Pinpoint Tests AX: DTC U0137:00

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AX: DTC U0137:00

Normal Operation
- DTC U0137:00 (Lost Communication With Trailer Brake Control Module: No Sub Type Information) - sets in continuous memory if data messages received from the Trailer Brake Control (TBC) module over the High Speed Controller Area Network (HS-CAN) are missing for 5 seconds or longer. For a complete list of all network messages, refer to Module Communications Network Testing and Inspection.

This pinpoint test is intended to diagnose the following:

- TBC module
- IPC

PINPOINT TEST AX: DTC U0137:00

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AX1 VERIFY THE CUSTOMER CONCERN

- Ignition ON.
- Verify there is an observable symptom present.
- Is an observable symptom present?

Yes
GO to AX2.

No
The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

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AX2 CHECK THE COMMUNICATION NETWORK

- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Carry out the network test.
- Does the TBC module pass the network test?

Yes
GO to AX3.

No
REFER to Module Communications Network Testing and Inspection.

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AX3 RETRIEVE THE RECORDED DTCs FROM THE TBC MODULE SELF-TEST

- Check for recorded TBC module DTCs from the self-test.
- Is DTC B1317 or DTC B1318 recorded?

Yes
REFER to Auxiliary Brake System Testing and Inspection.

No
GO to AX4.

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AX4 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST

- Check for recorded IPC DTCs from the self-test.
- Is DTC U3003:16 or DTC U3003:17 recorded?

Yes
For DTC U3003:16, GO to Pinpoint Test BD Pinpoint Tests BD: DTC U3003:16. For DTC U3003:17, GO to Pinpoint Test BE Pinpoint Tests BE: DTC U3003:17.

No
GO to AX5.

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AX5 RECHECK THE IPC DTCs

NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during the Programmable Module Installation (PMI) or the PMI may not have been carried out.

- Clear the DTCs.
- Wait 10 seconds.
- Repeat the IPC self-test.
- Are any DTCs present?

Yes
For DTC U0137:00, INSTALL a new TBC module. REFER to Auxiliary Brake System Service and Repair. CLEAR the DTCs. REPEAT the IPC self-test. If DTC U0137:00 is still present, INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Instrument Panel Cluster (IPC). TEST the system for normal operation.

No
The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

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