Pinpoint Test C: The Boost Gauge Is Inoperative (Shelby GT 500 Only)

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests


Pinpoint Test C: The Boost Gauge Is Inoperative (Shelby GT 500 Only)

Normal Operation

The boost gauge measures the amount of engine boost provided by the supercharger in pounds per square inch. The Instrument Panel Cluster (IPC) receives the boost gauge data from the PCM over the High Speed Controller Area Network (HS-CAN) communication bus. If the boost gauge status message is invalid or missing for more than 5 seconds, the boost gauge indication defaults to zero. DTC U0100:87 is set if the status message is missing. If the message is invalid or missing for less than 5 seconds, the boost gauge displays the last setting based upon the last valid data received. The missing or invalid data can make the gauge appear sluggish or unresponsive to engine boost changes.

This pinpoint test is intended to diagnose the following:

- PCM
- IPC



PINPOINT TEST C: THE BOOST GAUGE IS INOPERATIVE (SHELBY GT 500 ONLY)

-------------------------------------------------
C1 RETRIEVE THE RECORDED PCM DTCs FROM THE KOEO SELF-TEST


- Check for recorded PCM DTCs from the Key ON Engine OFF (KOEO) self-test.
- Are any DTCs retrieved?

Yes
REFER to Computers and Control Systems Information.

No
GO to C2.

-------------------------------------------------
C2 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST


- Check for recorded DTCs from the IPC self-test.
- Are any DTCs retrieved?

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 C3.

-------------------------------------------------
C3 CARRY OUT THE IPC GAUGE ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IPC DataLogger.
- Select IPC boost gauge (TURBO_GAUGE) active command the boost gauge on and off while monitoring the boost gauge.
- Does the boost gauge sweep correctly?

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.

-------------------------------------------------