The transmission range (TR) switch is part of the Park/Neutral Position (PNP) switch and is mounted on the transmission manual shaft. The TR switch is a multi-signal switch. The transmission control module (TCM) supplies ignition voltage to the TR switch on 4 signal circuits, A, B, C, and P. Each gear selector lever position grounds one or more of the signal circuits in a unique pattern. In order to determine the gear range selected by the driver, the TCM compares the voltage combination on the signal circuits to a TR switch combination table stored in memory. Refer to Transmission Range Switch Logic.

The engine is running for 5 seconds.

The combination of TR switch signals is invalid for 60 seconds. Refer to Transmission Range Switch Logic.

DTC P0705 is a type B DTC.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

Description and Operation

Electronic Component Description for park/neutral position switch information

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Special Tools

J 44152 Jumper Harness (20 pins)

1. Ignition ON, engine OFF, observe the scan tool TR Sw. parameter while moving the gear shift lever from Park, to Reverse and through all the ranges. The parameter should match each gear range that is selected.
2. Observe the TR Sw. A/B/C/P parameter while moving the gear shift lever from Park, to Reverse and through all the ranges. The TR Sw. A/B/C/P parameter should correspond with the Transmission Range Switch Logic table.
3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

1. Ignition OFF, disconnect the PNP switch harness connector.
2. Ignition ON, verify the scan tool TR. Sw. A/B/C/P parameter is HI/HI/HI/HI.

⇒	If not the specified value, test each signal circuit for a short to ground. If all circuits test normal, replace the TCM.

3. Ignition OFF, test for less than 10 ohms between terminal 11 on the harness side and ground.

⇒	If greater than the specified value, check the ground circuit for an Open/High resistance.

4. If all circuits test normal test or replace the PNP Switch.

Using a DMM, connect one lead to the PNP Switch ground circuit terminal 11, and the other lead to each of the following PNP Switch signal circuit terminals and compare the readings to the Transmission Range Switch Logic table for each gear selector position.

Note that a DMM reading of less than 10 ohms corresponds to LOW on the logic table. A DMM reading of infinite resistance corresponds to HIGH on the logic table.

Perform the Diagnostic Repair Verification after completing the repair.