MVB 4 Speed - Automatic Transmission

DTC P0724

Circuit Description

The purpose of this circuit it to prevent the engine from stalling while driving in lock-up condition when brakes are suddenly applied. When the brake pedal is depressed, this switch sends a signal to the engine control module (ECM). The ECM then cancels the operation of the lock-up clutch while braking is in progress.

This DTC indicates that the stop light switch remains ON. When the stop light remains ON during "stop and go" driving, the engine control module (ECM) interprets this as a fault in the stop light switch and the MIL comes on and the ECM stores the DTC.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0724 Brake Switch"B" Circuit High

Conditions for Running the DTC

The engine is running.

Conditions for Setting the DTC

The ECM will set the DTC if the stops at less than 3 km/h (2 mph) and goes 30 km/h (19 mph) or more 5 times for two driving cycles.

Action Taken When the DTC Sets

* DTC P0724 is a type C DTC.
* The malfunction indicator lamp (MIL) illuminates the first time the diagnostic runs with the fault active.

Conditions for Clearing the MIL/DTC

The DTC will clear when conditions for setting the DTC have been repaired.