C0896

DTC C0896

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 Descriptor
DTC C0896 03
- Device Voltage Range Voltage Below Threshold

DTC P0896 07
- Device Voltage Range Voltage Above Threshold

Diagnostic Fault Information





Circuit/System Description

This DTC is set up to detect a high or low voltage situation. This could indicate a vehicle issue in which all electrical components would be affected. It could also be transfer case control module specific due to poor power or ground connections.

Conditions for Running the DTC

* The ignition is ON.
* System voltage is 7-18.5 volts.

Conditions for Setting the DTC

The voltage is above 16 volts or below 9 volts for 4 seconds.

Action Taken When the DTC Sets

* Shifting is disabled until the voltages change to be within the specifications.
* The SERVICE AWD will not be illuminated.
* If the voltage drops below 7 volts the transfer case shift control module will go offline and a Service AWD indicator would then be present because the transfer case shift control module would no longer be transmitting on the Serial Data Line.

Conditions for Clearing the DTC

* The transfer case shift control module clears the DTC if the conditions for setting the DTC are not currently present.
* A history DTC clears after 40 consecutive warm up cycles without a fault present.
* All DTCs can be cleared using a scan tool.
* Clearing DTCs will also clear failure records.

Diagnostic Aids

* Check failure records for further information on the conditions present when this DTC set.
* Check other modules for voltage related DTCs as this may indicate a system voltage issue.

Reference Information
Schematic Reference

All-Wheel Drive 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)

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. If the voltage is low check the voltage on other vehicle systems to determine if this is a vehicle wide condition and take appropriate actions. If this is transfer case specific check the ignition 3 feed to the transfer case control module and the ground for the transfer case control module for proper connections. The scan tool under transfer case data list can also be used to monitor battery voltage.
2. If the voltage is high, this is likely a vehicle issue such as an alternator problem or the vehicle has been hooked up improperly during a jump start.

Repair Instructions

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