C0274

DTC C0274/14 Short to B+ in ABS Motor Relay Circuit

DESCRIPTION

DTC Detection Condition:

- The ABS motor relays consist of the 2 semiconductor relays and are included in the ABS R/B.
- The ABS MTR relay 1 is turned on after turning the ignition switch to the ON position. If the DTCs in the ABS pump motor circuit are memorized, the ABS CUT relay cuts off the power supply to the ABS MTR relay and performs the fail safe.
- While any of the ABS, BA, TRAC and VSC is operating, the skid control ECU (included in the actuator) turns the ABS MTR relay on to operate the actuator pump motor.
- If the voltage applied to the ABS motor relays (BM) drops the condition that detects the DTCs due to the shortage of the battery or alternator output, the DTCs may be memorized.

Wiring Diagram:

Step 1:

Step 1(continued)-3:

Step 4-5:

Step 6-7:

INSPECTION PROCEDURE

HINT: Start the inspection from step 1 when using the intelligent tester and start from step 2 when not using the intelligent tester.