P1831

DTC P1831 or P1832

Diagnostic Instructions

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



DTC Descriptors
DTC P1831
- Pressure Control (PC)/Shift Lock Solenoid Control Circuit Low Voltage

DTC P1832
- Pressure Control (PC)/Shift Lock Solenoid Control Circuit 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 has no seviceable parts. 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 (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Description and Operation

Electronic Component Description (Electronic Component Description)
DTC Type Reference

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

Control Module References (Programming and Relearning) for scan tool information


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 (Programming and Relearning) for replacement, setup, and programming.




Repair Instructions

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

* Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References (Programming and Relearning) for replacement, setup, and programming.
* Perform the Service Fast Learn Adapts (Programming and Relearning) if internal transmission repairs are performed.