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 P1831: Solenoid High Control Circuit Group 1 Low Voltage
DTC P1832: Solenoid High Control Circuit Group 1 High Voltage

### Circuit/System Description

The transmission control module (TCM) high side driver 2 is located inside of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The high side driver 2 provides the voltage for the TCM pressure control solenoids and shift solenoids. This fault is handled inside the TCM and no external circuits are involved.

### Conditions for Running the DTC

#### P1831

• | The engine speed is greater than 500 RPM.

• | Ignition voltage is between 8-18 volts.

• | High side driver 2 is enabled.

• | DTC P1831 has not failed this ignition.

#### P1832

DTC P1832 has not failed this ignition.

### Conditions for Setting the DTC

#### P1831

The TCM detects an internal open or short to ground in the high side driver 2 for 3 out of 5 seconds.

#### P1832

The TCM detects an internal short to voltage on the high side driver 2 circuit for 3 out of 5 seconds.

### Action Taken When the DTC Sets

#### P1831

• | DTC P1831 is a Type A DTC.

• | The TCM turns OFF all high side drivers.

• | The TCM turns OFF all solenoids.

• | The TCM commands maximum line pressure.

• | the TCM freezes transmission adaptive functions.

• | The TCM commands the TCC OFF.

• | The TCM allows the vehicle to operate in transmission protection mode.

#### P1832

DTC P1832 is a Type C DTC.

### Conditions for Clearing the DTC

• | DTC P1831 is a Type A DTC.

• | DTC P1832 is a Type C DTC.

### 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.

#### DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

### Circuit/System Testing

1. Clear the DTC and operate the vehicle under the conditions for running and setting the DTC.
2. Observe the High Side Driver CKT Status parameter. The parameter should display OK.

⇒ | If the parameter displays Open, Short to Ground, Short to Voltage, or the DTC resets, replace the control solenoid (w/body and TCM) valve assembly. Refer to Control Module References for replacement, setup, and programming.

### Repair Instructions

Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References for replacement, setup and programming.
2. Perform the Service Fast Learn Adapts.