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Possible Causes BODY CONTROL MODULE (BCM) DTC(S) PRESENT (Z938) GROUND CIRCUIT OPEN (G15) KEY-IN IGNITION SWITCH SENSE CIRCUIT OPEN IGNITION SWITCH OPEN BODY CONTROL MODULE (BCM) Diagnostic Test 1. CHECK FOR DTCs IN THE BODY CONTROL MODULE (BCM) NOTE: The driver door ajar switch must be operational for the result of this test to be valid. With the scan tool, read BCM DTCs. Does the scan tool display any Cluster Wake Up Output or Communication DTCs? Yes >> Refer to the Table of Contents in (Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER - DIAGNOSIS AND TESTING) or in (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS No >> Go To 2 2. CHECK THE KEY IN IGNITION STATUS WITH THE SCAN TOOL With the scan tool in BCM, select Input Output. With the scan tool, read the Key In Ignition Status. Does the scan tool display: Key In Ignition? Yes >> Replace and program the BCM in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL No >> Go To 3 3. CHECK FOR AN OPEN IGNITION SWITCH Back probe the Ignition Switch harness connector with a jumper wire With the scan tool, read the Key In Ignition Status. Does the scan tool display: Key In Ignition? Yes >> Replace the Ignition Switch in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - CONTROL MODULES - STANDARD PROCEDURE). No >> Go To 4 8B - 8 CHIME/BUZZER - ELECTRICAL DIAGNOSTICS KJ |