Pinpoint Tests AS: The Charging System Message Center Warning Indicator Is Never/Always On
Instrumentation, Message Center and Warning Chimes
Pinpoint Test AS: The Charging System Message Center Warning Indicator Is Never/Always On
Normal Operation
The charging system indicator is controlled by the Instrument Panel Cluster (IPC) based upon data received from the PCM (non-hybrid) or the DC to DC Converter Control Module (DC/DC) (hybrid) over the High Speed Controller Area Network (HS-CAN) communication bus.
If the charging system message is missing for less than 5 seconds, the charging system message center warning indicator remains in the last state (on or off) based upon the last known good message received. If the charging system message is missing for more than 5 seconds, the IPC sets DTC U0100:00 (non-hybrid) or DTC U0298:00 (hybrid) in continuous memory and defaults the charging system warning indicator on.
NOTE: If DTC U0100:00 is set in the IPC, other observable symptoms may be an inoperative speedometer, tachometer or odometer.
This pinpoint test is intended to diagnose the following:
- Charging system concern
- PCM (non-hybrid)
- DC/DC (hybrid)
- IPC
PINPOINT TEST AS: THE CHARGING SYSTEM MESSAGE CENTER WARNING INDICATOR IS NEVER/ALWAYS ON
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AS1 CHECK THE MESSAGE CENTER OPERATION
- Close all doors and the luggage compartment lid.
- Ignition ON.
- Open the driver door while monitoring the message center displays.
- Does the message center display the door ajar message center warning indicator along with the DRIVER DOOR AJAR text?
Yes
For non-Hybrid, GO to AS2.
For Hybrid, GO to AS4.
No
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Instrument Panel Cluster (IPC). TEST the system for normal operation.
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AS2 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 charging system DTCs recorded?
Yes
REFER to Charging System Testing and Inspection.
No
GO to AS3.
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AS3 CHECK THE CHARGING SYSTEM OPERATION
- Check the charging system operation. Refer to Charging System Testing and Inspection.
- Does the charging system operate correctly?
Yes
GO to AS4.
No
REFER to Charging System Testing and Inspection.
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AS4 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 BF. Pinpoint Tests BF: DTC U0100:00
For DTC U0298:00, GO to Pinpoint Test BW. Pinpoint Tests BW: DTC U0298:00
REFER to DTC Charts. Instrumentation, Message Center and Warning Chimes
No
If the charging system warning indicator is never on, the system is operating correctly at this time.
If the charging system warning indicator is always on for non-Hybrid vehicles, INSTALL a new PCM. REFER to Electronic Engine Controls - 3.5L Service and Repair. TEST the system for normal operation.
If the charging system warning indicator is always on for Hybrid vehicles, REFER to High Voltage Converter/Inverter to diagnose the DC/DC charging system. TEST the system for normal operation.
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