C1605

DTC C1605 CAN HARDWARE ERROR

COMPONENT LOCATION

Refer to DTC C1235. C1235

GENERAL DESCRIPTION

The HECU sends requirement data, such as Torque reduction, the number of fuel cut cylinders, and TCS control requests, to the Engine ECU & TCU through CAN bus line. The Engine ECU performs fuel cut functions according to requests from the HECU and retards ignition timing by torque reduction requests. The TCU maintains current gear positions during TCS control time, in order not to increase power which causes a Kickdown shift.

DTC DESCRIPTION

The HECU checks the CAN control module for normal TCS control, and sets this code if CAN control module malfunction is detected.

DTC DETECTING CONDITION:

COMPONENT INSPECTION

1. Ignition "OFF".
2. Engine "ON".
3. Does warning lamp remain On?

YES
^ Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and then go to "Verification of Vehicle Repair" procedure.

NO
^ Fault is intermittent caused by faulty HECU or was repaired and HECU memory was not cleared. Go to the applicable troubleshooting procedure.

VERIFICATION OF VEHICLE REPAIR

Refer to DTC C1101. C1101