Pinpoint Test C: DTC U0146

Generic Electronic Module (GEM)

Pinpoint Test C: DTC U0146

Normal Operation

- DTC U0146 (Lost Communication With Gateway (GTWY))- sets when the GEM (Generic Electronic Module) loses communication with the IC (Instrument Cluster) for 5 seconds or longer.

This pinpoint test is intended to diagnose the following:

- Module communication

- IC (Instrument Cluster)

- GEM (Generic Electronic Module)

PINPOINT TEST C : DTC U0146

C1 VERIFY CUSTOMER CONCERN

- Ignition ON.

- Verify that there is an observable symptom present.

Is an observable symptom present?

Yes
GO to C2.

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

C2 CHECK THE COMMUNICATION NETWORK

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: Network Test.

- Carry out the network test.

Does the IC (Instrument Cluster) pass the network test?

Yes
GO to C3.

No
REFER to Information Bus, The IC (Instrument Cluster) Does Not Respond To The Scan Tool.

C3 RETRIEVE THE RECORDED DTCs FROM THE SELF-TEST

- Check for recorded GEM (Generic Electronic Module) DTCs from the self-test.

Is DTC B1317 or DTC B1318 recorded?

Yes
For DTC B1317, GO to Pinpoint Test A. Pinpoint Test A: DTC B1317

For DTC B1318, GO to Pinpoint Test B. Pinpoint Test B: DTC B1318

No
GO to C4.

C4 RECHECK THE GEM (Generic Electronic Module) DTCs

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

- Clear the DTCs. Repeat the GEM (Generic Electronic Module) self-test.

Is DTC U0146 still present?

Yes
INSTALL a new IC (Instrument Cluster). TEST the system for normal operation. REPEAT the GEM (Generic Electronic Module) self-test.

If DTC U0146 is still present, INSTALL a new GEM (Generic Electronic Module). REFER to Generic Electronic Module (GEM) . 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 intermittent fault condition.