Door Ajar Indicator Malfunction
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Door Ajar Indicator Malfunction
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Diagnostic Fault Information
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Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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Left Front Door Ajar Switch Signal
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1
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2
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2
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-
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Left Rear Door Ajar Switch Signal
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1
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2
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2
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-
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Right Front Door Ajar Switch Signal
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1
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2
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2
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-
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Right Rear Door Ajar Switch Signal
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1
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2
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2
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-
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Driver Door Latch Ground
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-
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2
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-
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-
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Passenger Door Latch Ground
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-
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2
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-
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-
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Left Rear Door Latch Ground
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-
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2
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-
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-
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Right Rear Door Latch Ground
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-
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2
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-
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-
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1. Ajar Indicator Always Illuminated
2. Ajar Indicator Inoperative
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Circuit/System Description
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The driver window motor and passenger window motor each receive a discrete input from their respective door ajar switch signal circuits. The rear door window motors (with AER) or the rear door window switches (with AEQ) receive discrete inputs from each of the rear door ajar switch signal circuits. The door ajar switches are integral to each door latch assembly. When a door is opened, the normally open door ajar switch closes. With the door ajar switch closed, ground is provided to the door ajar switch signal circuit. This is interpreted by the window motors and/or window switches, which communicate this status to the body control module (BCM) via the local interconnect network (LIN) bus. The BCM communicates with the instrument panel cluster via a GMLAN message. The instrument panel cluster, upon receipt of this GMLAN message, will illuminate the appropriate door ajar indicator and also send a GMLAN message to the radio to activate the door ajar audible warning when the vehicle speed is greater then 8 km/h (5 MPH).
Schematic Reference
Door Lock/Indicator Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Door Ajar Indicator Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for information on diagnostic tools
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Circuit/System Verification
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1.
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Ignition ON, observe the scan tool Driver Door Ajar Switch parameter while opening and closing the driver door. The parameter should change between Active and Inactive.
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2.
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If the value does not change, refer to Driver Door Ajar Switch Malfunction.
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3.
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Observe the scan tool Passenger Door Ajar Switch parameter while opening and closing the front passenger door. The parameter should change between Active and Inactive.
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4.
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If the value does not change, refer to Passenger Door Ajar Switch Malfunction.
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5.
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Observe the scan tool Left Rear Door Ajar Switch and Right Rear Door Ajar Switch parameters while opening and closing the left and right rear doors. The parameters should change between Inactive and Active.
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6.
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If the appropriate value does not change, refer to Rear Door Ajar Switch Malfunction.
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Driver Door Ajar Switch Malfunction
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1.
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Ignition OFF, disconnect the harness connector at the A23D Door Latch Assembly - Driver.
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2.
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Test for less than 5 Ω between the ground circuit terminal listed below and ground.
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•
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Left hand drive A23D Door Latch Assembly - Driver terminal 8
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•
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Right hand drive A23D Door Latch Assembly - Driver terminal 3
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3.
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If greater than the specified range, test the ground circuit for an open/high resistance.
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4.
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Ignition ON, verify the scan tool Driver Door Ajar Switch parameter is Inactive.
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5.
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If not the specified value, test the signal circuit listed below for a short to ground. If the circuit tests normal, replace the M74D Window Motor - Driver.
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Left hand drive A23D Door Latch Assembly - Driver terminal 6
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Right hand drive A23D Door Latch Assembly - Driver terminal 1
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6.
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Install a 3 A fused jumper wire between the signal circuit terminal listed below and ground. Verify the scan tool Driver Door Ajar Switch parameter is Active.
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Left hand drive A23D Door Latch Assembly - Driver terminal 6
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Right hand drive A23D Door Latch Assembly - Driver terminal 1
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7.
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If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the M74D Window Motor - Driver.
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8.
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If all circuits test normal, test or replace the A23D Door Latch Assembly - Driver.
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Passenger Door Ajar Switch Malfunction
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1.
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Ignition OFF, disconnect the harness connector at the A23P Door Latch Assembly - Passenger.
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2.
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Test for less than 5 Ω between the ground circuit terminal listed below and ground.
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•
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Left hand drive A23P Door Latch Assembly - Passenger terminal 3
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Right hand drive A23P Door Latch Assembly - Passenger terminal 8
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3.
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If greater than the specified range, test the ground circuit for an open/high resistance.
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4.
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Ignition ON, verify the scan tool Passenger Door Ajar Switch parameter is Inactive.
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5.
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If not the specified value, test the signal circuit listed below for a short to ground. If the circuit tests normal, replace the S79P Window Switch - Passenger.
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Left hand drive A23P Door Latch Assembly - Passenger terminal 1
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Right hand drive A23P Door Latch Assembly - Passenger terminal 6
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6.
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Install a 3 A fused jumper wire between the signal circuit terminal listed below and ground. Verify the scan tool Passenger Door Ajar Switch parameter is Active.
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Left hand drive A23P Door Latch Assembly - Passenger terminal 1
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Right hand drive A23P Door Latch Assembly - Passenger terminal 6
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7.
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If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the S79P Window Switch - Passenger.
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8.
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If all circuits test normal, test or replace the A23P Door Latch Assembly - Passenger.
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Rear Door Ajar Switch Malfunction with AER
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1.
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Ignition OFF, disconnect the harness connector at the appropriate rear door latch.
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2.
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Connect the harness connector at the rear window switch.
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3.
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Test for less than 5 Ω between the ground circuit terminal listed below and ground:
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A23LR Door Latch Assembly - Left Rear terminal 8
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A23RR Door Latch Assembly - Right Rear terminal 3
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4.
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If greater than the specified range, test the ground circuit for an open/high resistance.
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5.
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Ignition ON, verify the appropriate scan tool Rear Door Ajar Switch parameter is Inactive.
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6.
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If not the specified value, test the signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the rear window motor.
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A23LR Door Latch Assembly - Left Rear terminal 6
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A23RR Door Latch Assembly - Right Rear terminal 1
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7.
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Install a 3 A fused jumper wire between the signal circuit terminal listed below and ground. Verify the scan tool Rear Door Ajar Switch parameter is Active.
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A23LR Door Latch Assembly - Left Rear terminal 6
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A23RR Door Latch Assembly - Right Rear terminal 1
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8.
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If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the rear window motor.
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9.
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If all circuits tests normal, test or replace the rear door latch.
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Rear Door Ajar Switch Malfunction without AER
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1.
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Ignition OFF, disconnect the harness connector at the appropriate rear door latch.
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2.
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Connect the harness connector at the rear window switch.
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3.
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Test for less than 5 Ω between the ground circuit terminal listed below and ground:
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A23LR Door Latch Assembly - Left Rear terminal 8
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A23RR Door Latch Assembly - Right Rear terminal 3
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4.
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If greater than the specified range, test the ground circuit for an open/high resistance.
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5.
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Ignition ON, verify the appropriate scan tool Rear Door Ajar Switch parameter is Inactive.
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6.
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If not the specified value, test the signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the rear window switch.
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A23LR Door Latch Assembly - Left Rear terminal 6
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A23RR Door Latch Assembly - Right Rear terminal 1
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7.
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Install a 3 A fused jumper wire between the signal circuit terminal listed below and ground. Verify the scan tool Rear Door Ajar Switch parameter is Active.
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A23LR Door Latch Assembly - Left Rear terminal 6
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A23RR Door Latch Assembly - Right Rear terminal 1
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8.
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If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the rear window switch.
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9.
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If all circuits tests normal, test or replace the rear door latch.
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Static Test
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1.
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Ignition OFF, disconnect the harness connector at the appropriate door latch.
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2.
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With the switch in the open position, test for infinite resistance between the signal and the ground terminals listed below:
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Left hand drive A23D Door Latch Assembly - Driver signal terminal 6 and ground terminal 8
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Right hand drive A23D Door Latch Assembly - Driver signal terminal 1 and ground terminal 3
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Left hand drive A23P Door Latch Assembly - Passenger signal terminal 1 and ground terminal 3
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Right hand drive A23P Door Latch Assembly - Passenger signal terminal 6 and ground terminal 8
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A23LR Door Latch Assembly - Left Rear signal terminal 6 and ground terminal 8
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A23RR Door Latch Assembly - Right Rear signal terminal 1 and ground terminal 3
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3.
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If not the specified value, replace the door latch.
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4.
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With the switch in the closed position, test for less than 5 Ω between the signal and the ground terminals listed below:
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Left hand drive A23D Door Latch Assembly - Driver signal terminal 6 and ground terminal 8
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Right hand drive A23D Door Latch Assembly - Driver signal terminal 1 and ground terminal 3
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Left hand drive A23P Door Latch Assembly - Passenger signal terminal 1 and ground terminal 3
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Right hand drive A23P Door Latch Assembly - Passenger signal terminal 6 and ground terminal 8
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A23LR Door Latch Assembly - Left Rear signal terminal 6 and ground terminal 8
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A23RR Door Latch Assembly - Right Rear signal terminal 1 and ground terminal 3
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5.
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If greater than the specified range, replace the door latch.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
