Left Rear Door Ajar Circuit Open

LEFT REAR DOOR AJAR CIRCUIT OPEN

Left Rear Door Ajar Circuit Open:

POSSIBLE CAUSES
- Open (Z79/917) left rear door ajar switch ground circuit
- Open (G77) left rear door ajar switch sense circuit
- Open left rear door ajar switch
- Instrument cluster

DIAGNOSTIC TEST

1. OPEN LEFT REAR DOOR AJAR SWITCH




Disconnect the Left Rear Door Latch connector.
Connect a jumper wire between the (G77) Sense circuit and the Ground circuit.
With the scan tool in Inputs/Outputs, read the L R DOOR AJAR SW state.

Q: Does the scan tool display CLOSED?

YES: Replace the Left Rear Door Latch.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 2

2. OPEN (Z79/Z917) LEFT REAR DOOR AJAR SWITCH GROUND CIRCUIT




Using a 12-volt Test Light connected to 12-volts, test the (Z79/Z917) Ground circuit in the Door Latch connector.

Q: Does the test light illuminate brightly?

YES: Go To 3
NO: Repair the (Z79/Z917) Left Rear Door Ajar Switch Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3. OPEN (G77) LEFT REAR DOOR AJAR SWITCH SENSE CIRCUIT




Turn the ignition off.
Disconnect the Instrument Cluster C3 harness connector.
Measure the resistance of the (G77) Left Rear Door Ajar Switch Sense circuit between the Instrument Cluster connector and the Door Latch connector.

Q: Is the resistance below 5.0 ohms?

YES: Replace the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Repair the (G77) Left Rear Door Ajar Switch Sense circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test