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 (PSI). The Instrument Cluster (IC) receives the boost gauge data from the PCM over the High Speed Controller Area Network (HS-CAN) communication bus lines. If the boost gauge status message is invalid or missing for more than 5 seconds, the boost gauge indication is zero. If the message is invalid or missing for less than 5 seconds, the boost gauge displays the last valid data received. The missing or invalid data may make the gauge appear sluggish or unresponsive to engine boost changes.

This pinpoint test is intended to diagnose the following:

- PCM
- IC



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

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C1 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND PCM SELF-TESTS


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

Yes
REFER to Computers and Control Systems Information.

No
GO to C2.

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C2 CARRY OUT THE IC GAUGES ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select IC boost gauge (BOOST) active command the boost gauge on 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 IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). TEST the system for normal operation.

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