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 MANUALSCHEVROLET1993BLAZER FULL SIZE V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDIAGRAMSWITHOUT 4L60E/4L80E AUTOMATIC TRANSMISSION
1993 Chevrolet Blazer Full Size V8-350 5.7L
Without 4L60E/4L80E Automatic Transmission
1993 Chevrolet Blazer Full Size V8-350 5.7LSECTION Without 4L60E/4L80E Automatic Transmission
ECM Connector Terminal End View (Part 1 of 4):
A1 = FUEL PUMP RELAY DRIVE.
A4 = EGR CONTROL.
A5 = MALFUNCTION INDICATOR LAMP (MIL) CONTROL.
A6 = IGN ECM FUSED.
A7 = SHIFT LAMP.
A8 = SERIAL DATA.
A9 = DIAGNOSTIC TEST TERMINAL.
A10 = VEHICLE SPEED SENSOR SIGNAL.
A11 = MAP SENSOR GROUND.
A12 = SYSTEM GROUND.
B1 = BATTERY FEED.
B2 = FUEL PUMP SIGNAL.
B3 = IC REFERENCE LOW.
B5 = IC REFERENCE HIGH.
B7 = KNOCK SIGNAL.
B8 = A/C REQUEST SIGNAL.
ECM Connector Terminal End View (Part 3 of 4):
C2 = AIR BYPASS VALVE.
C3 = IAC "B" LOW.
C4 = IAC "B" HIGH.
C5 = IAC "A" HIGH.
C6 = IAC "A" LOW.
C9 = CRANK SIGNAL.
C10 = ECT SIGNAL.
C11 = MAP SIGNAL.
C13 = TPS SIGNAL.
C14 = MAP & TPS REF. SIGNAL.
C16 = BATTERY FEED.
ECM Connector Terminal End View (Part 4 of 4):
D1 = SYSTEM GROUND.
D2 = TPS/ECT SENSOR GROUND.
D4 = IC CONTROL.
D5 = IC BYPASS.
D6 = OXYGEN SENSOR GROUND.
D7 = OXYGEN SENSOR SIGNAL.
D14 = INJECTOR "B" CONTROL.
D16 = INJECTOR "A" 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.