FUNCTION
- The output shaft speed sensor signal used for A/T control is converted into a vehicle speed signal, which is inputted to the engine control system, speedometer, etc.
TROUBLE JUDGMENT
Check Conditions
- 60 seconds later after the ignition switch has been in "ON" position or the engine has started up.
- Idling signal: OFF
- Engine speed of 2,000 r/min or more.
- Operation under high load (Volumetric efficiency 47.5 % or more).
Judgment Criterion
- Sensor output voltage remains unchanged (no pulse signal is input) for 4 seconds.
PROBABLE CAUSE
- Failed output shaft speed sensor
- Open/short circuit in output shaft speed sensor circuit or loose connector contact
- Failed engine-A/T-ECU
