W/Harness Inspection

Automatic Transaxle
P0721 Output Speed Sensor Circuit Range/Performance - Inspection/Repair:_:W/Harness Inspection

Terminal & Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?






Signal Circuit Inspection

Check Output Speed Sensor(External Inspection)
1. Ignition "ON" & Engine "OFF".
2. Disconnect "ATM Control Unit connector.
3. Measure voltage between signal terminal of TCM harness connector and chassis ground.

Specification :Approx. 5V




4. Is the measured voltage within specifications ?





"Check Output Speed Sensor" (Internal Check)
1. Remove "OIL PAN".
2. Ignition "ON" & Engine "OFF".
3. Disconnect "Output Speed Sensor connector.
4. Perform the continuity check in the signal line of output speed sensor.

Specification :Continuity




5. Is the measured resistance within specifications ?






Ground Circuit Inspection

1. Ignition "OFF" & Engine "OFF".
2. Remove "OIL PAN".
3. Disconnect "Output Speed Sensor connector.
4. Measure continuity between ground terminal of Output Speed Sensor and chassis ground.

Specification :Approx. 0Ohms




5. Is the measured resistance within specifications ?