For 1990-2009 cars

Table 1: | Back View Of the PCM Connector C1 (Manual and 3-Speed A/T Only)
Table 2: | Back View Of the PCM Connector C2 (Manual and 3-Speed A/T Only)
Table 3: | Back View Of the PCM Connector C3 (Manual and 3-Speed A/T Only)
Table 4: | Back View Of the PCM Connector C1 (4-Speed AT only)
Table 5: | Back View Of the PCM Connector C2 (4-Speed AT only)
Table 6: | Back View Of the PCM Connector C3 (4-Speed AT only)
Table 7: | Back View Of the PCM Connector C4 (4-Speed AT only)

#### Back View Of the PCM Connector C1 (Manual and 3-Speed A/T Only)

Connector Part Information | 3-Speed AT and Manual Transmission only 26 Pin GRY Connector C1
--- | ---
Pin | Wire Color | Function
C1-1 | RED | Camshaft Position (CMP) Actuator Solenoid Valve Control Low
C1-2 | BLK | Camshaft Position (CMP) Actuator Solenoid Valve Control High
C1-3 | BLU/YEL | Ignition Fail Safe Input
C1-4 | RED | EVAP Pressure Switching Solenoid Control
C1-5 | BLU/BLK | EVAP Canister Vent Solenoid Valve Control
C1-6 | -- | Not Used
C1-7 | BLU/BLK | EVAP Canister Purge Solenoid Valve Control
C1-8 | BLU/RED | Power Steering Pressure (PSP) Switch
C1-9 | LT GRN | AC Condenser Fan Control
C1-10 | -- | Not Used
C1-11 | BLK/RED | Fuel Injector 2 Control
C1-12 | YEL | Fuel Injector 1 Control
C1-13 | BRN | Ground
C1-14 | BRN | Ground
C1-15 | BLK/BLU | Idle Air Control (IAC) Valve Control Circuit
C1-16 | YEL/BLU | Fuel Pump Cut-Off Signal (SIR SDM)
C1-17 | BLU | Fuel Tank Pressure Sensor Input
C1-18 | BLK | Knock Sensor (KS) Input
C1-19 | -- | Not Used
C1-20 | RED/BLU | Ignition Trigger Signal Coil 1
C1-21 | YEL/GRN | Ignition Trigger Signal Coil 2
C1-22 | GRY | Ignition Trigger Signal Coil 3
C1-23 | WHT | Ignition Trigger Signal Coil 4
C1-24 | BLK | Fuel Injector 4 Control
C1-25 | WHT | Fuel Injector 3 Control
C1-26 | BRN | Ground

#### Back View Of the PCM Connector C2 (Manual and 3-Speed A/T Only)

Connector Part Information | 3-Speed AT and Manual Transmission only 16 Pin GRY Connector C2
--- | ---
Pin | Wire Color | Function
C2-1 | YEL | Reference Voltage
C2-2 | GRN | Mass Air Flow (MAF) Sensor Signal High
C2-3 | YEL/BLK | Intake air Temperature (IAT) Sensor Input
C2-4 | WHT | Engine Coolant Temperature (ECT) Sensor Input
C2-5 | BLK | Crankshaft Position (CKP) Sensor Input
C2-6 | WHT | Heated Oxygen Sensor (HO2S) 1 Input
C2-7 | PNK | Heated Oxygen Sensor (HO2S) 1 Heater Circuit Control
C2-8 | BRN | Ground
C2-9 | BRN | Sensor Ground
C2-10 | BLU/WHT | Mass Air Flow (MAF) Sensor Signal Low
C2-11 | LT GRN | Throttle Position (TP) Sensor Input
C2-12 | BLK | Camshaft Position Sensor (CMP) Sensor Input
C2-13 | WHT | CMP Sensor and CKP Sensor Ground
C2-14 | RED | Heated Oxygen Sensor (HO2S) 2 Input
C2-15 | PNK | Heated Oxygen Sensor (HO2S) 2 Heater Circuit Control
C2-16 | -- | Not Used

#### Back View Of the PCM Connector C3 (Manual and 3-Speed A/T Only)

Connector Part Information | 3-Speed AT and Manual Transmission only 22 Pin GRY Connector C3
--- | ---
Pin | Wire Color | Function
C3-1 | RED/WHT | Battery Voltage
C3-2 | BLK | Electrical Load Idle-up Signal from Defogger
C3-3 | GRN | Electrical Load Idle-up Signal from Taillights
C3-4 | -- | Not Used
C3-5 | RED/YEL | Malfunction Indicator Light (MIL) Control
C3-6 | BLU/WHT | Data Link Connector (Underhood) Diagnostic Request
C3-7 | BLU/WHT | Cruise Control Idle
C3-8 | -- | Not Used
C3-9 | PPL/WHT | Vehicle Speed Sensor (VSS) Input
C3-10 | YEL/RED | AC On Signal
C3-11 | BLK/WHT | Crank Signal
C3-12 | BLK | Ignition Positive Voltage
C3-13 | BLK | Engine Speed Output for Tachometer
C3-14 | GRN/RED | Circuit Opening Relay Control
C3-15 to C3-16 | -- | Not Used
C3-17 | WHT | Data Link Connector (DLC) Serial Data Line
C3-18 to C3-20 | -- | Not Used
C3-21 | RED/BLU | AC Cutout Control
C3-22 | BLU/BLK | Cooling Fan Control

#### Back View Of the PCM Connector C1 (4-Speed AT only)

Connector Part Information | 4-Speed AT only 31 Pin WHT Connector C1
--- | ---
Pin | Wire Color | Function
C1-1 | YEL | Fuel Injector 1 Control
C1-2 | BLK/RED | Fuel Injector 2 Control
C1-3 | WHT | Fuel Injector 3 Control
C1-4 | BLK | Fuel Injector 4 Control
C1-5 to C1-7 | -- | Not Used
C1-8 | PPL | Shift Solenoid 1 Control
C1-9 | -- | Not Used
C1-10 | RED/BLU | Ignition Trigger Signal Coil 1
C1-11 | YEL/GRN | Ignition Trigger Signal Coil 2
C1-12 | GRY | Ignition Trigger Signal Coil 3
C1-13 | WHT | Ignition Trigger Signal Coil 4
C1-14 to C1-16 | -- | Not Used
C1-17 | BLU/BLK | EVAP Canister Vent Solenoid Valve Control
C1-18 | BLK/BLU | Idle Air Control (IAC) Valve Control
C1-19 | BLU/YEL | Torque Converter Clutch (TCC) Solenoid Control
C1-20 | BRN/YEL | Shift Solenoid 2 Control
C1-21 | BRN | Ground
C1-22 | RED | EVAP Pressure Switching Solenoid Control
C1-23 | RED | Camshaft Position (CMP) Actuator Solenoid Valve Control Low
C1-24 | BLK | Camshaft Position (CMP) Actuator Solenoid Valve Control High
C1-25 | BLU/YEL | Ignition Fail Safe Input
C1-26 | -- | Not Used
C1-27 | BLK | Knock Sensor (KS) Input
C1-28 | LT GRN | AC Condenser Fan Control
C1-29 to C1-30 | -- | Not Used
C1-31 | BRN | Ground

#### Back View Of the PCM Connector C2 (4-Speed AT only)

Connector Part Information | 4-Speed AT only 24 Pin WHT Connector C2
--- | ---
Pin | Wire Color | Function
C2-1 | BLU/WHT | Mass Air Flow (MAF) Sensor Signal Low
C2-2 | YEL | Throttle Position (TP) Sensor Ground
C2-3 | PNK | Heated Oxygen Sensor (HO2S) 1 Heater Circuit Control
C2-4 | BLU/BLK | EVAP Canister Purge Solenoid Valve Control
C2-5 | -- | Not Used
C2-6 | PNK | Heated Oxygen Sensor (HO2S) 2 Heater Circuit Control
C2-7 | BLU/BLK | AC Cooling Fan Relay Control
C2-8 | BRN | Ground
C2-9 | BLU | Fuel Tank Pressure Sensor Input
C2-10 | -- | Not Used
C2-11 | GRN | Mass Air Flow (MAF) Sensor Signal High
C2-12 | WHT | Heated Oxygen Sensor (HO2S) 1 Input
C2-13 | -- | Not Used
C2-14 | WHT | Engine Coolant Temperature (ECT) Sensor Signal
C2-15 | BLK | Camshaft Position (CMP) Sensor Input
C2-16 | BLK | Crankshaft Position (CKP) Sensor Input
C2-17 | BRN | Ground
C2-18 | BRN | Sensor Ground
C2-19 | -- | Not Used
C2-20 | RED | Heated Oxygen Sensor (HO2S) 2 Input
C2-21 | -- | Not Used
C2-22 | YEL/BLK | Intake Air Temperature (IAT) Sensor Input
C2-23 | LT GRN | Throttle Position (TP) Sensor Input
C2-24 | WHT | CMP Sensor and CKP Sensor Ground

#### Back View Of the PCM Connector C3 (4-Speed AT only)

Connector Part Information | 4-Speed AT only 28 Pin WHT Connector C3
--- | ---
Pin | Wire Color | Function
C3-1 | RED/WHT | Over-Drive (OD) Cut Signal
C3-2 | RED/BLK | Park Neutral Position (PNP) Switch Position R Signal
C3-3 | LT GRN/RED | Park Neutral Position (PNP) Switch Position 2 Signal
C3-4 | LT GRN | OD Switch ON and OFF Signal
C3-5 | BLU/WHT | Data Link Connector (Underhood) Diagnostic Request
C3-6 | GRN/WHT | Brake Switch Signal
C3-7 | -- | Not Used
C3-8 | YEL/BLU | Fuel Pump Cut-Off Signal (SIR SDM)
C3-9 | -- | Not Used
C3-10 | BLK | Electrical Load Idle-Up Signal
C3-11 | BLK/WHT | Crank Signal
C3-12 | LT GRN/BLK | Park Neutral Position (PNP) Switch Low Signal
C3-13 | BLK/WHT | Ignition Positive Voltage
C3-14 | BLU/RED | Power Steering Pressure (PSP) Switch Signal
C3-15 to C3-18 | -- | Not Used
C3-19 | LT GRN/BLU | OD Indicator Control
C3-20 | GRN | Electrical Load Idle-Up Signal
C3-21 | -- | Not Used
C3-22 | PPL/WHT | Vehicle Speed Sensor (VSS) Input
C3-23 to C3-26 | -- | Not Used
C3-27 | BLK | Speed Sensor Signal
C3-28 | -- | Not Used

#### Back View Of the PCM Connector C4 (4-Speed AT only)

Connector Part Information | 4-Speed AT only 22 Pin WHT Connector C4
--- | ---
Pin | Wire Color | Function
C4-1 | RED/WHT | Battery Positive Voltage
C4-2 | -- | Not Used
C4-3 | GRN/RED | Circuit Opening Relay Control
C4-4 to C4-9 | -- | Not Used
C4-10 | BLU/WHT | Idle Signal to Cruise Control
C4-11 | WHT | Data Link Connector (DLC) Serial Data Line
C4-12 | RED/BLU | AC Cut-Off Control
C4-13 to C4-14 | -- | Not Used
C4-15 | RED/YEL | MIL Control
C4-16 | BLK | Ignition Positive Voltage
C4-17 | -- | Not Used
C4-18 | YEL/RED | AC ON Signal
C4-19 to C4-22 | -- | Not Used