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
- 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 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

* A current DTC clears when the conditions for setting the DTC are no longer present.
* A history DTC clears after 40 consecutive malfunction-free ignition cycles.


Diagnostic Aids

* 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.

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 after completing the diagnostic procedure. Verification Tests