DTC 53

DTC 53: Malfunction of Hydraulic Unit





Solenoid Valve and Motor Power Supply Circuit

CIRCUIT OPERATION
Power is continuously supplied to the ABS-ECU through fusible link number 6 to operate the solenoid valve and motor.

ABS DTC SET CONDITIONS
These codes are displayed if the power supply circuit of solenoid valve or motor is open or shorted.

TROUBLESHOOTING HINTS
- Damaged wiring harness or connector
- Malfunction of the hydraulic unit (integrated with ABS-ECU)

DIAGNOSIS





STEP 1. Check the solenoid valve or motor power supply circuit at ABS-ECU connector A-03.
1. Disconnect connector A-03 and measure at the harness side.
2. Measure the voltage between terminal 9 and ground or 25 and ground.
Q: Is battery positive voltage approximately 12 volts?
YES: Replace the hydraulic unit (integrated with ABS-ECU) and then go to Step 3.
NO: Go to Step 2.








STEP 2. Check the harness wire between fusible link number 5 and ABS-ECU connector A-03.
Q: Is any harness wire between fusible link number 5 and ABS-ECU connector A-02 damaged?
YES: Repair it and after inspecting intermediate connector C-06, inspect the wire. If intermediate connector C-06 is damaged, repair or replace it. Then go to Step 3.
NO: Go to Step 3.

STEP 3. Check the diagnostic trouble codes.
Q: Do the diagnostic trouble codes 41, 51 and 53 reset?
YES: Go to Step 1.
NO: This diagnosis is complete.