Schematic Reference: Cruise Control Schematics Connector End View Reference: Powertrain Control Module Connector End Views in Engine Controls - 4.2L

Did you perform the Cruise Control Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Cruise Control

Turn ON the ignition, with the engine OFF.

Does the CRUISE indicator remain illuminated after the IPC displays test?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

1. Turn OFF the ignition.
2. Install a scan tool.
3. With the scan tool, observe the Cruise Control Parameter in the IPC Inputs/Outputs data list.

Does the Cruise Control Parameter display On?

Go to Step 4

Go to Step 5

Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 8

Go to Step 6

Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 8

Go to Step 7

Important: Program the replacement PCM.

Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls - 4.2L.

Did you complete the replacement?

Go to Step 8

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Important: Program the replacement IPC.

Replace the IPC. Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Consoles.

Did you complete the replacement?

Go to Step 8

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2