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 MANUALSCHEVROLET1992BLAZER FULL SIZE V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDIAGRAMSWITHOUT 4L60E/4L80E AUTOMATIC TRANSMISSION
1992 Chevrolet Blazer Full Size V8-350 5.7L
Without 4L60E/4L80E Automatic Transmission
1992 Chevrolet Blazer Full Size V8-350 5.7LSECTION Without 4L60E/4L80E Automatic Transmission
ECM Connector Terminal End View (Part 1 Of 2):
A1 = FUEL PUMP RELAY DRIVE.
A4 = EGR CONTROL.
A5 = SERVICE ENGINE SOON LIGHT CONTROL.
A6 = IGN-ECM FUSED.
A7 = TCC CONTROL.
A8 = SERIAL DATA.
A9 = DIAGNOSTIC TEST TERMINAL.
A10 = VEHICLE SPEED SENSOR SIGNAL.
A11 = MAP SENSOR GROUND.
A12 = SYSTEM GROUND.
B1 = BATTERY 12 VOLT.
B2 = FUEL PUMP SIGNAL.
B3 = EST REFERENCE LOW.
B5 = EST REFERENCE HIGH.
B7 = ESC SIGNAL.
B8 = A/C SIGNAL.
B10 = PARK/NEUTRAL SWITCH SIGNAL.
ECM Connector Terminal End View (Part 2 Of 2):
C2 = EAC SOLENOID.
C3 = IAC "B" LOW.
C4 = IAC "B" HIGH.
C5 = IAC "A" HIGH.
C6 = IAC "A" LOW.
C7 = HIGH GEAR SWITCH SIGNAL.
C9 = CRANK SIGNAL.
C10 = CTS SIGNAL.
C11 = MAP SENSOR SIGNAL.
C13 = TPS SIGNAL.
C14 = MAP, TPS 5 VOLT REFERENCE.
C16 = BATTERY 12 VOLT.
D1 = SYSTEM GROUND.
D2 = TPS & CTS SENSOR GROUND.
D4 = EST.
D5 = EST BYPASS.
D6 = OXYGEN SENSOR GROUND.
D7 = OXYGEN SENSOR SIGNAL.
D14 = INJECTOR 2 DRIVER CONTROL.
D16 = INJECTOR 1 DRIVER CONTROL.
RENDER: 1.0x
NO RELATED
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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.