Pinpoint Tests AD: The Low Fuel Warning Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests


Pinpoint Test AD: The Low Fuel Warning Indicator Is Never/Always On

Normal Operation

The low fuel indicator turns on when the fuel level reaches a predetermined level, typically one-eighth tank or approximately 80 km (50 miles). The low fuel level warning indicator and fuel gauge are controlled by the Instrument Panel Cluster (IPC) based on the fuel level data provided by the fuel pump module.

This pinpoint test is intended to diagnose the following:

- IPC



PINPOINT TEST AD: THE LOW FUEL WARNING INDICATOR IS NEVER/ALWAYS ON

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AD1 CHECK THE FUEL GAUGE FOR CORRECT OPERATION


- Ignition ON.
- Observe the fuel gauge operation.
- Does the fuel gauge operate correctly?

Yes
GO to AD2.

No
GO to Pinpoint Test B. Pinpoint Test B: Incorrect Fuel Gauge Indication

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AD2 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 low fuel indicator (LOFUELL) active command. Command the low fuel indicator on and off. Observe the low fuel indicator.
- Does the low fuel warning indicator illuminate when commanded on, and turn off when commanded off?

Yes
If equipped with a base IPC, GO to AD3.

If equipped with a message center IPC, GO to AD4.

No
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Service and Repair. TEST the system for normal operation.

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AD3 CHECK THE FUEL LEVEL PERCENT INPUT USING THE IPC DEALER TEST MODE


- Ignition ON.
- Enter Instrument Panel Cluster (IPC) Dealer Test Mode.
- NOTE: The display below uses xxx's to represent a numeric or alpha-numeric value. The value may display the same amount of characters represented by the xxx's or there may be more/less depending on the type of display. For example: FLPS H xxx (base cluster) may display FLPS 85.
- Scroll down to FLPS xxx (base cluster).
- Does the fuel level display 26 or less?

Yes
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Service and Repair. TEST the system for normal operation.

No
The system is operating normally at this time. The fuel level must be below one-eighth tank before the low fuel indicator is turned on.

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AD4 CHECK THE DTE REMAINING MILEAGE DISPLAYED


- Ignition ON.
- Scroll through the information displays in the message center to the DTE display.
- Does the DTE display indicate 80 km (50 miles) or less?

Yes
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Service and Repair. TEST the system for normal operation.

No
The system is operating normally at this time. The fuel level must be below one-eighth tank before the low fuel indicator is turned on.

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