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) COMMUNICATION WITH GATEWAY
Using the scan tool, attempt to communicate with the Gateway Module.

Can communication be established with the Gateway Module?

Yes
1. Go To 2).
No
1. Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for diagnostic procedures and for further possible causes.
2) GOOD TRIP INDICATED
Turn the ignition on, engine not running.

With the scan tool, read DTCs.

Does the Good Trip Indicator display NO?

Yes
1. Go To 3).
No
1. Refer to the INTERMITTENT CONDITION diagnostic procedure.
2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
3) OPEN J1850 CIRCUIT

Fig 1: MEASURING RESISTANCE OF THE PCI BUS CIRCUIT
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect PCM harness connector.

Measure the resistance of the PCI Bus circuit from the PCM harness connector to the Data Link Connector.

Is the resistance below 5 ohms?

Yes
1. Go To 4).
No
1. Repair the open PCI Bus circuit between the PCM harness connector and the Data Link Connector.
2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
4) PCM
NOTE: Before Continuing: Disconnect the PCM harness connector and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.

Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

If there are no possible causes remaining, view repair.

Repair
1. Replace and program the Powertrain Control Module in accordance with the Service Information. (Refer to STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING) .
2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .