Buick Regal: Symptoms - Cruise Control

NOTE: The following steps must be completed before using the symptom tables.

1. Before using the symptom diagnostic table, perform the Diagnostic System Check - Vehicle in order to verify the following conditions:

• There are no DTCs set.
• The module can communicate via the serial data.

2. Review the system operation in order to understand the system functions. Refer to Cruise Control Description and Operation (Without Adaptive Cruise Control) or Cruise Control Description and Operation (With Adaptive Cruise Control).

Visual/Physical Inspection

• Inspect for aftermarket devices which can affect the operation of the Cruise Control System.
• Inspect the accessible system components or the visible system components for obvious damage or for obvious conditions which can cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

• Cruise Control Indicator Malfunction
• Cruise Control Malfunction

CRUISE CONTROL INDICATOR MALFUNCTION

Diagnostic Instructions

• Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle
• Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
• An overview of each diagnostic category can be found here:Diagnostic Procedure Instructions

Circuit/System Description

 For an overview of the component/system, refer to:Cruise Control Description and Operation (Without Adaptive Cruise Control) or Cruise Control Description and Operation (With Adaptive Cruise Control).

Reference Information

Schematic Reference

Cruise Control Wiring Schematics

Connector End View Reference

Component Connector End View Index

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode.

2. Perform the scan tool control function:Instrument Panel Cluster Assembly - Illuminate All Indicators.

3. Verify the component turns On and Off:Cruise Control Indicator.

• If the component does not turn On and Off

Replace the component:Instrument Panel Cluster Assembly

• Go to next step: If the component turns On and Off

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification.

For control module replacement, programming, and setup refer to: Control Module References.

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