C0376

DTC C0376

Circuit Description
The front and rear propshaft speed sensor is a Permanent Magnet (PM)generator. The PM generator produces a pulsing AC voltage. The AC voltage level and number of pulses increases as speed increases. The module converts the pulsating AC voltage to a propshaft RPM which is used for calculations. The propshaft RPM can be displayed with a scan tool.

This DTC detects greater than 10 percent difference in the speed sensor inputs.

Conditions for Running the DTC
^ The ignition is ON.
^ The system voltage is 9 - 16 volts.
^ The transmission is not in Park/Neutral.
^ The engine is running.
^ The front axle is engaged.
^ The front propshaft indicates speed less than 75 mph.

Conditions for Setting the DTC
^ The transfer case shift control module detects continued readings of front and rear propshaft speed signal which do not match. The module is unable to determine propshaft speed.
^ The system logs the DTC if the front and rear propshaft inputs indicates a speed greater than 10% difference for 40 seconds.

Action Taken When the DTC Sets
^ The SERVICE AWD indicator remains illuminated for the remainder of the current ignition cycle.
^ All clutch activation, slip control is disabled.

Conditions for Clearing the DTC
^ The transfer case shift control module clears the DTC if the condition for setting the DTC no longer exists.
^ A history DTC clears after 100 consecutive ignition cycles without a fault present.
^ History DTCs can be cleared using a scan tool.

Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
2. This step determines if DTCs C0300 or C0305 have set.
3. This step helps determine if the transfer case speed sensors are working properly.
4. This step tests to see if the DTC will reset.
5. This step inspects for mismatches and whether speed sensors are wired correctly.
6. This step inspects the transfer case for mechanical failures.

Steps 1 - 8:

DTC C0376