
Symptom:
PCM MESSAGES NOT RECEIVED
When Monitored and Set Condition:
PCM MESSAGES NOT RECEIVED
When Monitored: Continuously with the ignition on.
Set Condition: The RKE/Thatcham Alarm Module does not receive any messages from
the PCM for at least 5 seconds.
POSSIBLE CAUSES
INTERMITTENT CONDITION
PCM 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 PCM.
Was the DRBIIItable to communicate with the PCM?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.
939
VEHICLE THEFT/SECURITY

Symptom:
VEHICLE THEFT ALARM INDICATOR OUTPUT OPEN
When Monitored and Set Condition:
VEHICLE THEFT ALARM INDICATOR OUTPUT OPEN
When Monitored: Continuously with the ignition on.
Set Condition: The BCM has detected an open in the VTSS Indicator Driver circuit.
POSSIBLE CAUSES
INTERMITTENT CONDITION
VTA LAMP FUNCTIONAL TEST
VTSS INDICATOR DRIVER CIRCUIT OPEN
BODY CONTROL MODULE INTERNAL MALFUNCTION
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, erase the current Body Control Module DTC's.
Turn the ignition off, wait 10 seconds then turn the ignition on.
With the DRBIIIt, read the current Body Control Module DTC's.
Does the DRBIIItdisplay: VTA INDICATOR OUTPUT OPEN?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 With the DRBIIIt, actuate the VTA Indicator Lamp.
Did the VTA Lamp flash on and off during the actuation?All
Ye s®Replace the Body Control Module.
Perform VTSS VERIFICATION TEST - 1A.
No®Go To 3
3 Disconnect the Message Center harness connector.
Disconnect the Body Control Module C4 harness connector.
Measure the resistance of the VTSS Indicator Driver circuit.
Is the resistance below 5.0 ohms?All
Ye s®Replace the Body Control Module.
Perform VTSS VERIFICATION TEST - 1A.
No®Repair the VTSS Indicator Driver circuit for an open.
Perform VTSS VERIFICATION TEST - 1A.
940
VEHICLE THEFT/SECURITY

Symptom:
VEHICLE THEFT ALARM INDICATOR OUTPUT SHORT
When Monitored and Set Condition:
VEHICLE THEFT ALARM INDICATOR OUTPUT SHORT
When Monitored: Continuously with the ignition on.
Set Condition: The BCM has detected a short to ground in the VTSS Indicator Driver
circuit.
POSSIBLE CAUSES
INTERMITTENT CONDITION
MESSAGE CENTER INTERNAL MALFUNCTION
BODY CONTROL MODULE INTERNAL MALFUNCTION
VTSS INDICATOR DRIVER CIRCUIT SHORTED TO GROUND
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, erase the current Body Control Module DTC's.
Turn the ignition off, wait 10 seconds then turn the ignition on.
With the DRBIIIt, read the current Body Control Module DTC's.
Does the DRBIIItdisplay: VTA INDICATOR OUTPUT OPEN?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 Disconnect the Body Control Module C4 connector.
Measure the resistance between ground and the VTSS Indicator Driver circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 3
No®Replace the Body Control Module.
Perform VTSS VERIFICATION TEST - 1A.
3 Disconnect the Body Control Module C4 connector.
Disconnect the Message Center connector.
Measure the resistance of the VTSS Indicator Driver circuit to ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the VTSS Indicator Driver circuit for a short to ground.
Perform VTSS VERIFICATION TEST - 1A.
No®Replace the Message Center assembly.
Perform VTSS VERIFICATION TEST - 1A.
941
VEHICLE THEFT/SECURITY

Symptom:
*VTSS INDICATOR INOPERATIVE
POSSIBLE CAUSES
OPEN VTSS INDICATOR FUSED B(+) SUPPLY
OPEN VTSS LED
VTSS INDICATOR DRIVER CIRCUIT OPEN
BODY CONTROL MODULE INTERNAL MALFUNCTION
TEST ACTION APPLICABILITY
1 Disconnect the Message Center harness connector.
Measure the voltage of the Fused B+ circuit.
Is the voltage above 10.0 volts?All
Ye s®Go To 2
No®Repair the Fused B(+) (Hazard) circuit for an open.
Perform VTSS VERIFICATION TEST - 1A.
2 Disconnect the Message Center harness connector.
With a 12-volt test light connected to 12-volts, connect the test light probe to the
VTSS Indicator Driver circuit.
Turn the ignition on.
With the DRBIIItin Vehicle Theft, actuate the VTSS Indicator lamp.
Does the test light illuminate when the VTSS Indicator lamp is actuated?All
Ye s®Replace the Message Center assembly.
Perform VTSS VERIFICATION TEST - 1A.
No®Go To 3
3 Disconnect the Message Center harness connector.
Disconnect the Body Control Module C4 harness connector.
Measure the resistance of the VTSS Indicator Driver circuit.
Is the resistance below 5.0 ohms?All
Ye s®Replace the Body Control Module.
Perform VTSS VERIFICATION TEST - 1A.
No®Repair the VTSS Indicator Driver circuit for an open.
Perform VTSS VERIFICATION TEST - 1A.
950
VEHICLE THEFT/SECURITY

Symptom:
*VTSS INDICATOR LAMP INOPERATIVE
POSSIBLE CAUSES
RKE/THATCHAM ALARM MODULE - INTERNAL MALFUNCTION
VTSS INDICATOR SUPPLY CIRCUIT OPEN
OPEN VTSS LED
VTSS INDICATOR DRIVER CIRCUIT OPEN
RKE/THATCHAM ALARM MODULE - INTERNAL MALFUNCTION
TEST ACTION APPLICABILITY
1 With the DRBIIIt, actuate the VTSS INDICATOR LAMP.
Does the VTSS Indicator Lamp flash while actuating.All
Ye s®Replace the RKE/Thatcham Alarm Module.
Perform VTSS VERIFICATION TEST - 1A.
No®Go To 2
2 Disconnect the VTSS Indicator Lamp harness connector.
Measure the voltage of the VTSS Indicator Supply circuit.
Is the voltage above 10.0 volts?All
Ye s®Go To 3
No®Repair the VTSS Indicator Supply circuit for an open.
Perform VTSS VERIFICATION TEST - 1A.
3 Disconnect the VTSS Indicator Lamp harness connector.
With a 12-volt test light connected to 12-volts, connect the test light probe to the
VTSS Indicator Driver circuit.
Turn the ignition on.
With the DRBIIItin Vehicle Theft, actuate the VTSS Indicator lamp.
Does the test light illuminate when the VTSS Indicator lamp is actuated?All
Ye s®Replace the VTSS Indicator LED Lamp.
Perform VTSS VERIFICATION TEST - 1A.
No®Go To 4
4 Disconnect the VTSS Indicator Lamp harness connector.
Disconnect the RKE/Thatcham Alarm Module C1 harness connector.
Measure the resistance of the VTSS Indicator Driver circuit.
Is the resistance below 5.0 ohms?All
Ye s®Replace the RKE/Thatcham Alarm Module.
Perform VTSS VERIFICATION TEST - 1A.
No®Repair the VTSS Indicator Driver circuit for an open.
Perform VTSS VERIFICATION TEST - 1A.
951
VEHICLE THEFT/SECURITY

Symptom:
*VTSS SIREN INOP
POSSIBLE CAUSES
INTERMITTENT CONDITION
SIREN SIGNAL CONTROL CIRCUIT OPEN
SIREN SIGNAL RETURN CIRCUIT OPEN
SIREN SUPPLY CIRCUIT OPEN
VTSS SIREN
RKE/THATCHAM ALARM MODULE - INTERNAL MALFUNCTION
RKE/THATCHAM ALARM MODULE - INTERNAL MALFUNCTION
RKE/THATCHAM ALARM MODULE - INTERNAL MALFUNCTON
VTSS SIREN - INTERNAL MALFUNCTION
VTSS SIREN - INTERNAL MALFUNCTION
VTSS SIREN - INTERNAL MALFUNCTION
TEST ACTION APPLICABILITY
1 With the DRBIIIt, actuate the VTSS Siren.
Does the Siren sound while actuating?All
Ye s®The condition that caused this symptom is currently not present.
Inspect the related wiring harness for a possible intermittent
condition. Look for any chafed, pierced, pinched or partially
broken wires.
Perform VTSS VERIFICATION TEST - 1A.
No®Go To 2
2 Gain access to the VTSS Siren.
Disconnect the VTSS Siren connector.
Turn the ignition on.
Measure the voltage of the Siren Supply circuit (cavity 3) in the VTSS Siren
connector.
Is the voltage above 10.0 volts?All
Ye s®Go To 3
No®Go To 9
3 With the VTSS Siren connector disconnected.
Measure the resistance of the Siren Signal Return circuit to ground.
Is the resistance below 5.0 ohms?All
Ye s®Go To 4
No®Go To 7
952
VEHICLE THEFT/SECURITY

TEST ACTION APPLICABILITY
4 With the VTSS Siren connector disconnected.
Turn the ignition on.
Measure the voltage of the Siren Signal Control circuit (cavity 2) in the VTSS Siren
connector.
Is the voltage approximately 5.0 volts?All
Ye s®Replace the VTSS Siren.
Perform VTSS VERIFICATION TEST - 1A.
No®Go To 5
5 Gain access to the RKE/Thatcham Alarm Module C1 harness connector.
While back probing, measure the voltage of the Siren Signal Control circuit.
Turn the ignition on.
Is the voltage approximately 5.0 volts?All
Ye s®Go To 6
No®Replace the RKE/Thatcham Alarm Module.
Perform VTSS VERIFICATION TEST - 1A.
6 Disconnect the RKE/Thatcham Alarm Module C1 harness connector.
Measure the resistance of the Siren Signal Control circuit between the RKE/
Thatcham Alarm Module and the VTSS Siren connector.
Is the resistance below 5.0 ohms?All
Ye s®Replace the VTSS Siren.
Perform VTSS VERIFICATION TEST - 1A.
No®Repair the Siren Signal Control circuit for an open.
Perform VTSS VERIFICATION TEST - 1A.
7 Gain access to the RKE/Thatcham Alarm Module C1 harness connector.
While back probing, measure the resistance of the Siren Signal Return circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 8
No®Replace the RKE/Thatcham Alarm Module.
Perform VTSS VERIFICATION TEST - 1A.
8 Disconnect the RKE/Thatcham Alarm Module C1 harness connector.
Measure the resistance of the Siren Signal Return circuit between the RKE/
Thatcham Alarm Module and the VTSS Siren connector.
Is the resistance below 5.0 ohms?All
Ye s®Replace the VTSS Siren.
Perform VTSS VERIFICATION TEST - 1A.
No®Repair the Siren Signal Return circuit for an open.
Perform VTSS VERIFICATION TEST - 1A.
9 Gain access to the RKE/Thatcham Alarm Module C1 harness connector.
While back probing, measure the voltage of the Siren Supply circuit.
Turn the ignition on.
Is the voltage above 10.0 volts?All
Ye s®Go To 10
No®Replace the RKE/Thatcham Alarm Module.
Perform VTSS VERIFICATION TEST - 1A.
953
VEHICLE THEFT/SECURITY
*VTSS SIREN INOP ÐContinued

Symptom:
FR WIPER HI-LO RELAY OPEN
POSSIBLE CAUSES
FUSED B(+) CIRCUIT
COMMON CIRCUIT OPEN
WIPER HI/LOW RELAY
WIPER ON/OFF RELAY
WIPER HI/LOW RELAY CONTROL CIRCUIT OPEN
FCM-ON/OFF RELAY DRIVER OPEN
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Remove the Wiper On/Off Relay from the PDC.
Using a 12-volt test light connected to ground, probe both Fused B(+) circuits in the
PDC.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly at each terminal?All
Ye s®Go To 2
No®Repair the Fused B(+) circuit(s) for an open.
Perform BODY VERIFICATION TEST - VER 1.
2 Install a substitute relay in place of the Wiper On/Off Relay.
Turn the ignition on.
Turn the wipers on.
Does the system operate correctly?All
Ye s®Replace the Wiper On/Off Relay.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
3 Turn the ignition off.
Remove the wiper High/Low Relay from the PDC.
Remove the wiper On/Off Relay from the PDC.
Measure the resistance of the Common circuit between the High/Low Relay and the
On/Off relay in the PDC.
Is the resistance below 10.0 ohms?All
Ye s®Go To 4
No®Repair the Common circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4 Install a substitute relay in place of the Wiper Hi/Low Relay.
Turn the ignition on.
Turn the wipers on.
Does the system operate correctly?All
Ye s®Replace the Wiper Hi/Low Relay.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
956
WINDSHIELD WIPER & WASHER