Diagnostic Test

WARNING: This page is about a different car, the 2007 Dodge Sprinter. 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.

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) FUSED B(+) CIRCUITS OPEN OR SHORTED
Turn the ignition off.

Using the wiring diagram as a guide, disconnect the appropriate wiring harness connectors.

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

Does the test light illuminate brightly for each circuit?

Yes
1. Go To step 3).
No
1. Repair the Fused B(+) circuits for an open or short.
2. Perform BODY VERIFICATION TEST - VER 1 .
3) FUSED RUN RELAY OUTPUT CIRCUITS OPEN OR SHORTED
Turn the ignition on.

Using a 12-volt test light connected to ground, check the Fused Run Relay Output circuits.

Does the test light illuminate brightly for each circuit?

Yes
1. Go To step 4).
No
1. Repair the Fused Run Relay Output circuits for an open or short.
2. Perform BODY VERIFICATION TEST - VER 1 .
4) GROUND CIRCUITS OPEN
Turn the ignition off.

Using a 12-volt test light connected to 12-volts, check each ground circuit.

Does the test light illuminate brightly for each circuit?

Yes
1. Go To step 5).
No
1. Repair the ground circuit for an open.
2. Perform BODY VERIFICATION TEST - VER 1 .
5) CAN B BUS CIRCUITS OPEN
NOTE: One open circuit will not cause this condition.

Measure the voltage between the all the CAN B Bus (-) circuits and ground.

Measure the voltage between the all the CAN B Bus (+) circuits and ground.

Is there any voltage present on either circuit?

Yes
1. Replace the A/C Heater Control in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Inspect the connector for damage. Repair the CAN B Bus circuits for an open.
2. Perform BODY VERIFICATION TEST - VER 1 .