C2402

DTC C2402 MOTOR-ELECTRICAL

COMPONENT LOCATION
Refer to DTC C1235. C1235

GENERAL DESCRIPTION
The HECU supplies battery power to the electric motor with a motor relay which is controlled by the Electronic Control Unit (ECU). The electric motor pump supplies hydraulic pressure to all wheel brake calipers by operating the piston inside the pump.

DTC DESCRIPTION
The ABS ECU monitors the pump motor relay or fuse open, open or short in motor or motor lock and then sets this code if a malfunction is detected.

DTC DETECTING CONDITION





MONITOR ACTUATION TEST
1. Connect scan tool to Data Link Connector (DLC)
2. Ignition "ON" & Engine "OFF".
3. Select the "Actuation Test" mode on the scan tool.
4. Inspect operating status of inlet valve with Actuation Test.





5. Does a inlet valve operate normally?

YES
>Fault is intermittent caused by poor connection in motor circuit or was repaired and HECU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification Of Vehicle Repair" procedure.

No
>Go to "W/Harness Inspection" procedure.

TERMINAL & CONNECTOR INSPECTION
Refer to DTC C1200. C1200

POWER SUPPLY CIRCUIT INSPECTION
1. Ignition "OFF".
2. Disconnect HECU connector.
3. Ignition "ON".
4. Measure voltage between terminal "2" of the HECU harness connector and chassis ground.





5. Is the measured voltage within specifications?

YES
>Go to "Ground Circuit Inspection" procedure.

No
>Check for damaged harness and open or short to GND between the battery terminal(+) and terminal "3" of the HECU harness connector. Check for open or blown 40A ABS fuse referring to "Circuit Diagram". Repair as necessary and then go to "Verification Of vehicle Repair" procedure.

GROUND CIRCUIT INSPECTION
1. Ignition "OFF".
2. Disconnect HECU connector.
3. Measure resistance between terminal "3" of the HECU harness connector and chassis ground.





4. Is the measured resistance within specifications?

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
>Check for damaged harness and poor connection between terminal "1" of the HECU harness connector and chassis ground. Repair as necessary and then go to "Verification Of vehicle Repair" procedure.

VERIFICATION OF VEHICLE REPAIR
Refer to DTC C2308. C2308