A760H Automatic Transmission: Electronic Controlled Automatic Transmission System

A760H AUTOMATIC TRANSMISSION: ELECTRONIC CONTROLLED 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

These DTCs indicate a problem with the park/neutral position switch and the wire harness in the park/neutral position switch circuit.
The park/neutral position switch detects the shift lever position and sends a signal to the ECM.
For security, the park/neutral position switch detects the shift lever position so that engine can be started only when the shift lever is in the P or N position.
The park/neutral position switch sends a signal to the ECM according to the shift position (P, R, N, D, or S). The ECM determines that there is a problem with the switch or related parts if it receives more than 1 position signal simultaneously. 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)





Condition (B)

When shift lever is in S position, one of the following conditions is met






Condition (C)

All of following conditions are met






COMPONENT OPERATING RANGE





WIRING DIAGRAM









INSPECTION PROCEDURE

1. DATA LIST
HINT: According to the Data List displayed by the Techstream, you can read the value of the switch, sensor, actuator and so on without parts removal. Reading the Data List as the first step of troubleshooting is one method to shorten labor 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.

(a) Warm up the engine.
(b) Turn the engine switch off.
(c) Connect the Techstream to the DLC3.
(d) Turn the engine switch on (IG).
(e) Turn on the tester.
(f) Select the item "Powertrain / Engine and ECT / Data List".
(g) According to the display on the tester, read the "Data List".






PROCEDURE

1. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY




(a) Disconnect the park/neutral position switch connector.
(b) Measure resistance according to the value(s) in the table below when the shift lever is moved to each position.
Resistance:






NG -- REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY
OK -- Continue to next step.

2. INSPECT TRANSMISSION CONTROL SWITCH




(a) Connect the park/neutral position switch connector.
(b) Disconnect the transmission control switch connector of shift lock control unit assembly.
(c) Measure resistance according to the value(s) in the table below when the shift lever is moved to each position.
Resistance:






NG -- REPLACE TRANSMISSION CONTROL SWITCH
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)




(a) Connect the transmission control switch connector of shift lock control unit assembly.
(b) Turn the engine switch on (IG), and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.
Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)




(a) Disconnect the ECM connector.
(b) Turn the engine switch on (IG), and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.
Voltage:





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

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