Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC P0705: Transmission Range (TR) Switch CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
TR Signal A | P0705 | P0705 | -- | -- |
TR Signal B | P0705 | P0705 | -- | -- |
TR Signal C | P0705 | P0705 | -- | -- |
TR Signal P | P0705 | P0705 | -- | -- |
Typical Scan Tool Data
Circuit | Short to Ground | Open/High Resistance | Short to Voltage |
|---|---|---|---|
Operating Conditions: Engine running in Park, normal operating temperature Parameter Normal Range: HI when switch open, LOW when switch grounded. | |||
TR Sw. A/B/C/P | LOW | HI | -- |
Circuit/System Description
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.
Conditions for Running the DTC
The engine is running for 5 seconds.
Conditions for Setting the DTC
The combination of TR switch signals is invalid for 60 seconds. Refer to Transmission Range Switch Logic.
Action Taken When the DTC Sets
| • | DTC P0705 is a type B DTC. |
| • | The TCM commands an alternate coast shift pattern where downshifts occur at higher vehicle speeds while coasting. |
Conditions for Clearing the DTC
DTC P0705 is a type B DTC.
Reference Information
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)
Circuit/System Verification
- 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.
- 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 Logictable.
- Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
- Ignition OFF, disconnect the PNP switch harness connector.
- Ignition ON, verify the scan tool TR. Sw. A/B/C/P parameter is HI/HI/HI/HI.
- Ignition OFF, test for less than 10 ohms between terminal 11 on the harness side and ground.
- If all circuits test normal test or replace the PNP Switch.
| ⇒ | If not the specified value, test each signal circuit for a short to ground. If all circuits test normal, replace the TCM. |
| ⇒ | If greater than the specified value, check the ground circuit for an open/high resistance. |
Component Testing
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 Logictable for each gear selector position.
| • | Terminal 9 |
| • | Terminal 8 |
| • | Terminal 10 |
| • | Terminal 2 |
Important: 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.
| ⇒ | If not the specified value, replace the PNP Switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
| • | Control Module References for TCM replacement, setup, and programming. |
