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.

TEST FOR INTERMITTENT CONDITION
NOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

Turn the ignition on.

With the scan tool, record and erase TIPM DTC's.

Cycle the ignition from on to off 3 times.

Turn the ignition on.

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

Does the scan tool display this DTC as active?

Yes
1. Go To 2.
No
1. The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
CHECK THE (D54) CAN B BUS (-) CIRCUIT FOR A SHORT TO GROUND

Fig 1: Measuring Resistance Between Ground & (D54) CAN B Bus (-) Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Totally Integrated Power Module C5 harness connector.

Measure the resistance between ground and the (D54) CAN B Bus (-) circuit.

Is resistance below 1000.0 ohms?

Yes
1. Go To 3.
No
1. Go To 4.
(D54) CAN B BUS (-) CIRCUIT SHORTED TO GROUND

Fig 2: Measuring Resistance Between Ground & (D54) CAN B Bus (-) Circuit
Courtesy of CHRYSLER LLC

Measure the resistance between ground and the (D54) CAN B Bus (-) circuit.

While monitoring the ohmmeter, disconnect each CAN B Bus module one at a time.

NOTE: This is to determine if the circuit is shorted to ground internally within a module or if the circuit is shorted to ground in the harness.

NOTE: Disconnecting an inline connector can eliminate a module or group of modules from the list of possible causes for this fault. Refer to the wring diagrams to assist in diagnosis.

Is resistance below 1000.0 ohms with all the CAN B Bus modules disconnected?

Yes
1. Repair the (D54) CAN B Bus (-) circuit for a short to ground.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Replace the module that when disconnected eliminated the short to ground in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .
CHECK THE (D55) CAN B BUS (+) CIRCUIT FOR A SHORT TO THE (D54) CAN B BUS (-) CIRCUIT

Fig 3: Measuring Resistance Between (D55) CAN B Bus (+) Circuit & (D54) CAN B Bus (-) Circuit
Courtesy of CHRYSLER LLC

Measure the resistance between the (D55) CAN B Bus (+) circuit and (D54) CAN B Bus (-) circuit.

Is resistance below 1000.0 ohms?

Yes
1. Go To 5.
No
1. Inspect the wiring and connectors for damage or shorted circuits. If OK, replace the Totally Integrated Power Module in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .
(D55) CAN B BUS (+) CIRCUIT SHORTED TO THE (D54) CAN B BUS (-) CIRCUIT

Fig 4: Measuring Resistance Between (D55) CAN B Bus (+) Circuit & (D54) CAN B Bus (-) Circuit
Courtesy of CHRYSLER LLC

Measure the resistance between the (D55) CAN B Bus (+) circuit and (D54) CAN B Bus (-) circuit.

While monitoring the ohmmeter, disconnect each CAN B Bus module one at a time.

NOTE: This is to determine if the short together is internal within a module or if the circuits are shorted together.

NOTE: Disconnecting an inline connector can eliminate a module or group of modules from the list of possible causes for this fault. Refer to the wring diagrams to assist in diagnosis.

Is resistance below 1000.0 ohms with all the CAN B Bus modules disconnected?

Yes
1. Repair the (D55) CAN B Bus (+) circuit for a short to the (D54) CAN B Bus (-) circuit.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Replace the module that when disconnected the short together was eliminated, in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .