Engine Control System

DTC P0705 Transmission Range Sensor Malfunction (PRNDL Input)

CIRCUIT DESCRIPTION

DTC Detection Condition:

The park/neutral position switch comes on when the shift lever is in the N or P shift position. When it comes on, terminal NSW of the ECM is grounded to the body ground via the starter relay, thus the terminal NSW voltage becomes 0 V. When the shift lever is in the D, 2, L or R position, the park/neutral position switch goes off, so the voltage of terminal NSW becomes battery positive voltage and 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.

HINT: After confirming DTC P0705 and P0850 use the hand-held tester to confirm the PNP switch signal from the CURRENT DATA.

Wiring Diagram:

Step 1 - 2:

Step 3:

INSPECTION PROCEDURE

HINT: Read freeze frame data using hand-held tester or OBD II scan tool, as freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.