PCM Inputs and Outputs at Connector E (31P)
NOTE:
Standard battery voltage is 12 V.
CONNECTOR E (31P) TERMINALS REFERENCE
| Terminal number | Wire color | Terminal name | Description | Signal |
|---|---|---|---|---|
| 1 | GRN/YEL | IMOFPR (IMMOBILIZER FUEL PUMP RELAY) | Drives PGM-FI main relay 2 | 0 V for 2 seconds after turning ignition switch ON (II), then battery voltage |
| 3 | BRN/YEL | LG3 (LOGIC GROUND) | Ground for the PCM control circuit | Less than 1.0 V at all times |
| 4 | PNK | SG3 (SENSOR GROUND) | Sensor ground | Less than 1.0 V at all times |
| 5 | YEL/BLU | VCC3 (SENSOR VOLTAGE) | Provides sensor voltage | With ignition switch ON (II): about 5 V With ignition switch OFF: about 0 V |
| 7 | RED/YEL | MRLY (PGM-FI MAIN RELAY) | Drives PGM-FI main relay 1 power source for the DTC memory | With ignition switch ON (II): about 0 V With ignition switch OFF: battery voltage |
| 9 | YEL/BLK | IG1 (IGNITION SIGNAL) | Detects ignition signal | With ignition switch ON (II): battery voltage With ignition switch OFF: about 0 V |
| 12 | BLU/ORN | CCS (CRUISE CONTROL SIGNAL) | Detects cruise control signal | When cruise control is used and accelerator pedal released: pulses |
| 13 | WHT/BLU | ILU (INTERLOCK CONTROL UNIT) | Drives interlock control unit | With ignition switch ON (II) and brake pedal pressed: battery voltage |
| 14 | LT GRN | PF2 (FUEL PRESSURE SENSOR) | Detects fuel pressure sensor signal | At idle: 2.3-3.0 V (depending on engine speed) |
| 15 | GRN/RED | ELD (ELECTRICAL LOAD DETECTOR (ELD)) | Detects ELD signal | With ignition switch ON (II): about 0.1-4.8 V (depending on electrical load) |
| 16 | LT GRN/BLK | PSPSW (POWER STEERING PRESSURE SWITCH SIGNAL) | Detects PSP switch signal | At idle with steering wheel in straight ahead position: 0 V At idle with steering wheel at full lock: battery voltage |
| 17 | BLU/RED | TF2 (FUEL TEMPERATURE SENSOR) | Detects fuel temperature sensor signal | With ignition switch ON (II): about 0.1-4.8 V (depending on fuel temperature) |
| 18 | RED | ACC (A/C CLUTCH RELAY) | Drives A/C clutch relay | With compressor ON: about 0 V With compressor OFF: battery voltage |
| 19 | ORN | PF0 (FUEL TANK PRESSURE (FTP) SENSOR) | Detects FTP sensor signal | With ignition switch ON (II): about 0.5-4.5 V (depending on the amount of fuel) |
| 20 | GRN | STSWC (STARTER SWITCH SIGNAL CONTROL) | Drives starter control relay | 0 V for 2 seconds after turning ignition switch ON (II), then battery voltage (intake air and/or fuel temperature below 0 °C) |
| 21 | LT GRN/RED | TF0 (FUEL TANK TEMPERATURE (FTT) SENSOR) | Detects FTT sensor signal | With ignition switch ON (II): about 0.1-4.8 V (depending on fuel temperature) |
| 22 | WHT/BLK | BKSW (BRAKE PEDAL POSITION SWITCH) | Detects brake pedal position switch signal | With brake pedal released: about 0 V With brake pedal pressed: battery voltage |
| 23 | LT BLU | K-LINE | Sends and receives HDS or scan tool signal | With ignition switch ON (II): pulses or battery voltage |
| 24 | YEL | SEFMJ | Communicates with multiplex control unit | With ignition switch ON (II): about 5 V With engine running under load: pulses |
| 25 | BLU/WHT | VSSOUT (VEHICLE SPEED SIGNAL OUTPUT) | Sends vehicle speed signal | With ignition switch ON (II) and front wheels rotating: cycles about 0 V to 5 V or battery voltage |
| 26 | BLU | NEP (ENGINE SPEED PULSE) | Outputs engine speed pulse | With engine running: pulses |
| 27 | RED/BLU | IMOCD (IMMOBILIZER CODE) | Detects immobilizer signal | |
| 28 | PUR | P1SW (FUEL PRESSURE REGULATOR SWITCH) | Detects fuel pressure regulator switch signal | With ignition switch ON (II): about 0 V |
| 29 | BRN | SCS (SERVICE CHECK SIGNAL) | Detects service check signal | With the service check signal shorted with the PGM Tester: about 0 V With the service check signal opened: about 5 V |
| 30 | RED/WHT | WEN (WRITE ENABLE SIGNAL) | Detects write enable signal | With ignition switch ON (II): about 0 V |
| 31 | GRN/ORN | MIL (MALFUNCTION INDICATOR LAMP) | Drives MIL | With MIL turned ON: about 0 V With MIL turned OFF: battery voltage |