B1A41-SECURITY TRANSMITTER SENSOR CIRCUIT OPEN
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
When the VTSS is armed.
- Set Condition:
If the voltage current is below a specified range this DTC will set.
| Possible Causes |
| (A645) INTRUSION TRANSMITTER SENSOR SIGNAL CIRCUIT OPEN |
| (G945) SENSOR GROUND CIRCUIT OPEN |
| INTRUSION SENSOR TRANSMITTER OPEN/MISSING |
| INTRUSION TRANSCEIVER MODULE |
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITIONTurn the ignition on.
With the scan tool, record and erase DTC's.
Turn the ignition off and remove the key from the ignition.
Close all doors and arm the VTSS and wait one minute.
Disarm the VTSS turn the ignition on and wait one minute.
With the scan tool, read DTC's.
Does the scan tool display B1A41–SECURITY TRANSMITTER SENSOR CIRCUIT OPEN?
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 BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
2. CHECK THE (A645) INTRUSION TRANSMITTER SENSOR SIGNAL CIRCUIT VOLTAGE
Disconnect the Intrusion Sensor Transmitter connector.
NOTE: Check connectors - Clean/repair as necessary.
Turn the ignition on.
With the scan tool actuate the Intrusion Sensor Transmitter.
Measure the voltage between (A645) Intrusion Sensor Signal circuit and (G945) Sensor Ground circuit.
Is the voltage above 10.0 volts
Yes
- Go To3
No
- Go To 4
3. CHECK THE INTRUSION SENSOR TRANSMITTER
Turn the ignition off.
Install a known good Intrusion Sensor Transmitter.
Turn the ignition on.
With the scan tool erase DTC's.
Turn the ignition off and remove the key from the ignition.
Close all doors and arm the VTSS and wait one minute.
Disarm the VTSS turn the ignition on and wait one minute.
With the scan tool, read DTC's.
Does the scan tool display B1A41–SECURITY TRANSMITTER SENSOR CIRCUIT OPEN?
Yes
- Replace the Intrusion Transceiver Module in accordance with the Service Information.
- Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Replace the original Intrusion Sensor Transmitter.
- Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
4. CHECK THE (A645) INTRUSION TRANSMITTER SENSOR SIGNAL WIRE
Turn the ignition off.
Disconnect the Intrusion Transceiver Module connector.
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 BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To5
5. CHECK THE (G945) SENSOR GROUND WIRE FOR AN OPEN
Ensure Ignition off.
Measure the resistance of the (G945) 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 in accordance with the Service Information.
- Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Repair the (G945) Sensor Ground circuit for an open.
- Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)