2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2137

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2137

The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate

and cancel switches via 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 serial data

message to the ECM indicating the status of the cruise control switches.

Conditions for Running the DTC

* The ignition is ON.

* The cruise switch is ON.

Conditions for Setting the DTC

P0564

The ECM detects an invalid voltage signal on the cruise control switch signal circuit for greater than 2 seconds.

P0567

The ECM detects that the Resume switch is applied for longer than 90 seconds.

P0568

The ECM detects that the Set/Coast switch is applied for longer than 90 seconds.

Actions Taken When the DTC Sets

* The malfunction indicator lamp (MIL) will not illuminate.

* The cruise control system is disabled.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.

* A history DTC will clear after 40 malfunction-free ignition cycles have occurred.

Reference Information

Schematic Reference

Cruise Control Schematics (See: Cruise Control/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Cruise Control Description and Operation (See: Cruise Control/Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Engine ON, while rotating the steering wheel to both steering stops, observe the scan tool Cruise Control Switch parameter while pressing each of

the cruise control switches. The parameter should toggle between On, Off, Resume, and Set as the applicable switch is pressed.

Circuit/System Testing

Cruise Control Switch Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the steering wheel controls switch - left.

2. Ignition ON, test for B+ between the B+ circuit terminal 1 and ground.