P0565

DTC P0565

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 P0565 00
- Cruise Control Switch Circuit

Circuit/System Description

The cruise control resume/accel and set/coast switches are an input to the engine control module (ECM). The ECM monitors the cruise control resume/accel and set/coast switch signal circuits. The ECM detects a voltage signal on the cruise control resume/accel and set/coast switch signal circuits when the corresponding switch is applied. This DTC sets if the ECM detects that voltage is present on the cruise control resume/accel or the set/coast switch signal circuits for longer than 1 second, when the cruise on/off switch is in the off position.

Conditions for Running the DTC

* The ignition is ON.
* The cruise control switch is OFF.

Conditions for Setting the DTC

The ECM detects that the resume/accel or the set/coast switch is applied for longer than 1 second when the ECM detects that the cruise on/off switch is OFF.

Action Taken When the DTC Sets

* 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.
* The cruise control system is disabled.

Conditions for Clearing the DTC

* A last test failed, or the current DTC, clears when the diagnostic runs and does fail.
* A history DTC clears after 40 consecutive warm-up cycles, if the failures are not reported by this or any other emission related diagnostic.

Circuit/System Testing

1. Engine ON, cruise control switch ON, verify that the Cruise On/Off Switch parameter reads On.

• If the scan tool parameter reads Off, test the cruise control on switch signal circuit for an open/high resistance. If the circuit tests normal, replace the turn signal/multifunction switch.

2. Ignition OFF, disconnect the harness connector at the turn signal multifunction switch.
3. Engine ON, verify that the Cruise Set/Coast Switch parameter reads Off.

• If the scan tool parameter reads On, test the cruise control set/coast switch signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.

4. Engine ON, verify that the Cruise Resume/Accel. Switch parameter reads Off.

• If the scan tool parameter reads On, test the cruise resume/accel switch signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.

5. If all circuits test normal, test or replace the turn signal/multifunction switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

* Turn Signal Multifunction Switch Replacement
* Control Module References for ECM replacement, setup, and programming Verification Tests