Component Location
General Description

The HECU sends requirement data, such as torque reduction, the number of fuel cut cylinders, and the ESP control request, to the PCM(ECM & TCM) through CAN bus line. The PCM(ECM) performs the fuel cut function according to a request signal from the HECU and then retards an ignition timing. The PCM(TCM) maintains current gear position during the ESP control period in order not to increase power which causes a Kickdown shift.

DTC Description

The HECU checks the CAN RAM for normal ESP control, and sets this code if a CAN RAM malfunction is detected.

DTC Detecting Condition

Item

Detecting Condition

Possible cause

DTC Strategy

–

CAN RAM monitoring

1.

Faulty HECU

Enable Conditions

–

Monitoring a fault in case of CAN Control Register and message buffer errors after IGN on

Fail Safe

–

Inhibit the ESP control and allow the ABS/EBD control.

–

The ESP warning lamp is activated.

Diagnostic Circuit Diagram
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