P0703

The engine control module (ECM) monitors the cruise brake switch. The ECM sends brake pedal information to the TCM via the controller area network (CAN) bus [he ECM also determines if the brake pedal information is reliable or not and sends that information to the transaxle control module (TCM). DTC P0703 sets when the TCM receives a message from the ECM that the brake pedal message is unreliable.

DTC PARAMETERS
DTC P0703 sets when the TCM receives a message from the ECM that the brake pedal message is unreliable and:
^ The ignition has been on for at least 3 seconds
^ The TCM and ECM are communicating
^ Trans. Protection Mode is OFF
^ The condition exists for 4 seconds

DTC P0703 diagnostic runs continuously when the above conditions have been met.

DTC P0703 is a type C DTC.

DIAGNOSTIC AIDS
This code does not indicate a problem with the transmission or with the TCM. It does indicate that the ECM is not sending the required information to the TCM. Check for and diagnose any DTCs stored in the ECM and EBTCM related to the brake switch circuits.

Clear DTCs in the TCM after repair is made.