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Automatic Transmission - MVB 4 Speed




DTC P0705

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptor
DTC P0705
- Transmission Range (TR) Switch Circuit

Diagnostic Fault Information






Circuit/System Description

The park/neutral position (PNP) switch detects the gear shift lever position and sends the appropriate signals to the powertrain control module (PCM). The PCM will only allow engine start, crank, in the park or neutral position. A fused ignition voltage is provided by the instrument panel fuse block to the park/neutral position switch. Depending on the gear shift lever position, ignition voltage will be directed to the appropriate signal circuit to the PCM. When the gear shift lever is in the park or neutral position, ignition voltage will also be directed to the start relay to enable engine starting.

Conditions for Running the DTC

* Ignition ON
* Battery voltage is 10.5 V or greater

Conditions for Setting the DTC

* All transmission range selector switch inputs are inactive.
* Two or more of the transmission range selector switch inputs are active at the same time.
* The park neutral switch input is active while any of the following transmission range selector switch inputs are active:

- Park
- Drive
- 2
- Low

Action Taken When the DTC Sets

* DTC P0705 is a type B DTC.
* Engine start disabled.

Conditions for Clearing the DTC

DTC P0705 is a type B DTC.

Diagnostic Aids

The battery must be fully charged. Refer to Battery Inspection/Test (Battery Inspection/Test).

Reference Information
Schematic Reference

Automatic Transmission Controls Schematics (Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Mechanical Component Description (Mechanical Component Description)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference

Powertrain Control Module Scan Tool Information (Scan Tool Testing and Procedures) for scan tool information

Circuit/System Verification

1. Ignition ON, verify with a scan tool the park/neutral position (PNP) switch displays park-neutral when in either park or neutral position, and in-gear when not in park or neutral position.
2. Perform the range selector lever cable adjustment. Refer to Range Selector Lever Cable Adjustment (Adjustments).
3. Perform the PNP switch adjustment. Refer to Park/Neutral Position Switch Adjustment (1. Park/Neutral Position Switch Adjustment).
4. 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

1. Disconnect the PNP switch connector harness.
2. Ignition ON, test for 11-14 V between terminal 2 on the PNP switch harness connector and ground.

• If not within the specified value, test the B+ circuit for a short to ground or an open/high resistance.

3. Ignition OFF, connect the PNP switch harness connector.
4. Ignition OFF, disconnect the X2 connector at the PCM.
5. Ignition ON, verify that a test lamp illuminates in park, and does not illuminate in reverse, neutral, drive, second or low gear position, between the signal circuit terminal 73 and ground.

• If the test lamp does not illuminate in park position, test the signal circuit for a short to ground, or an open/high resistance. If the circuit tests normal, replace the PNP switch.

• If the test lamp illuminates in reverse, neutral, drive, second or low gear position, test the signal circuit for a short to voltage. If the circuit tests normal replace the PNP switch.

6. Ignition ON, verify that a test lamp illuminates in reverse, but does not illuminate in park, neutral, drive, second or low gear position, between the signal circuit terminal 53 and ground.

• If the test lamp does not illuminate in reverse position, test the signal circuit for a short to ground, or an open/high resistance. If the circuit tests normal, replace the PNP switch.
• If the test lamp illuminates in park, neutral, drive, second or low gear position, test the signal circuit for a short to voltage. If the circuit tests normal replace the PNP switch.

7. Ignition ON, verify that a test lamp illuminates in neutral, but does not illuminate in park, reverse, drive, second or low gear position, between the signal circuit terminal 54 and ground.

• If the test lamp does not illuminate in neutral position, test the signal circuit for a short to ground, or an open/high resistance. If the circuit tests normal, replace the PNP switch.

• If the test lamp illuminates in park, reverse, drive, second or low gear position, test the signal circuit for a short to voltage. If the circuit tests normal replace the PNP switch.

8. Ignition ON, verify that a test lamp illuminates in drive and does not illuminate in park, reverse, neutral, second or low gear position, between the signal circuit terminal 56 and ground.

• If the test lamp does not illuminate in drive, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the PNP switch.

• If the test lamp illuminates in park, reverse, or neutral, second or low gear position, test the signal circuit for a short to voltage. If the circuit tests normal, replace the PNP switch.

9. Ignition ON, verify that a test lamp illuminates in second gear position and does not illuminate in park, reverse, neutral, drive or low gear position, between the signal circuit terminal 55 and ground.

• If the test lamp does not illuminate in second gear position, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the PNP switch.

• If the tests lamp illuminates in park, reverse, neutral, drive, or low gear position test the signal circuit for a short to voltage. If the circuit tests normal, replace the PNP switch.

10. Ignition ON, verify that a test lamp illuminates in low gear position and does not illuminate in park, reverse, neutral, drive or second gear position, between the signal circuit terminal 74 and ground.

• If the test lamp does not illuminate in low gear position, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the PNP switch.

• If the tests lamp illuminates in park, reverse, neutral, drive, or second gear position test the signal circuit for a short to voltage. If the circuit tests normal, replace the PNP switch.

11. If all circuits test normal, replace the PCM.

Component Testing

1. Disconnect the PNP switch harness connector.
2. Test for less than 1 ohm in park position, and greater than 10 ohm in neutral, reverse, drive, second and low gear positions, between terminals 2 and 6 of the PNP switch.

• If not within the specified values, replace the PNP switch.

3. Test for less than 1 ohm in reverse position, and greater than 10 ohm in park, neutral, drive, second and low gear positions, between terminals 1 and 2 of the PNP switch.

• If not within the specified values, replace the PNP switch.

4. Test for less than 1 ohm in neutral position, and greater than 10 ohm in park, reverse, drive, second and low gear positions, between terminals 2 and 9 on the PNP switch.

• If not within the specified values, replace the PNP switch.

5. Test for less than 1 ohm in drive, and greater than 10 ohm in park, reverse, neutral, second and low gear positions, between terminals 2 and 7 of the PNP switch.

• If not within the specified values, replace the PNP switch.

6. Test for less than 1 ohm in second gear position, and greater than 10 ohm in park, reverse, neutral, drive and low gear position between terminals 2 and 3 of the PNP switch.

• If not within the specified values, replace the PNP switch.

7. Test for less than 1 ohm in low gear position, and greater than 10 ohm in park, reverse, neutral, drive and second gear position between terminals 2 and 8 of the PNP switch.

• If not within the specified values, replace the PNP switch.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic repair.

* Range Selector Lever Cable Replacement (Service and Repair)
* Park/Neutral Position Switch Adjustment (1. Park/Neutral Position Switch Adjustment)
* Park/Neutral Position Switch Replacement (MVB 4 Speed - Automatic Transmission)
* Powertrain Control Module Replacement (Service and Repair)
* Powertrain Control Module Programming and Setup (Testing and Inspection)

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