P0705

A750F AUTOMATIC TRANSMISSION SYSTEM: P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input)

DTC P0705 - Transmission Range Sensor Circuit Malfunction (PRNDL Input)

DESCRIPTION

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





MONITOR DESCRIPTION

This DTC indicates a problem with the park/neutral position switch or the wire harness in the park/neutral position switch circuit.
For security, the park/neutral position switch detects the shift lever position so that the engine can be started only when the vehicle is in the 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 or 2, the ECM interprets this as a fault in the switch. The ECM will turn on the MIL and store the DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS

One of the following conditions is met: Condition (A), (B) or (C)

Condition (A)

When 2 or more of the following signals are input at the same time







COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT: According to the Data List displayed by Techstream, you can read the values of switches, sensors, actuators and so on without removing parts. Reading the Data List as the first step of troubleshooting is one method to save time.

NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

1. Warm up the engine.
2. Turn the ignition switch OFF.
3. Connect Techstream to the DLC3.
4. Turn the ignition switch ON, and turn the tester main switch ON.
5. Enter the following menus: Powertrain / Engine and ECT / Data List.
6. According to the display on the tester, read the "Data List".

Engine and ECT





PROCEDURE

1. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY





(a) Disconnect the park/neutral position switch connector.
(b) Measure the resistance when the shift lever is moved to each position.
Standard resistance:





NG -- REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY
OK -- Continue to next step.
2. INSPECT SHIFT LOCK CONTROL ECU SUB-ASSEMBLY





(a) Connect the park/neutral position switch connector.
(b) Disconnect the shift lock control ECU connector.
(c) Measure the resistance when the shift lever is moved to each position.
Standard resistance:





NG -- REPLACE SHIFT LOCK CONTROL ECU SUB-ASSEMBLY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)





(a) Connect the shift lock control ECU connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage when the shift lever is moved to each position.
Standard voltage:





HINT: *: The voltage will drop slightly due to illumination of the back up light.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM