Diagnostic Test

WARNING: This page is about a different car, the 2007 Jeep Patriot and 2007 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.

1) VERIFY DTC IS ACTIVE
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

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

With the scan tool, read active DTC's.

Is this DTC active?

Yes
1. Go To 2).
No
1. Refer to the *STORED LOST COMMUNICATION DTCS test procedure.
2) CHECK FOR ANY OF THE FOLLOWING ACTIVE DTC'S
With the scan tool, read active DTC's from all modules.

NOTE: Check for TIPM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTC's.

Does the scan tool display any active DTC's to the conditions listed above?

Yes
1. Diagnose and repair the DTC. Refer to DIAGNOSTIC CODE INDEX for a complete list of the symptoms.
No
1. Go To 3).
3) VERIFY THAT THE TIRM IS ACTIVE ON THE BUS
Turn the ignition on.

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.

Verify that the TIRM is active on the bus.

Is the TIRM active on the bus?

Yes
1. Replace and program the Totally Integrated Power Module in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Go To 4).
4) (A413) FUSED B(+) CIRCUIT OPEN

Fig 1: Checking (A413) Fused B(+) Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Traffic Information Receiver Module harness connector.

Using a 12-volt test light connected to ground, check the (A413) Fused B(+) circuit.

Does the test light illuminate brightly?

Yes
1. Go To 5).
No
1. Repair the (A413) Fused B(+) circuit for an open or short.
2. Perform BODY VERIFICATION TEST - VER 1 .
5) (Z909) GROUND CIRCUIT OPEN

Fig 2: Checking (Z909) Ground Circuit
Courtesy of CHRYSLER LLC

Using a 12-volt test light connected to 12-volts, check the (Z909) ground circuit.

Does the test light illuminate brightly?

Yes
1. Go To 6).
No
1. Repair the (Z909) ground circuit for an open.
2. Perform BODY VERIFICATION TEST - VER 1 .
6) (D55) AND (D54) CAN B BUS CIRCUITS OPEN

Fig 3: Measuring Voltage Between CAN B Bus (-) & (+) Circuit And Ground
Courtesy of CHRYSLER LLC

NOTE: One open circuit will not cause this condition.

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

Measure the voltage between the (D55) CAN B Bus (+) circuit and ground.

Is there any voltage present on either circuit?

Yes
1. Replace the Traffic Information Receiver Module in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Repair the (D55) and (D54) CAN B Bus circuits for an open. Inspect the connector for damage.
2. Perform BODY VERIFICATION TEST - VER 1 .