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.
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HOMESERVICE MANUALSCHEVROLET1992LUMINA APV V6-3800 3.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTDIAGRAMSELECTRICAL DIAGRAMSELECTRONIC/POWERTRAIN CONTROL MODULE (ECM/PCM)
1992 Chevrolet Lumina APV V6-3800 3.8L
Electronic/Powertrain Control Module (ECM/PCM)
1992 Chevrolet Lumina APV V6-3800 3.8LSECTION Electronic/Powertrain Control Module (ECM/PCM)
NOTE: The first character of each PCM pin number in the following diagrams indicates the color of the connector (B - BLACK; G- GREEN).
Part 1 of 3
PIN # - CIRCUIT
BB4 - Battery
BA4 - Battery
BC13 - Injector Ground
BD13 - Injector Ground
BA6 - PCM Ground
BD11 - A/C Request
GC2 - A/C Relay (compressor clutch)
BC1 - Cruise Control Vent Solenoid
BA10 - SPS High
BA9 - SPS Low
BC3 - Cruise Control Vacuum Solenoid
BD10 - Cruise Control Brake Signal (Cruise "OFF")
GD2 - Cruise Control "ON" - "OFF"
GD3 - Cruise Control "SET/COAST"
GD4 - Cruise Control "RESUME/ACCL"
GC4 - Low Speed Fan (Fan #1)
BD9 - A/C Head Pressure Switch
GC3 - High Speed Fan (Fan #2)
Part 2 of 3
PIN # - CIRCUIT
BC15 - Injector #1
BD16 - Injector #2
BC12 - Injector #3
BC14 - Injector #4
BC16 - Injector #5
BD15 - Injector #6
BB8 - Knock Sensor (ESC)
GC5 - Canister Purge
BD14 - Ignition #1 (ign. "ON")
BD14 - Mass Air Flow Sensor (MAF)
GC14 - Idle Air Control Valve (IAC-B-High)
GC13 - Idle Air Control Valve (IAC-B-Low)
GC11 - Idle Air Control Valve (IAC-A-High)
GC12 - Idle Air Control Valve (IAC-A-Low)
BC7 - Electronic Spark Timing (EST)
BC11 - Fuel Control
BC8 - Reference Low
BA12 - Cam Signal
BC6 - Bypass (EST)
GD6 - Spark Reference
Part 3 of 3
PIN # - CIRCUIT
BB9 - Coolant Temperature Sensor
BA8 - Sensor Ground
BB10 - Throttle Position Sensor Signal
BB3 - +5 Volt Reference
BB7 - Intake Air Temperature Sensor Signal
BA7 - Sensor Ground
BD3 - Oxygen Sensor Signal
BD2 - Oxygen Sensor Signal Ground
BB6 - Ground
GC15 - [1][2]Torque Converter Clutch - Pulse Width Modulated (TCC-PWM) Solenoid
GD16 - Shift Solenoid "A"
GD15 - Shift Solenoid "B"
GC6 - [1][2]Torque Converter Clutch Apply Solenoid
BA5 - Brake Switch Input (TCC - "OFF")
GD7 - 4 K/M Speed output (to Speedo)
BB11 - Diagnostic lead (ALDL)
GC1 - Service Engine Soon (SES) Light
BC2 - Serial Data (ALDL)
GD14 - Vehicle Speed Sensor (high)
GD13 - Vehicle Speed Sensor (low)
BD8 - PRNDL "A"
BD7 - PRNDL "B"
BD6 - PRNDL "C"
BD5 - PRNDL "P"
BC4 - Fuel Pump Relay
Engine Management Wiring Diagram (1 Of 3):
Part 1 of 3
PIN # - CIRCUIT
BB4 - Battery
BA4 - Battery
BC13 - Injector Ground
BD13 - Injector Ground
BA6 - PCM Ground
BD11 - A/C Request
GC2 - A/C Relay (compressor clutch)
BC1 - Cruise Control Vent Solenoid
BA10 - SPS High
BA9 - SPS Low
BC3 - Cruise Control Vacuum Solenoid
BD10 - Cruise Control Brake Signal (Cruise "OFF")
GD2 - Cruise Control "ON" - "OFF"
GD3 - Cruise Control "SET/COAST"
GD4 - Cruise Control "RESUME/ACCL"
GC4 - Low Speed Fan (Fan #1)
BD9 - A/C Head Pressure Switch
GC3 - High Speed Fan (Fan #2)
Engine Management Wiring Diagram (2 Of 3):
Part 2 of 3
PIN # - CIRCUIT
BC15 - Injector #1
BD16 - Injector #2
BC12 - Injector #3
BC14 - Injector #4
BC16 - Injector #5
BD15 - Injector #6
BB8 - Knock Sensor (ESC)
GC5 - Canister Purge
BD14 - Ignition #1 (ign. "ON")
BD14 - Mass Air Flow Sensor (MAF)
GC14 - Idle Air Control Valve (IAC-B-High)
GC13 - Idle Air Control Valve (IAC-B-Low)
GC11 - Idle Air Control Valve (IAC-A-High)
GC12 - Idle Air Control Valve (IAC-A-Low)
BC7 - Electronic Spark Timing (EST)
BC11 - Fuel Control
BC8 - Reference Low
BA12 - Cam Signal
BC6 - Bypass (EST)
GD6 - Spark Reference
Engine Management Wiring Diagram (3 Of 3):
Part 3 of 3
PIN # - CIRCUIT
BB9 - Coolant Temperature Sensor
BA8 - Sensor Ground
BB10 - Throttle Position Sensor Signal
BB3 - +5 Volt Reference
BB7 - Intake Air Temperature Sensor Signal
BA7 - Sensor Ground
BD3 - Oxygen Sensor Signal
BD2 - Oxygen Sensor Signal Ground
BB6 - Ground
GC15 - [1][2]Torque Converter Clutch - Pulse Width Modulated (TCC-PWM) Solenoid
GD16 - Shift Solenoid "A"
GD15 - Shift Solenoid "B"
GC6 - [1][2]Torque Converter Clutch Apply Solenoid
BA5 - Brake Switch Input (TCC - "OFF")
GD7 - 4 K/M Speed output (to Speedo)
BB11 - Diagnostic lead (ALDL)
GC1 - Service Engine Soon (SES) Light
BC2 - Serial Data (ALDL)
GD14 - Vehicle Speed Sensor (high)
GD13 - Vehicle Speed Sensor (low)
BD8 - PRNDL "A"
BD7 - PRNDL "B"
BD6 - PRNDL "C"
BD5 - PRNDL "P"
BC4 - Fuel Pump Relay
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.