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Pinpoint Test T : U0151:00

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  1. Automatic Climate Control System for schematic and connector information.

    Normal Operation and Fault Conditions 

    The HVAC. Uses information contained in messages from the RCM sent on the HS-CAN2 for 5 seconds.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    HVAC U0151:00 Lost Communication With Restraints Control Module: No Sub Type Information This DTC sets in the HVAC module if data messages received from the RCM are missing.

    Possible Sources 

    • Vehicle communication bus
    • RCM
    • HVAC control module

  2. T1 CHECK THE COMMUNICATION NETWORK

    • Ignition ON.

    • Using a diagnostic scan tool, perform network test.

    Does the RCM pass the network test? 

    Yes  GO to  T2
    No 

  3. T2 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE RCM (RESTRAINTS CONTROL MODULE) SELF-TEST

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

    Is DTC U3003:16 or DTC U3003:17 recorded? 

    Yes  DIAGNOSE the battery voltage Diagnostic Trouble Codes (DTCs). REFER to: Airbag Supplemental Restraint System (SRS) - Vehicles Without: Rear Seat Side Airbag .
    No  GO to  T3

  4. T3 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE HEATING, VENTILATION, AND AIR CONDITIONING (HVAC) CONTROL MODULE SELF-TEST

    • Check for recorded Diagnostic Trouble Codes (DTCs) from the HVAC module self-test.

    Is DTC U3003:16 or DTC U3003:17 recorded? 

    Yes  GO to Pinpoint Test V 
    No  GO to  T4

  5. T4 RECHECK THE HEATING, VENTILATION, AND AIR CONDITIONING (HVAC) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

    • Clear all Diagnostic Trouble Codes (DTCs).

    • Ignition OFF.

    • Ignition ON.

    • Repeat the HVAC module self-test.

    Is DTC U0151:00 retrieved again? 

    Yes  GO to  T5
    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. T5 CHECK FOR DIAGNOSTIC TROUBLE CODE (DTC) U0151:00 SET IN OTHER MODULES

    • Using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs).

    • Ignition OFF.

    • Wait 10 seconds.

    • Ignition ON.

    • Using a diagnostic scan tool, retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

    Is DTC U0151:00 set in any other modules? 

    Yes  GO to  T6
    No  GO to  T7

  7. T6 CHECK FOR CORRECT RCM (RESTRAINTS CONTROL MODULE) OPERATION

    • Ignition OFF.

    • Disconnect and inspect the RCM 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 RCM 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 On-Line Automotive Service Information System (OASIS) for any applicable Technical Service Bulletins (TSBs). If a Technical Service Bulletin (TSB) exists for this concern, DISCONTINUE this test and FOLLOW Technical Service Bulletin (TSB) instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RCM. REFER to: Restraints Control Module (RCM) .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

  8. T7 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION

    • Ignition OFF.

    • Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).

    • Repair:

      • corrosion (install new connector or terminal - clean module pins)
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary

    • Connect all HVAC control module electrical 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 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 HVAC control module. REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module .
    No  The system is operating correctly at this time. The 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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