9 - 67 EPS (ELECTRIC POWER STEERING) SYSTEM ELEC – + ELEC – + Fault code No. 21 Symptom Speed sensor: open or short circuit detected. Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Connections • Speed sensor coupler • EPS control unit coupler at the wire harness • 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. Starting the engine and acti- vating the vehi- cle speed sensor by oper- ating the vehicle above 5 km/h, or turning the main switch to “OFF”, then to “ON”, and then delet- ing the fault codes.
Refer to “DIAGNOSTIC MODE” and “Deleting fault codes”. 2 Open or short circuit in wire har- ness. • Repair or replace if there is an open or short circuit. • Between speed sensor coupler and EPS control unit coupler. (white–white) 3 Defective speed sensor. • Execute the diagnostic mode. (Code No.21) • Replace if defective. Refer to “SIGNALING SYSTEM”. Fault code No. 22 Symptom No normal signals are received from the ECU. Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Connections • EPS control unit coupler at the wire harness • ECU coupler at the wire harness • 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 wire har- ness. • Repair or replace if there is an open or short circuit. • Between ECU coupler and EPS control unit coupler. (orange/white–orange/white) 3 Malfunction in ECU. Replace the ECU.