Diagnostic Test

WARNING: This page is about a different car, the 2011 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.

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 one minute.
5. Disarm the VTSS turn the ignition on and wait one minute.
6. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2.
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (A645) INTRUSION TRANSMITTER SENSOR SIGNAL CIRCUIT VOLTAGE

Fig 1: Checking Intrusion Transmitter Sensor Signal Circuit Voltage
Courtesy of CHRYSLER LLC
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) Sensor Ground circuit.
  Is the voltage above 10.0 volts
  
  Yes
  - Go To 3.
  No
  - Go To 4.
CHECK THE INTRUSION SENSOR TRANSMITTER
1. Turn the ignition 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 one minute.
7. Disarm the VTSS turn the ignition on and wait one minute.
8. With the scan tool, read DTCs.
  Does the scan tool display B1A41-SECURITY TRANSMITTER SENSOR CIRCUIT OPEN?
  
  Yes
  - Replace the Intrusion Transceiver Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the original Intrusion Sensor Transmitter.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (A645) INTRUSION TRANSMITTER SENSOR SIGNAL WIRE

Fig 2: Checking Intrusion Transmitter Sensor Signal Wire
Courtesy of CHRYSLER LLC
1. Turn the ignition 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. Refer to BODY VERIFICATION TEST .
  No
  - Go To 5.
CHECK THE (G945) SENSOR GROUND WIRE FOR AN OPEN

Fig 3: Checking Sensor Ground Wire For An Open
Courtesy of CHRYSLER LLC
1. Make sure Ignition off.
2. 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 the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the (G945) Sensor Ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .