P0703

AF23-5 AUTOMATIC TRANSAXLE

DTC P0703

Test 1-7:

Circuit Description with AF23-5 Automatic Transaxle
Brake switch information is sent to the transmission control module (TCM) by the engine control module (ECM) through a communication network called the controller area network (CAN). Two circuits are used to communicate CAN data between the ECM and TCM. A fault in the CAN will not cause DTC P0703 to set by itself. If a CAN fault occurs, other DTCs will set before DTC P0703.

When the ECM sends the TCM an invalid brake switch signal, then DTC P0703 will set. DTC P0703 is a type C DTC.

Conditions for Running the DTC
^ No CAN DTC U2105.
^ Trans. Protection Mode OFF.
^ The ignition has been ON for at least 3.0 seconds.

Conditions for Setting the DTC
The brake switch signal is invalid for 4.0 seconds.

Action Taken When the DTC Sets
^ The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as a Failure Record.
^ The ECM records the operating conditions when the Conditions for Setting the DTC are met. The ECM stores this information as a Freeze Frame.
^ The TCM stores DTC P0703 in TCM history.

Conditions for Clearing the DIC/DTC
^ The TCM clears the SERVICE VEHICLE driver information center (DIC) message request, when the condition no longer exists.
^ A scan tool can clear the DIC/DTC.
^ The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without an emission-related diagnostic fault occurring.
^ The TCM cancels the default actions when the ignition is OFF long enough in order to power down the TCM.