Electronic Control System (cont'd)
PCM Electrical Connections
PCM Inputs and Outputs
PCM CONNECTOR A (31P)

Terminal Number | Wire Color | Signal | Description | Measuring Conditions/Terminal Voltage
--- | --- | --- | --- | ---
A2 | YEL/BLK | IGP2 | Power supply circuit from PGM-FI main relay | With ignition switch ON (II): Battery voltage With ignition switch OFF: 0 V
A3 | YEL/BLK | IGP1 | Power supply circuit from PGM-FI main relay | With ignition switch ON (II): Battery voltage With ignition switch OFF: 0 V
A4 | BLK | PG2 | Ground | Less than 1.0 V at all times
A5 | BLK | PG1 | Ground | Less than 1.0 V at all times
A8 | BRN/YEL | LG2 | Ground | Less than 1.0 V at all times
A9 | BRN/YEL | LG1 | Ground | Less than 1.0 V at all times
A18 | BLK/BLU | NC | Output shaft (countershaft) speed sensor signal input | With ignition switch ON (II): 0 V or about 5 V While driving: About 1.5−3.5 V
A20 | YEL/BLU | VCC2 | Power supply circuit for sensors | With ignition switch ON (II): About 5 V With ignition switch OFF: 0 V
A21 | YEL/RED | VCC1 | Power supply circuit for sensors | With ignition switch ON (II): About 5 V With ignition switch OFF: 0 V
A23 | GRN/YEL | SG2 | Sensor ground | Less than 1.0 V at all times
A24 | GRN/WHT | SG1 | Sensor ground | Less than 1.0 V at all times
A30 | GRN/RED | MAP | Manifold absolute pressure (MAP) sensor signal input | With ignition switch ON (II): About 3 V At idle: About 1 V (depending on engine speed)