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) TEST FOR INTERMITTENT CONDITION
Turn the ignition on.

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

With the scan tool, select ECU view.

NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.

NOTE: Check the TIPM for any active CAN C hardware DTCs, perform DTC before proceeding.

Does the scan tool display a red X next to the module?

Yes
1. Go To step 2).
No
1. The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
2) (A931) B(+) CIRCUIT OPEN OR SHORTED

Fig 1: CHECKING FUSED B(+) CIRCUIT
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the PCM C1 harness connector.

CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

Using a 12-volt test light connected to ground, check the (A931) B(+) circuit.

Does the test light illuminate brightly?

Yes
1. Go To step 3).
No
1. Repair the (A931) B(+) circuit for an open or short.
2. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 1. (Refer to NGC POWERTRAIN VERIFICATION TEST VER - 1) .
3) (Z130) (Z131) GROUND CIRCUIT OPEN

Fig 2: CHECKING GROUND CIRCUITS
Courtesy of DAIMLERCHRYSLER CORP.

Using a 12-volt test light connected to 12-volts, check each (Z130) and (Z131) ground circuit.

Does the test light illuminate brightly for each circuit?

Yes
1. Go To step 4).
No
1. Repair the ground circuit for an open.
2. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 1. (Refer to NGC POWERTRAIN VERIFICATION TEST VER - 1) .
4) (F20) (F901) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN OR SHORTED

Fig 3: CHECKING FUSED IGNITION SWITCH OUTPUT CIRCUIT
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition on.

Using a 12-volt test light connected to ground, check each (F20) and (F901) Fused Ignition Switch Output circuit.

Does the test light illuminate brightly for each circuit?

Yes
1. Go To step 5).
No
1. Repair the Fused Ignition Switch Output circuit for an open or short.
2. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 1. (Refer to NGC POWERTRAIN VERIFICATION TEST VER - 1) .
5) (D65) CAN C BUS (+) CIRCUIT OPEN

Fig 4: MEASURING RESISTANCE OF CAN C BUS (+) CIRCUIT
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the TIPM C3 harness connector.

Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM connector and the appropriate terminal of the special tool #8815.

Is the resistance below 5.0 ohms?

Yes
1. Go To step 6).
No
1. Repair the (D65) CAN C Bus (+) circuit for an open.
2. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 1. (Refer to NGC POWERTRAIN VERIFICATION TEST VER - 1) .
6) (D64) CAN C BUS (-) CIRCUIT OPEN

Fig 5: MEASURING RESISTANCE OF CAN C BUS (-) CIRCUIT
Courtesy of DAIMLERCHRYSLER CORP.

Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM connector and the appropriate terminal of the special tool #8815.

Is the resistance below 5.0 ohms?

Yes
1. Replace and program the Powertrain Control Module. For removal and installation, refer to the ELECTRONIC CONTROL MODULES - SERVICE INFORMATION article, also see STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING .
2. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 1. (Refer to NGC POWERTRAIN VERIFICATION TEST VER - 1) .
No
1. Repair the (D64) CAN C Bus (-) circuit for an open.
2. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 1. (Refer to NGC POWERTRAIN VERIFICATION TEST VER - 1) .