Diagnostic Test

WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

1) CHECK FOR ACTIVE DTCS
With the scan tool, read the active DTC's.

Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.

With the scan tool, read the active DTC's.

Does the scan tool display this DTC as active?

Yes
1. Go To 2).
No
1. If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
2) CHECK FRONT CONTROL MODULE DTCs
With the scan tool, read Front Control Module active DTCs

Does the scan tool display any CAN B BUS DTCs - ACTIVE?

Yes
1. Refer to DIAGNOSIS AND TESTING .
No
1. Go To 3).
3) (D55) CAN B BUS (+) CIRCUIT OPEN

Fig 1: Measuring Resistance Of CAN B Bus (+) Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the negative battery cable.

Disconnect the Intrusion Transceiver Module connector.

Disconnect the Front Control Module C1 connector.

Measure the resistance of the (D55) CAN B Bus (+) circuit between the Front Control Module C1 connector and the Intrusion Transceiver Module connector.

Is the resistance below 2.0 ohms?

Yes
1. Go To 4).
No
1. Repair the (D55) CAN B Bus (+) circuit for an open.
2. Perform BODY VERIFICATION TEST - VER 1 .
4) (D54) CAN B BUS (-) CIRCUIT OPEN

Fig 2: Measuring Resistance Of CAN B Bus (-) Circuit
Courtesy of CHRYSLER LLC

Measure the resistance of the (D54) CAN B Bus (-) circuit between the Front Control Module C1 connector and the Intrusion Transceiver Module connector.

Is the resistance below 2.0 ohms?

Yes
1. Replace the Intrusion Transceiver Module in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Repair the (D54) CAN B Bus (-) circuit for an open.
2. Perform BODY VERIFICATION TEST - VER 1 .