P0567

DTC P0567 (4.8L, 5.3L, 6.0L, and 8.1L)

Circuit Description

The cruise control Resume/Accel switch is an input to the throttle actuator control (TAC) module. The TAC module uses the cruise control resume/accel switch signal circuit in order to detect when the driver has requested to accelerate the set vehicle speed or to resume the cruise control system. The TAC module detects a voltage signal on the cruise control resume/accel switch signal circuit when the switch is applied. The TAC module sends a serial data signal to the powertrain control module (PCM) via the UART serial data circuit. This DTC sets if the PCM receives a serial data signal from the TAC module indicating that voltage is present on the cruise control resume/accel switch signal circuit for longer than 90 seconds.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0567 Cruise Control Resume Switch Circuit

Conditions for Running the DTC

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

Conditions for Setting the DTC

The PCM receives a serial data signal from the TAC module indicating that the Resume/Accel switch is applied for longer than 90 seconds.

Action Taken When the DTC Sets

* The PCM stores the DTC information into memory when the diagnostic runs and fails.
* The malfunction indicator lamp (MIL) will not illuminate.
* The PCM records the operating conditions at the time the diagnostic fails. The PCM 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 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 a scan tool in order to clear the DTC.

Diagnostic Aids

* Ensure that the Resume/Accel switch is not stuck or sticking in the engaged position.
* For an intermittent condition, Refer to Testing for Intermittent Conditions and Poor Connections. Component Tests and General Diagnostics

Test Description

Step 1 - Step 9:

The numbers below refer to the step numbers on the diagnostic table.
2. This step determines if condition is present.