Pinpoint Test BP: The Trailer Information Display Is Inoperative
- Normal Operation and Fault Conditions
See Trailer Information Display. REFER to: Message Center - System Operation and Component Description .
If the gear lever position, vehicle speed, ignition status, trailer setup, trailer reverse message request, BLIS trailer tow left or BLIS trailer tow right messages are missing for less than 5 seconds, the IPC defaults the display to its current state based upon the last message received
If the gear lever position, vehicle speed, ignition status, trailer setup, trailer reverse message request, BLIS trailer tow left or BLIS trailer tow right messages are missing for 5 seconds or longer, the IPC sets a DTC for the module in question and defaults the associated display element off or blank.
Possible Sources
- Communication concern
- BCM concern
- GWM concern
- PCM concern
- TCM concern (diesel)
- IPMA concern
- IPC
- BP1 VERIFY THE IPC (INSTRUMENT PANEL CLUSTER) IS SET TO THE TRAILER INFORMATION DISPLAY SCREEN
- Ignition ON.
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NOTE: The IPC and message center navigation can be found in the Owner's Literature.
Using the message center controls, make sure the IPC is set to the trailer information display screen.
Is the IPC set to the trailer information display screen?
Yes GO to BP2 No The trailer information display is operating correctly. The IPC was not set to the correct display screen. - BP2 PERFORM THE PCM (POWERTRAIN CONTROL MODULE) KOEO (KEY ON, ENGINE OFF) SELF-TEST
- Using a diagnostic scan tool, perform the PCMKOEO self-test.
- Check for recorded Diagnostic Trouble Codes (DTCs).
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to the Master DTC Chart. No If equipped with diesel engine, GO to BP3 If not equipped with diesel engine, GO to BP4 - BP3 PERFORM THE TCM (TRANSMISSION CONTROL MODULE) SELF-TEST
- Using a diagnostic scan tool, perform the TCM self-test.
- Check for recorded Diagnostic Trouble Codes (DTCs).
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to the appropriate Automatic Transmission article. No GO to BP4 - BP4 PERFORM THE BCM (BODY CONTROL MODULE) SELF-TEST
- Using a diagnostic scan tool, perform the BCM self-test.
- Check for recorded Diagnostic Trouble Codes (DTCs).
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to the Master DTC Chart. No GO to BP5 - BP5 PERFORM THE IPMA (IMAGE PROCESSING MODULE A) SELF-TEST
- Using a diagnostic scan tool, perform the IPMA self-test.
- Check for recorded Diagnostic Trouble Codes (DTCs).
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to the Master DTC Chart. No GO to BP6 - BP6 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to: Controller Area Network (CAN) Module Communications Network . No GO to BP7 - BP7 CHECK FOR CORRECT IPC (INSTRUMENT PANEL CLUSTER) OPERATION
- Ignition OFF.
- Disconnect and inspect the IPC connector.
- Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Reconnect the IPC connector. Make sure it seats and latches correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new IPC. REFER to: Instrument Panel Cluster (IPC) . No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.