Diagnostic Test

WARNING: This page is about a different car, the 2006 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

1) INTERMITTENT DTC
With the scan tool, erase the current Intrusion Transceiver Module DTC's.

Turn the ignition off.

Arm the VTSS and wait 1 minute.

Disarm the VTSS and turn the ignition on.

Does the scan tool display the same DTC?

Yes
1. Go To 2).
No
1. 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.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE - BODY VERIFICATION TEST - VER 1) , also see (STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING) .
2) DISCONNECT INTRUSION SENSOR AND RECHECK DTC
Disconnect the Intrusion Sensor connector.

Turn the ignition off.

Arm the VTSS and wait 1 minute.

Disarm the VTSS and turn the ignition on.

Does the scan tool display the same DTC?

Yes
1. Go To 3).
No
1. Replace the Intrusion Sensor (Refer to INTRUSION SENSOR - EXPORT) .
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE - BODY VERIFICATION TEST - VER 1) , also see (STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING) .
3) (D122) LIN BUS CIRCUIT SHORT TO BATTERY

Fig 1: CHECKING LIN BUS CIRCUIT SHORTED TO BATTERY
Courtesy of DAIMLERCHRYSLER CORP.

Disconnect the Intrusion Sensor connector.

Disconnect the Intrusion Transceiver Module connector.

Measure the voltage of the (D122) LIN Bus circuit with the ignition switch Off and On.

Is there any voltage present?

Yes
1. Repair the (D122) LIN Bus circuit for a short to voltage.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE - BODY VERIFICATION TEST - VER 1) , also see (STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING) .
No
1. Go To 4).
4) (D122) LIN BUS CIRCUIT SHORT TO GROUND

Fig 2: CHECKING LIN BUS CIRCUIT SHORTED TO GROUND
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition Off.

Measure the resistance between ground and the (D122) LIN Bus circuit.

Is the resistance above 1000 ohms?

Yes
1. Replace the Intrusion Transceiver Module (Refer to REMOVAL) .
  Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE - BODY VERIFICATION TEST - VER 1) , also see (STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING) .
No
1. Repair the (D122) LIN Bus circuit for a short to ground.
2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE - BODY VERIFICATION TEST - VER 1) , also see (STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING) .