PCM inspection preparation
- Disconnect the negative battery cable.
- Remove the battery and battery tray. (See BATTERY REMOVAL/INSTALLATION [L3 WITH TC] .)
- Remove the windshield wiper arm and blade. (See WINDSHIELD WIPER ARM AND BLADE REMOVAL/INSTALLATION .)
- Remove the cowl grille. (See COWL GRILLE REMOVAL/INSTALLATION .)
- Remove the windshield wiper motor. (See WINDSHIELD WASHER MOTOR REMOVAL/INSTALLATION .)
- Remove the cowl panel. (See COWL PANEL REMOVAL/INSTALLATION .)
- Remove the PCM bracket with the PCM connector still connected. (See PCM REMOVAL/INSTALLATION .)
- Install the battery and battery tray. (See BATTERY REMOVAL/INSTALLATION [L3 WITH TC] .)
- Connect the negative battery cable.
PCM terminal voltage table (Reference)
PCM CONNECTOR TERMINALS REFERENCE CHART
| Terminal | Signal | Connected to | Test condition | Voltage (V) | Inspection item | |
|---|---|---|---|---|---|---|
| 1A | - | - | - | - | - | |
| 1B | Starter relay control | Starter relay | Ignition switch off after 10 s | Below 1.0 |
|
|
| Ignition switch to the ON position | Below 1.0 | |||||
| 1C | - | - | - | - | - | |
| 1D | - | - | - | - | - | |
| 1E | - | - | - | - | - | |
| 1F | - | - | - | - | - | |
| 1G | - | - | - | - | - | |
| 1H | Fuel pump control | Fuel pump relay | Ignition switch to the ON position after 10 s | B+ |
|
|
| Cranking | B+ | |||||
| Idle | Below 1.0 | |||||
| 1I | A/C | A/C relay | Idle | A/C operating | Below 1.0 |
|
| A/C not operating | B+ | |||||
| 1J | - | - | - | - | - | |
| 1K | - | - | - | - | - | |
| 1L | - | - | - | - | - | |
| 1M | IAT | MAF/IAT sensor | Ignition switch to the ON position | IAT 20°C {68°F} | 2.4-2.6 |
|
| IAT 30°C {86°F} | 1.7-1.9 | |||||
| 1N | Constant voltage (Vref) | Fuel tank pressure sensor | Switch the ignition to ON | Approx. 5.0 |
|
|
| 1O | - | - | - | - | - | |
| 1P | MAF sensor ground | MAF/IAT sensor | Under any condition | Below 1.0 |
|
|
| 1Q | APP sensor voltage | APP sensor | Ignition switch to the ON position | Approx. 5.0 |
|
|
| 1R | Fan control module (NO.2) | Fan control module NO.2 |
|
|
||
| 1S | - | - | - | - | - | |
| 1T | - | - | - | - | - | |
| 1U | APP sensor ground | APP sensor | Under any condition | Below 1.0 |
|
|
| 1V | - | - | - | - | - | |
| 1W | Cruise control switch ground | Cruise control switch | Under any condition | Below 1.0 |
|
|
| 1X | - | - | - | - | - | |
| 1Y | APP sensor (No.1) | APP sensor (NO.1) | Ignition switch to the ON position | When the accelerator pedal is released | 1.56-1.65 |
|
| When the accelerator pedal is depressed | 3.65-3.93 | |||||
| 1Z | - | - | - | - | - | |
| 1AA | Fuel pump speed control | Fuel pump speed control relay | Ignition switch to the ON position after 10 s | B+ |
|
|
| Cranking | Below 1.0 | |||||
| Idle | Below 1.0 | |||||
| 1AB | Brake (No.1) | Brake switch NO.1 | Brake pedal depressed | B+ |
|
|
| Brake pedal released | Below 1.0 | |||||
| 1AC | APP sensor (NO.2) | APP sensor (NO.2) | Ignition switch to the ON position | When the accelerator pedal is released | 1.01-1.10 |
|
| When the accelerator pedal is depressed | 3.10-3.38 | |||||
| 1AD | PSP | PSP switch | Idle | Steering wheel at straight ahead position | B+ |
|
| While turning steering wheel | Below 1.0 | |||||
| 1AE | Fan control module (NO.1) | Fan control module NO.1 |
|
|
||
| 1AF | Brake (NO.2) | Brake switch NO.2 | Brake pedal depressed | B+ |
|
|
| Brake pedal released | Below 1.0 | |||||
| 1AG | Fuel tank pressure | Fuel tank pressure sensor | Fuel tank pressure is 10 kPa {0.10 kgf/cm2, 1.5 psi} lower than barometric pressure | Approx. 1.2 |
|
|
| Fuel tank pressure is equal to barometric pressure | Approx. 2.6 | |||||
| Fuel tank pressure is 6 kPa {0.06 kgf/cm2, 0.9 psi} higher than barometric pressure | Approx. 3.7 | |||||
| 1AH | - | - | - | - | - | |
| 1AI | CAN (L) | CAN system related modules | Because this terminal is for CAN, no valid determination of terminal voltage is possible |
|
||
| 1AJ | Constant voltage | APP sensor | Ignition switch to the ON position | Approx. 5.0 |
|
|
| 1AK | MAF | MAF/IAT sensor | Ignition switch to the ON position | Approx. 0.7 |
|
|
| Idle | Approx. 1.3 | |||||
| 1AL | - | - | - | - | - | |
| 1AM | CAN (H) | CAN system related modules | Because this terminal is for CAN, no valid determination of terminal voltage is possible |
|
||
| 1AN | - | - | - | - | - | |
| 1AO | Cooling fan control | Cooling fan relay NO.1/NO.2 | Cooling fan relay NO.1/NO.2 operating | Below 1.0 |
|
|
| Cooling fan relay NO.1/NO.2 not operating | B+ | |||||
| 1AP | - | - | - | - | - | |
| 1AQ | Cruise control switch | Cruise control switch | Ignition switch to the ON position | ON/OFF switch pressed in | Approx. 0 |
|
| CANCEL switch pressed in | Approx. 1.1 | |||||
| SET/- switch pressed in | Approx. 3.1 | |||||
| RES/+ switch pressed in | Approx. 4.2 | |||||
| Except above | Approx. 5.0 | |||||
| 1AR | IAT sensor ground | MAF/IAT sensor | Under any condition | Below 1.0 |
|
|
| 1AS | CV solenoid control | CV solenoid valve | Switch the ignition to ON | B+ |
|
|
| Idle (CV solenoid valve not operating) | B+ | |||||
| Idle (CV solenoid valve operating) | Below 1.0 | |||||
| 1AT | Main relay control | Main relay | Ignition switch off after 10 s | B+ |
|
|
| Ignition switch to the ON position | Below 1.0 | |||||
| 1AU | - | - | - | - | - | |
| 1AV | APP sensor ground | APP sensor | Under any condition | Below 1.0 |
|
|
| 1AW | Generator field coil control | Generator (terminal D) |
|
|
||
| 1AX | Generator output voltage | Generator (terminal P) |
|
|
||
| 1AY | Ignition switch | Ignition switch | Ignition switch off | Below 1.0 |
|
|
| Ignition switch to the ON position | B+ | |||||
| 1AZ | Ground | Ground | Under any condition | Below 1.0 |
|
|
| 1BA | Back-up power supply | Battery (positive terminal) | Under any condition | B+ |
|
|
| 1BB | Ground | Ground | Under any condition | Below 1.0 |
|
|
| 1BC | - | - | - | - | - | |
| 1BD | Ground | Ground | Under any condition | Below 1.0 |
|
|
| 1BE | Power supply | Main relay | Ignition switch off after 10 s | Below 1.0 |
|
|
| Ignition switch to the ON position | B+ | |||||
| 1BF | Power supply | Main relay | Ignition switch off after 10 s | Below 1.0 |
|
|
| Ignition switch to the ON position | B+ | |||||
| 1BG | Ground | Ground | Under any condition | Below 1.0 |
|
|
| 1BH | Ground | Ground | Under any condition | Below 1.0 |
|
|
| 2A | Throttle valve actuator control (+) | Throttle body (throttle valve actuator) | Ignition switch off | Approx. 1.5 |
|
|
| Ignition switch to the ON position | B+ | |||||
| 2B | Throttle valve actuator control (-) | Throttle body (throttle valve actuator) | Ignition switch off | Approx. 1.5 |
|
|
| Ignition switch to the ON position | B+ | |||||
| 2C | A/F sensor heater control | A/F sensor heater |
|
|
||
| 2D | HO2S heater control | HO2S heater |
|
B+ |
|
|
| 2E | Variable swirl solenoid valve power supply | Main relay, variable swirl solenoid valve, CMP sensor | Ignition switch off after 10 s | Below 1.0 |
|
|
| Ignition switch to the ON position | B+ | |||||
| 2F | High pressure fuel pump control (+) | High pressure fuel pump (Spill valve control solenoid valve) | Ignition switch off | Below 1.0 |
|
|
| Ignition switch to the ON position | Approx. 9.7 | |||||
| Idle | Approx. 9.4 | |||||
| 2G | High pressure fuel pump control (-) | High pressure fuel pump (Spill valve control solenoid valve) | Ignition switch off | Below 1.0 |
|
|
| Ignition switch to the ON position | Approx. 9.6 | |||||
| Idle | Approx. 8.6 | |||||
| 2H | Ground | Body ground | Under any condition | Below 1.0 |
|
|
| 2I | Sensor ground | HO2S | Under any condition | Below 1.0 |
|
|
| 2J | - | - | - | - | - | |
| 2K | Constant voltage (Vref) | Fuel pressure sensor | Ignition switch to the ON position | Approx. 5.0 |
|
|
| 2L | - | - | - | - | - | |
| 2M | Sensor ground | A/F sensor | Under any condition | Below 1.0 |
|
|
| 2N | Boost air temperature | MAP/boost air temperature sensor | Ignition switch to the ON position | IAT 20°C {68°F} | 2.4-2.6 |
|
| IAT 30°C {86°F} | 1.7-1.9 | |||||
| 2O | OCV control | OCV | Switch the ignition to ON | B+ |
|
|
| 2P | Sensor ground | Fuel pressure sensor | Under any condition | Below 1.0 |
|
|
| 2Q | HO2S | HO2S | Idle | 0-1 |
|
|
| 2R | Fuel pressure sensor | Fuel pressure sensor | Ignition switch off | Below 1.0 |
|
|
| Ignition switch to the ON position | Approx. 1.1 | |||||
| Idle | Approx. 1.7 | |||||
| 2S | CMP | CMP sensor |
|
|
||
| 2T | - | - | - | - | - | |
| 2U | Knocking (+) | KS | Ignition switch to the ON position (Use digital type voltmeter, because measurement voltage will be detected less than true voltage when using analog type voltmeter) | Approx. 4.3 |
|
|
| 2V | Knocking (-) | KS | Ignition switch to the ON position (Use digital type voltmeter, because measurement voltage will be detected less than true voltage when using analog type voltmeter) | Below 1.0 |
|
|
| 2W | CKP | CKP sensor |
|
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| 2X | Internal ground | KS, CMP sensor, CKP sensor, A/F sensor, variable swirl solenoid valve, TP sensor | Under any condition | Below 1.0 |
|
|
| 2Y | A/F sensor calibration resistor | A/F sensor | Ignition switch off after 10s | Below 1.0 |
|
|
| Ignition switch to the ON position | Approx. 3.9 | |||||
| 2Z | A/F sensor power supply | A/F sensor | Idle (after warm up) | Approx. 6.2 |
|
|
| 2AA | Wastegate control solenoid valve | Wastegate control solenoid valve |
|
|
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| 2AB | Purge solenoid valve | Purge solenoid valve |
|
|
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| 2AC | A/F sensor VSIP | A/F sensor | Idle (after warm up) | Approx. 3.7 |
|
|
| 2AD | A/F sensor IP+ | A/F sensor | Idle (after warm up) | Approx. 3.7 |
|
|
| After racing | 2.1-4.8 | |||||
| 2AE | Variable swirl shutter valve monitor | Variable swirl shutter valve switch | variable swirl shutter valve close | Below 1.0 |
|
|
| variable swirl shutter valve open | B+ | |||||
| 2AF | OCV control | OCV |
|
|
||
| 2AG | Manifold absolute pressure | MAP sensor | Ignition switch to the ON position) | Approx. 1.9 |
|
|
| Idle (after warm up) | Below 1.0 | |||||
| 2AH | ECT | ECT sensor | Ignition switch to the ON position | ECT 20°C {68°F} | 3.04-3.14 |
|
| ECT 60°C {140°F} | 1.29-1.39 | |||||
| 2AI | - | - | - | - | - | |
| 2AJ | TP sensor ground | TP sensor | Under any condition | Below 1.0 |
|
|
| 2AK | TP sensor (No.1) | TP sensor (No.1) |
NOTE:
|
|
||
| Ignition switch to the ON position (after warm up) | APP is released | Approx. 0.7 | ||||
| APP is depressed | Approx. 0.7 | |||||
| 2AL | TP sensor (No.2) | TP sensor (No.2) |
NOTE:
|
|
||
| Ignition switch to the ON position (after warm up) | APP is released | Approx. 4.3 | ||||
| APP is depressed | Approx. 4.3 | |||||
| 2AM | EGR valve #3 coil control | EGR valve (terminal A) | Ignition switch to the ON position | B+ |
|
|
| Ignition switch off | Below 1.0 | |||||
| 2AN | EGR valve #6 coil control | EGR valve (terminal F) | Ignition switch to the ON position | B+ |
|
|
| Idle | B+ | |||||
| 2AO | Constant voltage (Vref) | TP sensor | Ignition switch to the ON position | Approx. 5.0 |
|
|
| 2AP | - | - | - | - | - | |
| 2AQ | EGR valve #1 coil control | EGR valve (terminal E) | Ignition switch to the ON position | Below 1.0 |
|
|
| Idle | Below 1.0 | |||||
| 2AR | EGR valve #4 coil control | EGR valve (terminal B) | Ignition switch to the ON position | B+ |
|
|
| Ignition switch off | Below 1.0 | |||||
| 2AS | Variable swirl control | Variable swirl solenoid valve | ECT 60°C {140°F} or more or engine speed 3,250 rpm or more | B+ |
|
|
| ECT less than 60°C {140°F} and engine speed less than 3,250 rpm | Below 1.0 | |||||
| 2AT | IGT4 | Ignition coil (NO.4 cylinders) |
|
|
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| 2AU | Constant voltage (Vref) | MAP sensor | Ignition switch to the ON position | Approx. 5.0 |
|
|
| 2AV | Sensor ground | MAP sensor | Under any condition | Below 1.0 |
|
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| 2AW | IGT2 | Ignition coil (NO.2 cylinders) |
|
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| 2AX | IGT3 | Ignition coil (NO.3 cylinders) |
|
|
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| 2AY | Sensor ground | ECT sensor | Under any condition | Below 1.0 |
|
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| 2AZ | Fuel injection (-)(#4) | Fuel injector (NO.4) |
|
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| 2BA | IGT1 | Ignition coil (NO.1 cylinders) |
|
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| 2BB | Fuel injection B(#1) | Fuel injector (NO.1) |
|
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| 2BC | Fuel injection B(#2) | Fuel injector (NO.2) |
|
|
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| 2BD | Fuel injection B(#3) | Fuel injector (NO.3) |
|
|
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| 2BE | Fuel injector power supply 1 | Fuel Injector relay | Ignition switch off | Below 1.0 |
|
|
| Ignition switch to the ON position | B+ | |||||
| 2BF | Fuel injector power supply 2 | Fuel Injector relay | Ignition switch off | Below 1.0 |
|
|
| Ignition switch to the ON position | B+ | |||||
| 2BG | Fuel injection (+)(#1,#4) | Fuel injector (No.1, NO.4) |
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| 2BH | Fuel injection (+)(#2, #3) | Fuel injector (NO.2, NO.3) |
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