## Fuel and Emissions Systems

#### System Descriptions (cont'd)

11-18

ECM/PCM Inputs and Outputs at Connector E (31P)

Wire side of female terminals

NOTE: Standard battery voltage is 12 V.

Terminal number | Wire colour | Terminal name | Description | Signal
1 | GRN/YEL | IMO FPR (IMMOBILIZER FUEL PUMP RELAY) | Drives PGM-FI main relay 2 | 0 V for 2 seconds after turning ignition switch ON (II), then battery voltage
2 | WHT/RED | SHO2S (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S), SENSOR 2) | Detects secondary HO2S (sensor 2) signal | With throttle fully opened from idle with fully warmed up engine: above 0.6 V With throttle quickly closed: below 0.4 V
3 | BRN/YEL | LG3 (LOGIC GROUND) | Ground for the ECM/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
6 | BLK/WHT | SO2SHTC (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) HEATER CONTROL) | Drives secondary HO2S heater | With ignition switch ON (II): battery voltage With fully warmed up engine running: duty controlled
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
16 | LT GRN/BLK | EPSLD (ELECTRICAL POWER STEERING LOAD DETECT) | Detects power steering load signal | At idle with steering wheel in straight ahead position: about 0 V At idle with steering wheel at full lock: battery voltage momentarily
18 | RED | ACC (A/C CLUTCH RELAY) | Drives A/C clutch relay | With compressor ON: about 0 V With compressor OFF: battery voltage
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 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
26 | BLU | NEP (ENGINE SPEED PULSE) | Outputs engine speed pulse | With engine running: pulses
27 | RED/BLU | IMOCD (IMMOBILIZER CODE) | Detects immobiliser signal |
29 | BRN | SCS (SERVICE CHECK SIGNAL) | Detects service check signal | With the service check signal shorted: about 0 V With the service check signal opened: about 5 V battery voltage
31 | GRN/ORN | MIL (MALFUNCTION INDICATOR LAMP) | Drives MIL | With MIL turned ON: about 0 V With MIL turned OFF: battery voltage

*1: D16W7, D16V1 engines

*2: A/T