Engine Control System

DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT)

CIRCUIT DESCRIPTION

DTC Detection Condition:

The park/neutral position switch detects the shift lever position and sends signals to the ECM.

The park/neutral position switch comes on when the shift lever is in the N or P 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, use the hand-held tester to confirm the PNP switch signal in the "DIAGNOSIS/ENHANCED OBD II/DATA LIST/ALL".

HINT: Read freeze frame data using the hand-held tester or the OBD II scan tool. 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.


MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Condition:

Typical Malfunction Thresholds:

Component Operating Range:

The park/neutral position switch detects the gearshift position and sends a signal to the ECM.

For security, the park/neutral position switch detects the gearshift position so that engine can be started only when the vehicle is in P or N shift position.

When the park/neutral position switch sends more than one signal at a time from switch positions P, R, N, D, 3*1 or 2*1, the ECM interprets this as a fault in the switch. The ECM will turn on the MIL.

HINT:
*1: Gate shift lever type
*2: Shift lever with Multi-mode automatic transmission type

Wiring Diagram:

Step 1:

Step 2:

Step 3:

Step 3 (Continued):

INSPECTION PROCEDURE