Diagnostic Instructions

DTC Descriptor

DTC C0396 01: Incremental Position Sensor Circuit Short to Battery

DTC C0396 02: Incremental Position Sensor Circuit Short to Ground

DTC C0396 04: Incremental Position Sensor Open Circuit

DTC C0396 05: Incremental Position Sensor Circuit Short to Battery or Open

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Invalid
Incremental Position Sensor Circuit	DTC C0396 02	DTC C0396 04 DTC C0396 05	DTC C0396 01 DTC C0396 05	--

Circuit/System Description

The transfer case shift control module has an input from incremental sensor which shows the speed, transfer case range, and direction of the transfer case mode or range shifts. The incremental sensor is an integral part of the transfer case actuator and can not be replaced independently. This sensor works in conjunction with the RPS sensor to know the exact position of the transfer case actuator. The incremental sensor is less sensitive overall then the RPS, but still indicates important information about the speed and direction of the transfer case two/four wheel drive actuator position. This sensor receives an 8-volt reference signal from the transfer case control module and gets this data back via the transfer incremental impulse signal, as well as the incremental direction signal in order to know is current location.

Conditions for Running the DTC

Conditions for Setting the DTC

Action Taken When the DTC Sets

Conditions for Clearing the DTC

Reference Information

Schematic Reference

Transfer Case Control Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information.

Diagnostic Aids

An open, high resistance, or short to voltage on the incremental sensor direction signal circuit will cause this DTC to set. If the sensor is determined to be bad the entire transfer case actuator will have to be replaced as the incremental sensor is part of the actuator and can not be replaced independently.

Circuit/System Testing

The incremental sensor impulse signal circuit, incremental direction signal circuit, incremental sensor low reference circuit, and the 8-volt reference circuit will need to be check for a short to ground, open, high resistance, and a short to voltage using the following steps.

1. Disconnect the connector at the transfer case actuator and check the 8-volt reference signal on pin G at the transfer case actuator with a DMM, ignition on, the voltage should read 7.8-8.2 volts.

⇒

If the voltage does not read within the specifications then check the 8-volt reference circuit for a short to voltage, open, high resistance, or short to ground. If the circuit checks good and the voltage is out of range replace the transfer case control module, program, and perform the motor learn procedure. If the circuit checks good continue to next step.

2. At the transfer case actuator, with a jumper harness short the 8-volt reference circuit pin G to the incremental impulse signal pin E and note the voltage on the scan tool data display.

⇒	If the voltage does not read 7.8-8.2 volts check the incremental impulse signal circuit for and open, high resistance, short to ground, or short to voltage. If the circuit checks good then go to the next step.

3. Check the incremental direction circuit for an open, short to ground, high resistance, or a short to voltage by probing pin F at the transfer case actuator and pin 14 and transfer case control module connector X2.

⇒	If all circuit test good replace the transfer case actuator and perform the motor learn procedure.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.