Page 945 of 4284

Symptom:
*BOTH MIRRORS DO NOT UNFOLD EXCEPT WITH EITHER
FRONT DOOR
POSSIBLE CAUSES
RELATED DIAGNOSTIC TROUBLE CODES
POWER FOLDING MIRROR SWITCH
FOLDING MIRROR SWITCH SIGNAL SHORT TO GROUND
BODY CONTROL MODULE
TEST ACTION APPLICABILITY
1 With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay any related DTC's?All
Ye s®Refer to symptom list for problems related to Power Folding
Mirrors.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
2 Disconnect the Power Folding Mirror Switch connector.
Check connectors - Clean/repair as necessary.
Did the mirrors unfold?All
Ye s®Replace the Power Folding Mirror Switch.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
3 Disconnect the Power Folding Mirror Switch connector.
Disconnect the BCM C4 harness connector.
Check connectors - Clean/repair as necessary.
Measure the resistance of the Folding Mirror Switch Signal circuit at the Power
Folding Mirror Switch connector to ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Folding Mirror Switch Signal circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
916
POWER MIRROR ± FOLDING
Page 946 of 4284

Symptom:
*BOTH POWER FOLDING MIRRORS DO NOT FOLD
POSSIBLE CAUSES
RELATED DIAGNOSTIC TROUBLE CODES
GROUND CIRCUIT OPEN
POWER FOLDING MIRROR SWITCH
FOLDING MIRROR SWITCH SIGNAL OPEN
BODY CONTROL MODULE
TEST ACTION APPLICABILITY
1 With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay any related DTC's?All
Ye s®Refer to symptom list for problems related to Power Folding
Mirrors.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
2 Disconnect the Power Folding Mirror switch connector
Check connectors - Clean/repair as necessary.
Measure the resistance of the ground circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 3
No®Repair the ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
3 Disconnect the Power Folding Mirror Switch connector.
Check connectors - Clean/repair as necessary.
With the DRBIIItin Inputs/Outputs, read the Foldaway Switch state.
Connect a jumper wire between the Folding Mirror Switch Signal circuit and ground.
Does the DRBIIItdisplay change?All
Ye s®Replace the Power Folding Mirror Switch.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 4
4 Disconnect the Power Folding Mirror Switch connector.
Disconnect the BCM C4 harness connector.
Check connectors - Clean/repair as necessary.
Measure the resistance of the Folding Mirror Switch Signal circuit between the BCM
C4 connector and the Power Folding Mirror Switch connector.
Is the resistance below 5.0 ohms?All
Ye s®Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair the Folding Mirror Switch Signal circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
917
POWER MIRROR ± FOLDING
Page 947 of 4284

Symptom:
*DRIVER FOLDING MIRROR DOES NOT FOLD
POSSIBLE CAUSES
RELATED DIAGNOSTIC TROUBLE CODES
POWER MIRROR
FOLDING MIRROR UNFOLD DRIVER CIRCUIT OPEN
DRIVER FOLDING MIRROR FOLD DRIVER CIRCUIT OPEN
BODY CONTROL MODULE
TEST ACTION APPLICABILITY
1 With the DRBIIIt, read Body Computer DTCs.
Does the DRBIIItdisplay any related DTC's?All
Ye s®Refer to symptom list for problems related to Power Folding
Mirrors.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
2 Disconnect the inoperative Power Mirror connector.
NOTE: Check connectors - Clean/repair as necessary.
Connect one lead of a test light to the Passenger Folding Mirror Relay Output circuit
and the other lead to the appropriate Folding Mirror Unfold Driver in the power
mirror harness connector.
With the DRBIIIt, actuate the Folding Mirrors.
Does the test light illuminate brightly?All
Ye s®Replace the appropriate Power Mirror.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
3 Disconnect the inoperative Power Mirror connector.
Disconnect the Body Control Module C2 connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the appropriate Folding Mirror Unfold Driver circuit from the BCM C2
connector to the power mirror harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 4
No®Repair the appropriate Folding Mirror Unfold Driver circuit for
an open.
Perform BODY VERIFICATION TEST - VER 1.
918
POWER MIRROR ± FOLDING
Page 948 of 4284
TEST ACTION APPLICABILITY
4 Disconnect the inoperative Power Mirror connector.
Disconnect the Body Control Module C2 connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the Driver Folding Mirror Fold Driver circuit from the BCM C2 connector
to the mirror harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair the Driver Folding Mirror Fold Driver circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
919
POWER MIRROR ± FOLDING
*DRIVER FOLDING MIRROR DOES NOT FOLD ÐContinued
Page 949 of 4284

Symptom:
*PASSENGER FOLDING MIRROR DOES NOT FOLD
POSSIBLE CAUSES
RELATED DIAGNOSTIC TROUBLE CODES
PASSENGER FOLDING MIRROR RELAY
POWER MIRROR
FOLDING MIRROR UNFOLD DRIVER CIRCUIT OPEN
PASSENGER FOLDING MIRROR RELAY OUTPUT CIRCUIT OPEN
PASSENGER FOLDING MIRROR RELAY INPUT CIRCUIT OPEN
BODY CONTROL MODULE
TEST ACTION APPLICABILITY
1 With the DRBIIIt, read Body Computer DTCs.
Does the DRBIIItdisplay any related DTC's?All
Ye s®Refer to symptom list for problems related to Power Folding
Mirrors.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
2 Disconnect the Passenger Folding Mirror Relay.
Check connectors - Clean/repair as necessary.
Connect a substitute relay in place of the Passenger Folding Mirror Relay.
NOTE: Doors must be closed to allow the mirrors to fold with the power folding
mirror switch.
Attempt to operate the power folding mirror system with the power folding mirror
switch and by opening and closing both front doors with mirrors folded.
Does the system now operate properly?All
Ye s®Replace the Passenger Folding Mirror Relay.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
3 Connect Passenger Folding Mirror Relay if disconnected in previous step.
Disconnect the inoperative Power Mirror connector.
NOTE: Check connectors - Clean/repair as necessary.
Connect one lead of a test light to the Passenger Folding Mirror Relay Output circuit
and the other lead to the appropriate Folding Mirror Unfold Driver in the power
mirror harness connector.
With the DRBIIIt, actuate the Folding Mirrors.
Does the test light illuminate brightly?All
Ye s®Replace the appropriate Power Mirror.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 4
920
POWER MIRROR ± FOLDING
Page 950 of 4284

TEST ACTION APPLICABILITY
4 Disconnect the inoperative Power Mirror connector.
Disconnect the Body Control Module C2 connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the appropriate Folding Mirror Unfold Driver circuit from the BCM C2
connector to the power mirror harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 5
No®Repair the appropriate Folding Mirror Unfold Driver circuit for
an open.
Perform BODY VERIFICATION TEST - VER 1.
5 Disconnect the inoperative Power Mirror connector.
Disconnect the Passenger Folding Mirror Relay.
NOTE: Check connectors - Clean/repair as necessary.
Measure the Passenger Folding Mirror Relay Output circuit from the relay connector
to the mirror harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 6
No®Repair the Passenger Folding Mirror Relay Output circuit for an
open.
Perform BODY VERIFICATION TEST - VER 1.
6 Disconnect the Body Control Module C2 connector.
Disconnect the Passenger Folding Mirror Relay.
NOTE: Check connectors - Clean/repair as necessary.
Measure the Passenger Folding Mirror Relay Input circuit from the relay connector
to the BCM C2 connector.
Is the resistance below 5.0 ohms?All
Ye s®Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair the Passenger Folding Mirror Relay Input circuit for an
open.
Perform BODY VERIFICATION TEST - VER 1.
921
POWER MIRROR ± FOLDING
*PASSENGER FOLDING MIRROR DOES NOT FOLD ÐContinued
Page 951 of 4284

Symptom:
BCM MESSAGES NOT RECEIVED
When Monitored and Set Condition:
BCM MESSAGES NOT RECEIVED
When Monitored: Continuously with the ignition on.
Set Condition: The RKE/Thatcham Alarm Module does not receive any messages from
the BCM for at least 5 seconds.
POSSIBLE CAUSES
INTERMITTENT CONDITION
BCM COMMUNICATION FAILURE
PCI BUS CIRCUIT OPEN
RKE/THATCHAM ALARM MODULE - INTERNAL MALFUNCTION
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, attempt to communicate with the BCM.
Was the DRBIIItable to communicate with the BCM?All
Ye s®Go To 2
No®Refer to the Communication category and perform the appropri-
ate symptom.
Perform VTSS VERIFICATION TEST - 1A.
2 Turn the ignition on.
With the DRBIIIt, attempt to communicate with the RKE/Thatcham Alarm Module.
Was the DRBIIItable to communicate with the RKE/Thatcham Alarm Module?All
Ye s®The condition that caused this symptom is currently not present.
Inspect the related wiring harness for a possible intermittent
condition.
Perform VTSS VERIFICATION TEST - 1A.
No®Go To 3
3 Turn the ignition off.
Disconnect the RKE/Thatcham Alarm Module C1 harness connector.
Connect the diagnostic junction port tester #8339 to the diagnostic junction port.
NOTE: Do not connect the tester to the DRBIIIt.
Measure the resistance of the PCI Bus circuit between the diagnostic junction port
tester and the RKE/Thatcham Alarm Module C1 connector (cavity 13).
Is the resistance below 5.0 ohms?All
Ye s®Replace the RKE/Thatcham Alarm Module.
Perform VTSS VERIFICATION TEST - 1A.
No®Repair the PCI Bus circuit for an open.
Perform VTSS VERIFICATION TEST - 1A.
922
VEHICLE THEFT/SECURITY
Page 952 of 4284

Symptom:
HORN INPUT STUCK
When Monitored and Set Condition:
HORN INPUT STUCK
When Monitored: Continuously with the ignition on.
Set Condition: The FCM has detected a fault in the Horn Switch Sense circuit.
POSSIBLE CAUSES
FRONT CONTROL MODULE INTERNAL MALFUNCTION
FUSE AND RELAY CENTER INTERNAL MALFUNCTION
INTERMITTENT CONDITION
HORN SWITCH SENSE CIRCUIT SHORTED TO GROUND
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, erase the current Front Control Module DTC's.
Turn the ignition off, wait 10 seconds then turn the ignition on.
With the DRBIIIt, read the current Front Control Module DTC's.
Does the DRBIIItdisplay: HORN INPUT STUCK?All
Ye s®Go To 2
No®The condition that caused this symptom is currently not present.
Inspect the related wiring harness for a possible intermittent
condition.
Perform VTSS VERIFICATION TEST - 1A.
2 Turn the ignition off.
Disconnect the Front Control Module from the Fuse and Relay Center.
Measure the resistance between ground and the Horn Switch Sense circuit at the
Fuse and Relay Center side of the FCM connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 3
No®Replace the Front Control Module.
Perform VTSS VERIFICATION TEST - 1A.
3 Turn the ignition off.
Disconnect connector C7 on the Fuse and Relay Center.
Measure the resistance between ground and the Horn Switch Sense circuit at the
Fuse and Relay Center C7 connector.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Horn Switch Sense circuit for a short to ground.
Perform VTSS VERIFICATION TEST - 1A.
No®Replace the Fuse and Relay Center.
Perform VTSS VERIFICATION TEST - 1A.
923
VEHICLE THEFT/SECURITY