9 - 69 EPS (ELECTRIC POWER STEERING) SYSTEM ELEC – + ELEC – + Fault code No. 54 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. 55 Symptom Power supply to the EPS control unit is not normal (High battery voltage). Malfunction in control unit. Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Faulty battery. Replace the battery. Refer to “CHECKING AND CHARGING THE BATTERY” in chapter 3. Turning the main switch to “OFF”.
2 Malfunction in rectifier/regulator. Replace if defective. Refer to “CHARGING SYSTEM”. 3 Malfunction in EPS control unit. Replace the EPS control unit.