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 C0896 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 | -- | -- | DTC C0896 03 | DTC 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 do to poor power or ground connections.
Conditions for Running the DTC
| • | The ignition is ON. |
| • | System voltage is 10.5-18.5 volts. |
Conditions for Setting the DTC
The voltage is above 18.5 volts or below 10.5 volts for 15 seconds.
Action Taken When the DTC Sets
| • | Shifting is disabled until the voltages change to be within the specifications. |
| • | The SERVICE 4WD will illuminate for the remainder for the ignition cycle. |
Conditions for Clearing the DTC
| • | The transfer case shift control module clears the DTC if the condition for setting the DTC is not currently present. |
| • | A history DTC clears after 40 consecutive warm up cycles without a fault present. |
| • | History DTCs can be cleared using a scan tool. |
Reference Information
Schematic Reference
Transfer Case Control Schematics
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information.
Diagnostic Aids
Perform the motor learn procedure before normal operation will occur.
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.
- 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.
- After the condition is corrected perform the motor learn procedure.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
