B1A41

B1A41-SECURITY TRANSMITTER SENSOR CIRCUIT OPEN





For a complete wiring diagram, refer to the Wiring Information. Electrical Diagrams

- When Monitored:
When the Vehicle Theft and Security System (VTSS) is armed.

- Set Condition:
If the voltage current is below a specified range this DTC will set.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Turn the ignition off and remove the key from the ignition.
4. Close all doors and arm the VTSS and wait 1 minute.
5. Disarm the VTSS turn the ignition on and wait 1 minute.
6. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform the BODY VERIFICATION TEST. Body Verification Test

2. CHECK THE (A645) INTRUSION TRANSMITTER SENSOR SIGNAL CIRCUIT VOLTAGE




1. Disconnect the Intrusion Sensor Transmitter connector.

NOTE: Check connectors - Clean/repair as necessary.

2. Turn the ignition on.
3. With the scan tool actuate the Intrusion Sensor Transmitter.
4. Measure the voltage between (A645) Intrusion Sensor Signal circuit and (G945) Intrusion Transmitter Sensor Ground circuit.

Is the voltage above 10.0 volts

Yes

- Go To 3

No

- Go To 4

3. CHECK THE INTRUSION SENSOR TRANSMITTER
1. Turn the ignition is off.
2. Install a known good Intrusion Sensor Transmitter.
3. Turn the ignition on.
4. With the scan tool erase DTCs.
5. Turn the ignition off and remove the key from the ignition.
6. Close all doors and arm the VTSS and wait 1 minute.
7. Disarm the VTSS turn the ignition on and wait 1 minute.
8. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Replace the Intrusion Transceiver Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test

No

- Replace the original Intrusion Sensor Transmitter.
- Perform the BODY VERIFICATION TEST. Body Verification Test

4. CHECK THE (A645) INTRUSION TRANSMITTER SENSOR SIGNAL WIRE




1. Turn the ignition is off.
2. Disconnect the Intrusion Transceiver Module connector.
3. Measure the resistance of the (A645) Intrusion Transmitter Sensor Signal circuit between the Intrusion Sensor Transmitter connector and the Intrusion Transceiver Module connector.

Is the resistance below 5.0 ohms?

Yes

- Repair the (A645) Intrusion Transmitter Sensor Signal circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test

No

- Go To 5

5. CHECK THE (G945) INTRUSION TRANSMITTER SENSOR GROUND WIRE FOR AN OPEN




1. Ensure Ignition is off.
2. Measure the resistance of the (G945) Intrusion Transmitter Sensor Ground circuit from the Intrusion Sensor Transmitter connector to the Intrusion Transceiver Module connector.

Is the resistance below 5.0 ohms?

Yes

- Replace the Intrusion Transceiver Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test

No

- Repair the (G945) Intrusion Transmitter Sensor Ground circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test