Transmission Control Systems

TROUBLE CODE 33 - VEHICLE SPEED SENSOR 2 (FRONT)





8F1: CHECK OPERATION OF SPEEDOMETER.





8F2: CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION.





8F3: CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION.





8F4: CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION.





8F5: CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION.





8F6: CHECK VEHICLE SPEED SENSOR 2





8F7: PREPARE OSCILLOSCOPE.





8F8: PREPARE SUBARU SELECT MONITOR





8F9: CHECK INPUT SIGNAL FOR TCM





8F10: CHECK VEHICLE SPEED SENSOR 2 USING OSCILLOSCOPE.





8F11: CHECK INPUT SIGNAL FOR TCM USING SUBARU SELECT MONITOR.





8F12: CHECK HARNESS CONNECTOR BETWEEN TCM AND COMBINATION METER.





8F13: CHECK HARNESS CONNECTOR BETWEEN TCM AND COMBINATION METER.





8F14: PREPARE OSCILLOSCOPE.





8F15: PREPARE SUBARU SELECT MONITOR.





8F16: CHECK OUTPUT SIGNAL FOR TCM.








8F17: CHECK INPUT SIGNAL FOR TCM USING OSCILLOSCOPE.





8F18: CHECK INPUT SIGNAL FOR TCM USING SUBARU SELECT MONITOR.





8F19: CHECK POOR CONTACT.

DIAGNOSIS:
- The vehicle speed signal is abnormal.
- The circuit in combination meter is faulty.
- The harness connector between TCM and vehicle speed sensor is in short or open.

TROUBLE SYMPTOM:
Erroneous idling. Engine stalls. Poor driving performance.





WIRING DIAGRAM