Celica Liftback L4-107.5 1762cc 1.8L DOHC (7A-FE) (1995)
Transmission Position Switch/Sensor: Testing and Inspection
CIRCUIT DESCRIPTION
The park/neutral position switch goes ON when the shift lever is in the N or P shift position. When it goes ON the terminal NSW of the ECM is
grounded to body ground via the starter relay and theft deterrent ECU, thus the terminal NSW voltage becomes 0.0 volts. When the shift lever is in
the D, 2, L or R position, the park/neutral position switch goes OFF, so the voltage of ECM terminal NSW becomes battery positive voltage, the
voltage of the ECM internal power source.
If the shift lever is moved from the N position to the D position, this signal is used for air-fuel ratio correction and for idle speed control (estimated
control), etc.
NOTE: When the park/neutral position switch is OFF, code "51" is output in the test mode diagnosis. This is not abnormal.
INSPECTION PROCEDURE
HINT: This diagnosis chart is based on the premise that the engine is being cranked under normal conditions. If the engine does not crank,
proceed to the "Matrix Chart Of Problem Symptoms" under Diagnosis By Symptom.