P0705
DTC P0705
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 Circuit
Diagnostic Fault Information
Typical Scan Tool Data
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 (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 (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 (Electrical Diagrams)
Connector End View Reference
Component Connector End Views
Description and Operation
Electronic Component Description (Electronic Component Description) for park/neutral position switch information
Electrical Information Reference
* Circuit Testing
* Connector Repairs
* Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs
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
1. Ignition ON, engine OFF, observe the TR Sw. parameter with a scan tool while selecting each transmission range. The TR Sw. parameter should match each range when selected.
2. Engine idling at normal operating temperature.
3. Observe the TR Sw. A/B/C/P parameter with a scan tool. The TR Sw. A/B/C/P parameter should display LOW/HIGH/HIGH/LOW.
4. Inspect the range selector lever cable and the PNP switch for the correct adjustment.
• If the PNP switch or cable is out of adjustment, refer to Park/Neutral Position Switch Replacement (Service and Repair) .
5. 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.
Circuit/System Testing
1. Turn ON the ignition, leaving the engine OFF. Using a scan tool, observe the TR Sw. parameter while selecting each transmission range. The TR Sw. parameter should match each range when selected.
• If the TR Sw. range on the scan tool matches each selected range, test for intermittent conditions.
2. Inspect the PNP switch assembly and the shift cable for the following conditions:
* Damage
* Loose or missing mounting hardware
* Damaged or stretched cable
• If any of the conditions are found, repair or replace as necessary.
3. Using the scan tool, observe the TR Sw. A/B/C/P parameter The parameter should display LOW/HIGH/HIGH/LOW.
• If the scan tool displays HI for all signal states, repair the open/high resistance in the ground circuit for the PNP switch.
4. Ignition OFF. Disconnect the harness connector at the PNP switch. Ignition ON , engine OFF, observe the TR Sw. A/B/C/P parameter with a scan tool. The scan tool should display HI for all TR Sw. signal circuits.
• If any of the TR Sw. A/B/C/P signal circuits do not display HI, test the appropriate circuit for a short to ground. If all circuits test normal, replace the TCM.
5. Measure the voltage at each TR signal circuit to ground. Each circuit should measure 10-12 volts.
• If the voltage is less than the specified range on any of the circuits, test the affected circuit for an open/high resistance. If all circuits test normal, replace the TCM.
6. If all circuits/connections test normal, rest or replace the PNP switch.
Component Testing
Using a terminal test kit, connect a test lamp between battery positive voltage and any of the TR signal circuits at the PNP switch. Referring to Transmission Range Switch Logic (Transmission Range Switch Logic) will ensure that the test lamp illuminates when the TR signal circuit that is being tested is grounded.
If the test lamp does not illuminate when the circuit is grounded, replace the PNP switch.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
* Park/Neutral Position Switch Replacement (Service and Repair)
* Control Module References for TCM replacement, setup, and programming.