Pinpoint Tests AF: The Shift Indicator Is Never/Always On (Shelby GT 500 Only)

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests


Pinpoint Test AF: The Shift Indicator Is Never/Always On (Shelby GT 500 Only)

Normal Operation

The shift indicator is used to inform the driver of shift points that provide the highest fuel economy. The shift indicator is controlled by the Instrument Panel Cluster (IPC) based upon a shift message sent from the PCM over the High Speed Controller Area Network (HS-CAN) communication bus lines.

NOTE: If DTC U0100:87 is set in the IPC, other observable symptoms can be an inoperative speedometer, tachometer or odometer.

This pinpoint test is intended to diagnose the following:

- PCM
- IPC



PINPOINT TEST AF: THE SHIFT INDICATOR IS NEVER/ALWAYS ON (SHELBY GT 500 ONLY)

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AF1 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND PCM SELF-TESTS


- Retrieve the recorded DTCs from the PCM continuous and on-demand self-tests.
- Are any DTCs retrieved?

Yes
REFER to Computers and Control Systems Information.

No
GO to AF2.

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AF2 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 U0100:87, GO to Pinpoint Test AQ. Pinpoint Tests AQ: DTC U0100:87

For all other DTCs, REFER to DTC Charts. Instrumentation, Message Center and Warning Chimes

No
GO to AF3

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AF3 CARRY OUT THE IPC INDICATOR LAMP CONTROL ACTIVE COMMAND


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IPC DataLogger.
- Select the IPC all lamps (ALL_LAMP) active command while monitoring the up shift indicator.
- Does the shift indicator turn on when commanded on and turn off when commanded off?

Yes
INSTALL a new PCM. REFER to Computers and Control Systems. TEST the system for normal operation.

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

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