9 - 68 EPS (ELECTRIC POWER STEERING) SYSTEM ELEC – + ELEC – + Fault code No. 41, 42, 43, 45 Symptom EPS motor: open or short circuit detected. Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Connections • EPS motor coupler • Check the coupler for any pins that may have pulled out. • Check the locking condition of the coupler. • If there is a malfunction, repair it and connect the coupler securely. Turning the main switch to “OFF”. 2 Open or short circuit in EPS motor lead. • Repair or replace if there is an open or short circuit. • Between EPS motor and EPS control unit coupler. (red–red) (black–black) 3 Defective EPS motor. Replace if defective.
Refer to “CHECKING THE EPS MOTOR”. Fault code No. 52 Symptom Relay contacts in the EPS control unit are welded together. Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Malfunction in EPS control unit. Replace the EPS control unit. Turning the main switch to “OFF”. Fault code No. 53 Symptom Power supply to the EPS control unit is not normal (low battery voltage). Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Faulty battery. Replace or charge the battery. Refer to “CHECKING AND CHARGING THE BATTERY” in chapter 3. Turning the main switch to “OFF”. 2 Malfunction in rectifier/regulator or charging system.
Replace if defective. Refer to “CHARGING SYSTEM”. 3 Malfunction in EPS control unit. Replace the EPS control unit.