For 1990-2009 cars

### 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 P0817: Brake Transmission Shift Interlock Solenoid Actuator

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Signal | P0817 | -- | -- | --

### Circuit/System Description

The transmission range switch is an integral part of the transmission control module (TCM). As the gear range selector lever is moved, the state of the starter inhibit circuit may change, causing the circuit to open or close. An open circuit indicates a drive range and a low voltage signal, 0 V, at the body control module (BCM). A closed circuit indicates PARK or NEUTRAL and a high voltage, 12 V, signal at the BCM. The BCM uses the starter inhibit circuit status from the TCM in order to enable starter operation.

### Conditions for Running the DTC

#### P0817

• | The ignition voltage is between 6.0 V and 16.0 V.

• | The transmission is not in emergency mode.

### Conditions for Setting the DTC

#### P0817

• | Start lock is output as "On" and start lock monitor signal indicates "Off" for more than 100 ms.

• | After consecutive 2 times of above detection.

### Action Taken When the DTC Sets

#### P0817

• | DTCs P0817 is Type D DTC.

• | No engine start possible.

### Conditions for Clearing the DTC

#### P0817

• | DTC P0817 is Type D DTC.

• | Start lock is output as "On" and start lock monitor signal indicates "On" and start lock is output as "Off" and start lock monitor signal indicates "Off" for more than 1 s.

### Reference Information

#### Schematic Reference

Automatic Transmission Controls Schematics

#### Connector End View Reference

Component Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Description and Operation

Transmission Component and System Description

#### DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

1. The engine have to start in range position P and N.
2. The engine must not start in all other range positions.

### Circuit/System Testing

#### Dynamic Test

Ignition ON, observe the scan tool Transmission Range Switch parameter while selecting each transmission range: P, R, N, D. Each selected transmission range should correspond to the correct scan tool parameter displayed.

⇒ | If not equal to the specified range, test the starter inhibit circuit for a short to ground, an open/high resistance, or a short to voltage. If the circuit test normal, replace the TCM.

### Component Testing

#### Static Test

1. Ignition OFF, remove the wiring harness connector from K71 Transmission Control Module (TCM).
2. Test the starter inhibit circuit 5 (X1) for a short to ground, an open/high resistance, or a short to voltage.

⇒ | If the circuit tests normal, replace the K71 Transmission Control Module (TCM).

3. Verify the DTC does not reset, if the DTC resets, replace the K9 Body Control Module (BCM).

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | TCM, refer to Control Module References for replacement, setup and programming.

⇒ | Perform the Transmission Adaptive Functions.

• | BCM, refer to Body Control Module Replacement for replacement, setup and programming.