ECM/PCM Inputs and Outputs at Connector A (31P)
NOTE: Standard battery voltage is 12 V.

Terminal number | Wire color | Terminal name | Description | Signal
--- | --- | --- | --- | ---
1 | RED/BLU | KS (KNOCK SENSOR) | Detects knock sensor signal | With engine knocking: pulses
2 | YEL/BLK | IGP2 (POWER SOURCE) | Power source for ECM/PCM circuit | With ignition switch ON (II): battery voltage With ignition switch OFF: about 0 V
3 | YEL/BLK | IGP1 (POWER SOURCE) | Power source for ECM/PCM circuit | With ignition switch ON (II): battery voltage With ignition switch OFF: about 0 V
4 | BLK | PG2 (POWER GROUND) | Ground circuit for the ECM/PCM | Less than 1.0 V at all times
5 | BLK | PG1 (POWER GROUND) | Ground circuit for the ECM/PCM | Less than 1.0 V at all times
6 | GRN | CMPB (CAMSHAFT POSITION SENSOR B) | Detects CMP sensor B signal | With engine running: pulses With ignition switch ON (II): about 5 V
7 | BLU | CKP (CRANKSHAFT POSITION SENSOR) | Detects CKP sensor signal | With engine running: pulses With ignition switch ON (II): about 5 V
8 | BRN/YEL | LG2 (LOGIC GROUND) | Ground circuit for ECM/PCM | Less than 1.0 V at all times
9 | BRN/YEL | LG1 (LOGIC GROUND) | Ground circuit for ECM/PCM | Less than 1.0 V at all times
10 | GRN | AFSHTC (AIR FUEL RATIO (A/F) SENSOR HEATER CONTROL) | Drives A/F sensor heater | With ignition switch ON (II): battery voltage With fully warmed up engine running: about 0 V
12 *1 | BLK/RED | IACV (IDLE AIR CONTROL (IAC) VALVE) | Drives IAC valve | With engine running: duty controlled
13 | BRN | IGPLS4 (No. 4 IGNITION COIL PULSE) | Drives No. 4 ignition coil | With ignition switch ON (II): about 0 V With engine running: pulses
14 | WHT/BLU | IGPLS3 (No. 3 IGNITION COIL PULSE) | Drives No. 3 ignition coil
15 | BLU/RED | IGPLS2 (No. 2 IGNITION COIL PULSE) | Drives No. 2 ignition coil
16 | YEL/GRN | IGPLS1 (No. 1 IGNITION COIL PULSE) | Drives No. 1 ignition coil
18 | BLK/BLU | NC (COUNTERSHAFT SPEED SENSOR) | Detects countershaft speed sensor signal | With ignition switch ON (II): about 0 V or about 5 V While driving: about 2.5 V
19 | BLU/WHT | CMPA (CAMSHAFT POSITION SENSOR A) | Detects CMP sensor A signal | With engine running: pulses With ignition switch ON (II): about 5 V

*1: | K20A6 engine