Pinpoint Tests AD: The Charging System Warning Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AD: The Charging System Warning Indicator Is Never/Always On (Fusion/Milan Non-Hybrid)

Normal Operation

The charging system indicator is controlled by the Instrument Panel Cluster (IPC) based upon data received from the PCM 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 indicator remains in the last indication mode (on or off). If the charging system message is missing for more than 5 seconds, the IPC sets DTC U0100:00 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
- IPC


PINPOINT TEST AD: THE CHARGING SYSTEM WARNING INDICATOR IS NEVER/ALWAYS ON (FUSION/MILAN NON-HYBRID)

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AD1 CARRY OUT THE IPC INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL

- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IPC DataLogger .
- Select the IPC charging system warning indicator (CHARGE_LMP) active command. Command the charging system warning indicator on and off while observing the charging system warning indicator.
- Does the charging system warning indicator illuminate when commanded on, and turn off when commanded off?

Yes
GO to AD2.

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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AD2 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 AD3.

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AD3 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 AD4.

No
REFER to Charging System Testing and Inspection.

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AD4 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST

- Check for recorded DTCs from the IPC self-test.
- Is DTC U0100:00 recorded?

Yes
GO to Pinpoint Test BF. Pinpoint Tests BF: DTC U0100:00

No
INSTALL a new PCM. TEST the system for normal operation.

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