For 1990-2009 cars only
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 C0896 03: Device Voltage Range Voltage Below ThresholdDTC P0896 07: Device Voltage Range Voltage Above Threshold
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Voltage Below Threshold | Voltage Above Threshold |
|---|---|---|---|---|
Device Voltage Range | -- | C0896 03 | C0896 03 | C0896 07 |
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
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information.
Circuit/System Testing
- 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.
- 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 after completing the diagnostic procedure.
