Pinpoint Test U: The Speed Control Indicator Is Never/Always On

U1 CHECK SPEED CONTROL OPERATION
- Test drive the vehicle and operate the speed control
- Does the speed control operate correctly?
- Yes : GO to U2.
- No : REFER to SPEED CONTROL to continue diagnosis of the speed control system.
U2 CARRY OUT THE INSTRUMENT CLUSTER SPEED CONTROL ACTIVE COMMAND USING THE DIAGNOSTIC TOOL
- Key in OFF position.
- Key in ON position.
- Enter the following diagnostic mode on the diagnostic tool: Instrument Cluster Active Command.
- Select the instrument cluster indicator lamp control active command. Trigger the speed control indicator active command on and off. Observe the speed control indicator.
- Does the speed control indicator illuminate when triggered on and turn off when triggered off?
- Yes : GO to U3.
- No : GO to U4.
U3 CHECK FOR CORRECT POWERTRAIN CONTROL MODULE (PCM) OPERATION
- Disconnect all the PCM connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the PCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS . TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
U4 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
- Disconnect all the instrument cluster connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the instrument cluster connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new instrument cluster. REFER to INSTRUMENT CLUSTER . TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.