4-32 FI SYSTEM DIAGNOSIS DTC No. DETECTED DETECTED FAILURE CONDITION CHECK FOR ITEM Exhaust con- EXCVA position sensor produces fol- EXCVA, EXCVA lead wire/cou- trol valve lowing voltage. pler actuator 0.1 V sensor voltage < 4.9 V In other than the above range, C46 (P1675) is indicated. C46 When no actuator control signal is supplied from the ECM, communica- tion signal does not reach ECM or operation voltage does not reach EXCVA motor, C46 (P1658) is indi- cated. EXCVA can not operate. EXCVA position sensor voltage is EXCVA position sensor circuit H higher than specified value. shorted to VCC or ground circuit P1657 open EXCVA position sensor voltage is EXCVA position sensor circuit L lower than specified value. open or shorted to ground or VCC circuit open When no actuator control signal is EXCVA, EXCVA motor lead supplied from the ECM, communica- wire/coupler E P1658 tion signal does not reach ECM or L operation voltage does not reach EXCVA motor, C46 (P1658) is indi- P cated. EXCVA motor can not operate. C49 PAIR control PAIR control solenoid valve voltage is PAIR control solenoid valve, lead M P1656 solenoid not input to ECM. wire/coupler valve A C60 Cooling fan Cooling fan relay signal is not input to Cooling fan relay, lead wire/cou- S P0480 relay ECM. pler connection