GND | Under any condition | 1.0 or less | • Related harness

*1 :ATX
*2 :Turn the test mode on using the WDS simulation test.
*3 :MTX
*4 :ZY
*5 :The voltage changes for a specified time.
*6 :ZJ
*7 :The voltage may very excessively depending on the weather or battery conditions.

Inspection Using An Oscilloscope (Reference)

Input/turbine speed sensor signal

am2zzw00004550

  PCM terminals

  • 1O (+)—1K (–)

  Oscilloscope setting

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

  Vehicle condition

  • Idle at P position

Steering angle sensor signal

am2zzw00004551

  PCM terminals

  • Signal A: 1R (+)—Negative battery terminal (–)
  • Signal B: 1M (+)—Negative battery terminal (–)

  Oscilloscope setting

  • DC range

  Vehicle condition

  • Steering wheel in neutral position (not turned).

Vehicle speed output signal

am2zzw00004551

  PCM terminals

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

  Oscilloscope setting

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

  Vehicle condition

  • Vehicle speed is 20 km/h {12 mph}.

Vehicle speed (+) signal (MTX)

am2zzw00004552

  PCM terminals

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

  Oscilloscope setting

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

  Vehicle condition

  • Vehicle speed is 20 km/h {12 mph}.

Pressure control solenoid (–) signal

am2zzw00004784

  PCM terminals

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

  Oscilloscope setting

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

  Vehicle condition

  • Idle

Vehicle speed signal (ATX)

am2zzw00004555

  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

am2zzw00004556

  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

am2zzw00004557

  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

am2zzw00004558

  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

am2zzw00004559

  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

am2zzw00004560

  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

am2zzw00004561

  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

am2zzw00004562

  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

am2zzw00004563

  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

am2zzw00004564

  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

am2zzw00004565

  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

am2zzw00004566

  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

am2zzw00004567

  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

am2zzw00004568

  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

am2zzw00004569

  PCM terminals

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

  Oscilloscope setting

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

  Vehicle condition

  • Idle after warm-up