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SEC045DB Diagnostic Procedure NHEC1230 1 CHECK TCM FUNCTION Check malfunction of the AT system with CONSULT-II or “O/D OFF” indicator. OK or NG OK 䊳 GO TO 2. NG 䊳 Check AT system. Refer to AT-5. 2 CHECK SPEEDOMETER OPERATION Check if speedometer operates normally. OK or NG OK 䊳 GO TO 3. NG 䊳 Check speedometer and vehicle speed sensor circuit. Refer to EL-125. 3 CHECK VEHICLE SPEED SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch “OFF”. Refer to Wiring Diagram. Continuity should exist. 4. Also check harness for short to ground and short to power. OK or NG OK 䊳 GO TO 5. NG 䊳 GO TO 4. GI MA EM LC FE AT AX SU BR ST RS BT HA SC EL IDX DTC P1574 ASCD VEHICLE SPEED SENSOR Wiring Diagram (Cont’d) EC-625 |