C0359

DTC C0359

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 C0359
- Four Wheel Drive Low Range (4WD low) Discrete Output Circuit Malfunction




Circuit/System Description

The 4WD low circuit is used to notify the powertrain control module (PCM) that the vehicle is in 4WD low range. The PCM supplies 12 volts to this circuit. The transfer case shift control module grounds this circuit when the vehicle is in 4WD low range.


This DTC detects a short-to-ground, short-to-voltage, or an open in the 4WD low circuit.


Conditions for Running the DTC

* The ignition is ON.
* The system voltage is 9-18 volts.



Conditions for Setting the DTC

* After the transfer case shift control module grounds the output, the 4WD low circuit, and reads back a high voltage, the DTC is set. The system will not attempt setting the DTC again during that ignition cycle.
* The transfer case shift control module reads back a high voltage when a low voltage is expected on the 4WD low circuit.



Action Taken When the DTC Sets

* The transmission shift points may be affected.
* The SERVICE 4WD indicator will be latched on for the remainder of the current ignition cycle.



Conditions for Clearing the DTC

* The transfer case shift control module will clear the DTC if the condition for setting the DTC is not currently present.
* A history DTC will clear after 33 consecutive ignition cycles without a fault present.
* History DTCs can be cleared using a scan tool.



Reference Information
Schematic Reference

Transfer Case Control Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Component Connector End Views)
Description and Operation

Transfer Case Description and Operation (Description and Operation)
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)

Scan Tool Reference

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


Repair Instructions

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