Author Topic: INJECTOR CIRCUIT DIAGNOSIS CHART A-4 (TBI)  (Read 1103 times)

Offline VileZambonie

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INJECTOR CIRCUIT DIAGNOSIS CHART A-4 (TBI)
« on: October 09, 2019, 05:16:24 PM »
CHART A-4 - INJECTOR CIRCUIT DIAGNOSIS





Circuit Description :
This chart should only be used if diagnosis in CHART A-3 indicated an injector circuit problem. If both injector circuits fail to blink when tested, diagnose, one injector circuit at a time.

Test Description : Step numbers refer to step numbers on diagnostic chart.
This step tests for 12 volts to the injector. It will also determine if there is a short to voltage on the ECM side of the circuit.
This test checks for continuity to the ECM.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10