Pinpoint Test T: The Upshift Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test T: The Upshift Indicator Is Never/Always On

Normal Operation

The upshift indicator informs the driver of shift points that provide the highest fuel economy. The upshift indicator is controlled by the Instrument Panel Cluster (IPC) based upon an upshift indicator request sent from the PCM over the High Speed Controller Area Network (HS-CAN) communication bus.

If the upshift indicator request is missing or if the data is deemed invalid for less than 5 seconds, the upshift indicator remains in the last indication mode (on or off) based on the last known good request received. If the upshift indicator request is missing or if the data is deemed invalid by the IPC for more than 5 seconds, the IPC sets DTC U0100:00 in continuous memory and defaults the upshift indicator off.

This pinpoint test is intended to diagnose the following:

- PCM
- IPC

PINPOINT TEST T: THE UPSHIFT INDICATOR IS NEVER/ALWAYS ON

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T1 CARRY OUT THE IPC UPSHIFT INDICATOR ACTIVE COMMAND USING THE SCAN TOOL

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

Yes
GO to T2.

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

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T2 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST

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

Yes
GO to Pinpoint Test AM. Pinpoint Tests AM: DTC U0100:00 and P1607:87

No
GO to T3.

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T3 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
REFER to Computers and Control Systems.

No
INSTALL a new PCM. REFER to Electronic Engine Controls Service and Repair. TEST the system for normal operation.

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