DTC Descriptor
DTC P0575: Cruise Control Switch Signal Circuit
Diagnostic Fault Information
Important: Always perform the
Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Circuit/System Description
When a cruise control function switch is applied, the body control module (BCM) detects a predetermined voltage signal on the cruise control set/coast and resume/accelerate switch signal circuit. The BCM sends a GMLAN serial data message to the engine
control module (ECM) indicating that the function has been requested.
Conditions for Setting the DTC
| • | The ECM receives an invalid cruise control switch status GMLAN 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 this diagnostic runs and fails. |
| • | The malfunction indicator lamp (MIL) will not illuminate. |
| • | The ECM records the operating conditions at the time that this diagnostic fails. The ECM stores this information in the Failure Records. |
| • | All of the scan tool cruise control function switch parameters are set to Off. |
Conditions for Clearing the DTC
| • | A last test failed, or the current DTC, clears when the diagnostic runs and does not fail. |
| • | A history DTC clears after 40 consecutive warm-up cycles, if failures are not reported by this or any other emission related diagnostic. |
| • | Use the scan tool in order to clear the DTC. |
Reference Information
Schematic Reference
Cruise Control Schematics
Connector End View Reference
Computer/Integrating Systems Connector End Views
Electrical Information Reference
Circuit/System Testing
Note: Fix any Cruise Control System related DTCs before using this diagnostic.
Important: This DTC may be stored as a history DTC without affecting the operation of the BCM. Do not replace the BCM if this DTC is stored only as a history DTC and is not retrieved as a current DTC.
Using a scan tool, is DTC P0575 current in the ECM?
| ⇒ | If DTC P0575 is current, replace the BCM. |
| ⇒ | If DTC P0575 is not current, the system is OK. |
Repair Instructions
Important: Always perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM replacement, setup, and programming.
