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Pinpoint Test AO: DTC U0100:00

  1. AO1 VERIFY THAT THE SCAN TOOL CAN COMMUNICATE WITH THE PCM 
    • Connect the scan tool.
    • Check that a vehicle session can be established using the scan tool.
    • Can a vehicle session be established? 
    1. Yes  : GO to AO2.
    2. No  : REFER to MODULE COMMUNICATIONS NETWORK article to diagnose no communication with the PCM.
  2. AO2 CHECK THE IPC CONTINUOUS MEMORY DTCs 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: IPC Self-Test.
    • Clear the DTCs. Repeat the IPC self-test.
    • Is DTC U0100:00 retrieved again? 
    1. Yes  : GO to AO3.
    2. 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.
  3. AO3 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST 
    • Check for recorded DTCs from the IPC self-test.
    • Is DTC U3003:16 or DTC U3003:17 recorded? 
    1. Yes  : GO to PINPOINT TEST BF  (U3003:16) or GO to PINPOINT TEST BG  (U3003:17).
    2. No  : GO to AO4.
  4. AO4 CHECK FOR DTC U0100:00 SET IN OTHER MODULES 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self-Test.
    • Retrieve the continuous memory DTCs from all modules.
    • Is DTC U0100:87 set in the Remote Function Actuator (RFA) module (if equipped) or DTC U0100:00 in the Restraints Control Module (RCM)? 
    1. Yes  : INSTALL a new PCM. REFER to ENGINE CONTROLS - ELECTRONIC ENGINE CONTROLS article. CLEAR the DTCs. REPEAT the self-test.
    2. No  : INSTALL a new IPC. REFER to INSTRUMENT PANEL CLUSTER (IPC) . TEST the system for normal operation.
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