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• When Monitored: • Set Condition: Possible Causes (K125) GEN FIELD CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE (K125) GEN FIELD CONTROL CIRCUIT OPEN (K125) GEN FIELD CONTROL CIRCUIT SHORTED TO GROUND (Z932) GROUND CIRCUIT OPEN GENERATOR PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. ACTIVE DTC Ignition on, engine not running. With a scan tool, read DTCs. Is the DTC active at this time? Yes >> Go To 2 No >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 2. GENERATOR OPERATION Turn the ignition off. Disconnect the Generator Field harness connector. Using a 12-volt test light, jump it across the Generator Field harness Ignition on, engine not running. With the scan tool, actuate the Generator Field Control circuit. Does the test light illuminate brightly and flash on and off? Yes >> Replace the Generator. Perform the POWERTRAIN VERIFICATION TEST. (Refer to No >> Go To 3 9 - 474 ENGINE ELECTRICAL DIAGNOSTICS KJ |