Acadia FWD V6-3.6L (2007)
Cruise Control: Symptom Related Diagnostic Procedures
Symptoms - Cruise Control
Symptoms - Cruise Control
Important: 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:
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There are no DTCs set.
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The module can communicate via the serial data link.
2. Review the system operation in order to understand the system functions. Refer to Cruise Control Description and Operation. See: Testing and
Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System Check - Vehicle
Visual/Physical Inspection
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Inspect for aftermarket devices which can affect the operation of the cruise control system.
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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 in
Diagnostic Aids. See: Testing and Inspection/Component Tests and General Diagnostics
Symptom List
Refer to Cruise Control Inoperative/Malfunctioning in order to diagnose the system.
Cruise Control Inoperative/Malfunctioning
Cruise Control Inoperative/Malfunctioning
Diagnostic Instructions
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Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. See: Testing and Inspection/Initial Inspection and
Diagnostic Overview/Diagnostic System Check - Vehicle
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Review Strategy Based Diagnosis for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Circuit/System Description
The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control switch signal circuit in order to detect
when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit
when a switch is applied. The BCM sends a GMLAN serial data message to the engine control module (ECM) indicating the status of the cruise control
switch.
Conditions for Enabling Cruise Control
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The vehicle speed is greater than 40 km/h (25 mph).
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The vehicle is not in PARK, REVERSE, NEUTRAL, or 1st gear.
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The system voltage is within 9-16 volts.
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The park brake or brakes are not applied.
Diagnostic Aids
Important: Repair any brake system related symptoms and DTCs before performing this diagnostic.
Caution: Refer to Restraint System Service Precautions.
Disable the inflatable restraint steering wheel module when performing this diagnostic table. Refer to SIR Disabling and Enabling.
