Pinpoint Test X: The Mil Is Never/Always On

X1 CARRY OUT THE IPC WARNING LAMPS AND CHIME ACTIVE COMMAND USING THE SCAN TOOL
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IPC DataLogger.
- Select the IPC MIL (MIL_LAMP) active command. Command the MIL on and off while observing the MIL.
- Does the MIL illuminate when selected on and turn off when selected off?
  - Yes : GO to X2.
  - No : INSTALL a new IPC. REFER to INSTRUMENT PANEL CLUSTER (IPC) . TEST the system for normal operation.
X2 RETRIEVE THE RECORDED DTCs FROM THE PCM KOEO SELF-TEST
- Check for recorded PCM DTCs from the Key ON Engine OFF (KOEO) self-test.
- Are any DTCs recorded?
  - Yes : DIAGNOSE all PCM DTCs first. REFER to the INTRODUCTION - GASOLINE MODELS article.
  - No : GO to X3.
X3 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST
- Check for recorded DTCs from the IPC self-test.
- Are any DTCs recorded?
  - Yes : For DTC U0100:00, GO to PINPOINT TEST AQ .
    For all other DTCs, REFER to DIAGNOSTIC TROUBLE CODES (DTC) TABLES .
  - No : If the MIL is never on, the system is operating correctly. If the MIL is always on, INSTALL a new PCM. REFER to ENGINE CONTROLS - ELECTRONIC ENGINE CONTROLS article. TEST the system for normal operation.