P0575

DTC P0575

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptor
DTC P0575
- Cruise Control Switch Signal Circuit




Circuit/System Description

When a cruise control function switch is activated, the body control module (BCM) detects a predetermined voltage signal. The BCM sends a serial data message to the engine control module (ECM) indicating the function that has been requested.


Conditions for Running the DTC

The ignition is ON.


Conditions for Setting the DTC

* The ECM receives an invalid cruise control switch status serial data message from the BCM.
* This diagnostic runs continuously.



Action Taken When the DTC Sets

* The cruise control system is disabled.
* The ECM stores the DTC information into memory when the diagnostic runs and fails.
* The malfunction indicator lamp (MIL) will not illuminate.
* The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Failure Records.



Conditions for Clearing the DTC

* The DTC becomes history when the conditions for setting the DTC are no longer present.
* The history DTC clears after 50 consecutive warm-up cycles.



Diagnostic Aids

Using the Failure Records data may help locate an intermittent condition. If you cannot duplicate the DTC, the information in the Failure Records can help determine how many miles since the DTC set. The Fail Counter and Pass Counter can help determine how many ignition cycles that the diagnostic test reported a pass and/or a fail.


Reference Information
Schematic Reference

Cruise Control Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Cruise Control Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information


Circuit/System Verification

1. Verify that DTC B3794 is not set as current.

• If the DTC is set as current , refer to DTC B3794 (B3794) .

2. Road test the vehicle and attempt to engage cruise. Verify that cruise control engages properly and that DTC P0575 is not set.

• If DTC P0575 sets as current, replace the BCM. Clear the DTC, road test the vehicle and attempt to engage cruise. If DTC P0575 resets as current, replace the ECM.

3. If the cruise control system does not operate properly and DTC P0575 is not set, refer to Cruise Control Malfunction (Cruise Control Malfunction) .



Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.


Control Module References (Programming and Relearning) for BCM or ECM replacement, setup, and programming