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Pinpoint Test M : U0253:00

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  1. M1 VERIFY THE CUSTOMER CONCERN

    • Ignition ON.

    • Verify there is an observable symptom present.

    Is an observable symptom present? 

    Yes  GO to  M2
    No  Clear the DTC. The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

  2. M2 CHECK THE COMMUNICATION NETWORK

    • Using a diagnostic scan tool, perform the network test.

    Does the APIM pass the network test? 

    Yes  GO to  M3
    No  REFER to: Communications Network .

  3. M3 PERFORM THE APIM (SYNC MODULE) SELF-TEST

    • Using a diagnostic scan tool, perform the APIM self-test.

    Are any DTCs (diagnostic trouble codes) recorded? 

    Yes  For vehicles without Sony Sound, REFER to: Information and Entertainment System . For vehicles with Sony Sound, REFER to: Information and Entertainment System .
    No  GO to  M4

  4. M4 CHECK THE GWM (GATEWAY MODULE A) DTCS (DIAGNOSTIC TROUBLE CODES)

    • Using a diagnostic scan tool, check the GWM CMDTCs (continuous memory diagnostic trouble codes).

    Are any DTCs (diagnostic trouble codes) recorded? 

    Yes  REFER to: Communications Network .
    No  GO to  M5

  5. M5 RECHECK THE PAM (PARKING ASSIST CONTROL MODULE) DTCS (DIAGNOSTIC TROUBLE CODES)

    • Using a diagnostic scan tool, clear the DTCs (diagnostic trouble codes).

    • Operate the system and test for normal operation.

    • Check the PAM CMDTCs (continuous memory diagnostic trouble codes).

    Is DTC U0253:00 still present? 

    Yes  GO to  M6
    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.

  6. M6 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0253:00 OR DTC (DIAGNOSTIC TROUBLE CODE) U0253:87 SET IN OTHER MODULES

    • Using a diagnostic scan tool, clear all DTCs (diagnostic trouble codes).

    • Ignition OFF.

    • Ignition ON

    • Wait 10 seconds.

    • Using a diagnostic scan tool, retrieve the CMDTCs (continuous memory diagnostic trouble codes) from all modules.

    Is DTC U0253:00 or DTC U0253:87 set in other modules? 

    Yes  GO to  M7
    No  GO to  M8

  7. M7 CHECK FOR CORRECT APIM (SYNC MODULE) OPERATION

    • Ignition OFF.

    • Disconnect and inspect the APIM and related in-line connectors.

    • 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 APIM and related in-line connectors. Make sure it seats and latches correctly.

    • Wait at least 2 minutes for the APIM to re-initialize.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern install a new APIM. For vehicles without Sony Sound, REFER to: SYNC Module [APIM] . For vehicles with Sony Sound, REFER to: SYNC Module [APIM] .
    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.

  8. M8 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

    • Ignition OFF.

    • Disconnect and inspect all BCM and related in-line connectors.

    • 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 BCM and related in-line connectors. Make sure they seat and latch correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable TSBs (technical service bulletins). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSB addresses this concern, Refer to BCM Hardware Testing .
    No  The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
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