P0575

DTC P0575

Diagnostic Instructions

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

DTC Descriptor

DTC P0575 00
- 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 40 consecutive warm-up cycles.

Circuit/System Verification

Important:
* This DTC may be stored as a history DTC without affecting the operation of the BCM. If stored only as a history DTC and not retrieved as a current DTC, do not replace the BCM or ECM.

* 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.

1. Verify that B3794 is not set as current.

^ If B3794 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 the cruise control system does not operate properly and DTC P0575 is not set, refer to Cruise Control Malfunction. Cruise Control Malfunction

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

Repair Instructions

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

Refer to Programming and Relearning. Programming and Relearning