Tests AC: The Performance Shift Warning Indicator Is Never/Always On (Shelby GT 500 Only)

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

Normal Operation
The performance shift warning indicator shares the SVT logo on the tachometer. The performance shift indicator is configurable on or off and uses engine rpm to determine when to illuminate. The SVT logo is normally backlit in red when the performance indicator is configured off. When the performance shift warning indicator is configured on, the SVT logo red backlighting is turned off. When a preset engine rpm is reached, the SVT logo illuminates orange to alert the driver of the selected shift point. The performance shift warning indicator can be configured on or off through the message center. Refer to Driver/Vehicle Information Display, Message Center Configuration.

The performance shift indicator receives the engine rpm status from the PCM over the high speed controller area network (HS-CAN) communication bus lines. When the engine rpm is equal to the preset (configured) shift rpm, the instrument cluster (IC) turns on the performance shift indicator.

This pinpoint test is intended to diagnose the following:
- PCM
- Instrument cluster (IC)

AC1-AC3:

AC3-AC5: