B1A42

B1A42-SECURITY TRANSMITTER SENSOR CIRCUIT SHORTED TOGETHER

B1A42-Security Transmitter Sensor Circuit Shorted Together:

WHEN MONITORED
During the VTSS pre-arm process.

SET CONDITION
If the voltage current is below a specified range this DTC will set.

POSSIBLE CAUSES
- Intrusion sensor transmitter
- (A645) intrusion transmitter sensor signal shorted to (G945) sensor ground
- Intrusion transceiver module

DIAGNOSTIC TEST

1. DETERMINING IF DTC IS CURRENT

NOTE: Diagnose any related Communication DTC(s) before continuing.

With a scan tool, read and record DTC(s).
With the scan tool, clear DTC(s).
Turn the ignition off and remove the key from the ignition.
Lock and close all doors to allow the VTSS to go from pre-arm to armed status and wait one minute.
Disarm the VTSS.
Using the scan tool, read DTC(s).

Q: Does the DTC reset?

YES: Go To 2
NO: DTC is not active at this time. Test complete.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2. INTRUSION SENSOR TRANSMITTER
Disconnect the Intrusion Sensor Transmitter connector.

NOTE: Check connectors - Clean/repair as necessary.

Connect a known good Intrusion Sensor Transmitter.
Turn the ignition on.
With the scan tool, clear DTC(s).
Turn the ignition off and remove the key from the ignition.
Lock and close all doors to allow the VTSS to go from pre-arm to armed status and wait one minute.
Disarm the VTSS.
Using the scan tool, read DTC(s).

Q: Does the DTC reset?

YES: Go To 3
NO: Replace the original Intrusion Sensor Transmitter.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3. CHECK THE (A645) INTRUSION TRANSMITTER SENSOR SIGNAL WIRE FOR A SHORT TO (G945) SENSOR GROUND




Turn the ignition off.
Disconnect the Intrusion Sensor Transceiver connector.
Disconnect the Intrusion Transceiver Module connector.
Measure the resistance between the (A645) Intrusion Transmitter Sensor Signal circuit to the (G945) Sensor Ground circuit in the Intrusion Sensor Transmitter connector.

Q: Is the resistance below 5.0 ohms?

YES: Repair the (A645) Intrusion Transmitter Sensor Signal circuit for a short to the (G945) Sensor Ground circuit.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Replace the Intrusion Transceiver Module.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test