Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1999 Chevrolet Camaro SS, 2D Convertible, AutomaticFACTORY OEM SERVICE PROCEDURE
Powertrain Control Module (Pcm) Connector Terminal Identification (3.8L - CAMARO & Firebird)
POWERTRAIN CONTROL MODULE (PCM) CONNECTOR TERMINAL IDENTIFICATION (3.8L - CAMARO & FIREBIRD) (1)
| Connector | Terminal No. | Wire Color | Function | ||
|---|---|---|---|---|---|
| C1 | 1 | ..... | Not Used | ||
| C1 | 2 | PPL/WHT | 2nd Gear Start Indicator (4L60E Only) | ||
| C1 | 3 | ..... | Not Used | ||
| C1 | 4 | LT GRN | 1-2 Shift Solenoid Control | ||
| C1 | 5 | DK BLU | Cooling Fan High Speed Control | ||
| C1 | 6 | DK GRN | Cooling Fan Low Speed Control | ||
| C1 | 7 | BLK | Camshaft Position Sensor Signal | ||
| C1 | 8 | PPL/WHT | Crankshaft Position 3x Sensor Reference | ||
| C1 | 9 | LT BLU/BLK | Crankshaft Position 18x Sensor Reference | ||
| C1 | 10 & 11 | ..... | Not Used | ||
| C1 | 12 | BRN | Engine Coolant Temperature Sensor Ground | ||
| C1 | 13 | ORG/BLK | Manifold Absolute Pressure Sensor Ground | ||
| C1 | 14 | ORG/BLK | TAC Serial Data | ||
| C1 | 15 | TAN | TAC Serial Data | ||
| C1 | 16 | BLK/WHT | Powertrain Control Module Ground | ||
| C1 | 17 | PPL | Intake Air Temperature Sensor Ground | ||
| C1 | 18 | ..... | Not Used | ||
| C1 | 19 | PNK | Ignition Positive Voltage | ||
| C1 | 20 | ORG | Battery Positive Voltage | ||
| C1 | 21 | ..... | Not Used | ||
| C1 | 22 | PNK | Transmission Range "A" Input (4L60E Only) | ||
| C1 | 23-26 | ..... | Not Used | ||
| C1 | 27 | TAN/WHT | Heated Oxygen Sensor No. 1 Signal Low (Bank No. 1) | ||
| C1 | 28 | GRY | Heated Oxygen Sensor No. 3 Signal Low (Bank No. 1) | ||
| C1 | 29 | TAN | Heated Oxygen Sensor No. 1 Signal Low (Bank No. 2) | ||
| C1 | 30 | PPL | Torque Converter Clutch Brake Switch Signal (4L60E Only) | ||
| C1 | 31 | BLK | Sensor Ground (EGR) | ||
| C1 | 32 | GRY | EGR Valve Ground | ||
| C1 | 33 | DK BLU | Bank No. 1 Knock Sensor Signal | ||
| C1 | 34 | LT BLU | Bank No. 2 Knock Sensor Signal | ||
| C1 | 35-42 | ..... | Not Used | ||
| C1 | 43 | YEL/BLK | Fuel Injector No. 6 Control | ||
| C1 | 44 | YEL/BLK | 2-3 Shift Solenoid Control (4L60E Only) | ||
| C1 | 45 | ..... | Not Used | ||
| C1 | 46 | LT BLU/BLK | Fuel Injector No. 4 Control | ||
| C1 | 47 | BLK/WHT | Fuel Injector No. 5 Control | ||
| C1 | 48 | RED/BLK | Reference Low | ||
| C1 | 49-52 | ..... | Not Used | ||
| C1 | 53 | TAN/BLK | By-Pass Valve Control | ||
| C1 | 54 | WHT | Ignition Control | ||
| C1 | 55 | DK GRN/WHT | Vehicle Speed Sensor Output | ||
| C1 | 56 | BLK/WHT | Powertrain Control Module Ground | ||
| C1 | 57 | BLK/WHT | Powertrain Control Module Ground | ||
| C1 | 58 | ..... | Not Used | ||
| C1 | 59 | DK GRN | Serial Data (Class II) | ||
| C1 | 60 | BLK/WHT | Powertrain Control Module Ground | ||
| C1 | 61-63 | ..... | Not Used | ||
| C1 | 64 | YEL | Vehicle Speed Sensor High | ||
| C1 | 65 | PPL | Vehicle Speed Sensor Low | ||
| C1 | 66-68 | ..... | Not Used | ||
| C1 | 69 | YEL | Mass Airflow Signal | ||
| C1 | 70 | DK BLU | Theft Deterrent Fuel Enable | ||
| C1 | 71 | ORG/BLK | Requested Torque Input | ||
| C1 | 72 | ..... | Not Used | ||
| C1 | 73 | LT GRN/BLK | Fuel Injector No. 2 Control | ||
| C1 | 74 & 75 | ..... | Not Used | ||
| C1 | 76 | DK GRN | EVAP Canister Purge Control | ||
| C1 | 77 & 78 | ..... | Not Used | ||
| C1 | 79 | BLK | Fuel Injector No. 1 Control | ||
| C1 | 80 | ..... | Not Used | ||
| C2 | 1 | ..... | Not Used | ||
| C2 | 2 | WHT | EVAP Canister Vent Valve Control | ||
| C2 | 3 | DK GRN/WHT | Fuel Pump Relay Control | ||
| C2 | 4 | LT BLU | EGR Valve Control | ||
| C2 | 5 | BRN/WHT | Malfunction Indicator Light Control | ||
| C2 | 6 & 7 | ..... | Not Used | ||
| C2 | 8 | WHT | Engine Speed Output | ||
| C2 | 9 | TAN/BLK | Delivered Torque Output | ||
| C2 | 10 | PPL | Heated Oxygen Sensor No. 1 Signal (Bank No. 2) | ||
| C2 | 11 | DK BLU | Heated Oxygen Sensor No. 3 Signal (Bank No. 1) | ||
| C2 | 12 | PPL/WHT | Heated Oxygen Sensor No. 1 Signal (Bank No. 1) | ||
| C2 | 13-15 | ..... | Not Used | ||
| C2 | 16 | ORG/BLK | Park Neutral Position Switch Signal | ||
| C2 | 17 | RED | Transmission Range "C" Input (4L60E Only) | ||
| C2 | 18 | GRY | Cruise Control/Clutch Anticipate Switch | ||
| C2 | 19 & 20 | ..... | Not Used | ||
| C2 | 21 | BRN/WHT | 2nd Gear Start Signal | ||
| C2 | 22 | DK GRN/WHT | A/C Request Signal | ||
| C2 | 23 | PPL/WHT | Crank Signal | ||
| C2 | 24 | BRN | Cruise Control Release Signal | ||
| C2 | 25 | LT GRN | Manifold Absolute Pressure Sensor Signal | ||
| C2 | 26 | YEL | Engine Coolant Temperature Sensor Signal | ||
| C2 | 27 | RED/BLK | A/C Refrigerant Pressure Sensor Signal | ||
| C2 | 28 | BRN | EGR Pintle Position Signal | ||
| C2 | 29-32 | ..... | Not Used | ||
| C2 | 33 | GRY | 5-Volt Reference "A" | ||
| C2 | 34 | LT BLU/BLK | 5-Volt Reference "B" | ||
| C2 | 35 | GRY | A/C Refrigerant Pressure Sensor Ground | ||
| C2 | 36-38 | ..... | Not Used | ||
| C2 | 39 | DK GRN/WHT | A/C Compressor Clutch Relay Control | ||
| C2 | 40 & 41 | ..... | Not Used | ||
| C2 | 42 | PNK/BLK | Fuel Injector No. 3 Control | ||
| C2 | 43 & 44 | ..... | Not Used | ||
| C2 | 45 | RED/BLK | Pressure Control Solenoid High (4L60E Only) | ||
| C2 | 46 | LT BLU/WHT | Pressure Control Solenoid Low (4L60E Only) | ||
| C2 | 47 | ..... | Not Used | ||
| C2 | 48 | WHT | 3-2 Shift Solenoid Control (4L60E Only) | ||
| C2 | 49 | ..... | Not Used | ||
| C2 | 50 | TAN | Intake Air Temperature Sensor Signal | ||
| C2 | 51-54 | ..... | Not Used | ||
| C2 | 55 | DK GRN | Fuel Tank Pressure Sensor Signal | ||
| C2 | 56 | ..... | Not Used | ||
| C2 | 57 | DK BLU | Transmission Range "B" Input (4L60E Only) | ||
| C2 | 58 | BRN | Engine Oil Level Sensor Signal | ||
| C2 | 59 & 60 | ..... | Not Used | ||
| C2 | 61 | RED | Generator Control | ||
| C2 | 62-67 | ..... | Not Used | ||
| C2 | 68 | YEL/BLK | Transaxle Fluid Temperature Sensor (4L60E Only) | ||
| C2 | 69 | PPL | Fuel Level Signal | ||
| C2 | 70-75 | ..... | Not Used | ||
| C2 | 76 | DK GRN | Starter Enable (If Equipped) | ||
| C2 | 77 | ..... | Not Used | ||
| C2 | 78 | BRN | TCC PWM Solenoid Control (4L60E Only) | ||
| C2 | 79 | TAN/BLK | TCC Enable Solenoid Control (4L60E Only) | ||
| C2 | 80 | ..... | Not Used | ||
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Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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