Pinpoint Test C: The Boost Gauge Is Inoperative (Shelby GT500 Only)

Instrumentation, Message Center and Warning Chimes

Pinpoint Test C: The Boost Gauge Is Inoperative (Shelby GT500 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 (Instrument Panel Cluster)

PINPOINT TEST C : THE BOOST GAUGE IS INOPERATIVE (SHELBY GT500 ONLY)

C1 RETRIEVE THE RECORDED PCM DTCs FROM THE KOEO (Key ON Engine OFF) 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 (Instrument Panel Cluster) SELF-TEST

- Check for recorded DTCs from the IPC (Instrument Panel Cluster) self-test.

Are any DTCs retrieved?

Yes
For DTC U0100:87, GO to Pinpoint Test AQ Pinpoint Test 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 (Instrument Panel Cluster) GAUGE ACTIVE COMMAND USING THE SCAN TOOL

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: IPC (Instrument Panel Cluster) DataLogger.

- Select IPC (Instrument Panel Cluster) 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. TEST the system for normal operation.

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