Circuit Description
The transfer case shift control module senses rear to front slip, a difference of rear to front wheel speed, attempts to correct the difference by turning on the motor, internal to the transfer case, to apply torque to the front wheels.
Conditions for Setting the DTC
The transfer case shift control module is unable to correct sensed slip for 10 consecutive seconds.
Conditions for Clearing the MIL/DTC
| • | A history DTC will clear after 100 consecutive ignition cycles without a fault present. |
| • | Use a scan tool in order to clear history and current DTCs. |
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
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This test checks for proper operation of the serial data line.
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This test will identify the stored diagnostic trouble codes and whether or not they are current or history.
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The SERVICE indicator (AWD/4WD) lamp should turn off after approximately 2 seconds.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 |
Important: If DTC C0300 or C0305 is also present perform the diagnostic for these DTCs before continuing. Was the Transfer Case Diagnostic System Check performed? | -- | Go to Step 2 | |
Is the encoder motor turning on (buzzing noise)? | -- | Go to Step 5 | Go to Step 3 | |
Did DTC C0310 set? | -- | Go to Step 7 | Go to Step 4 | |
4 | Replace transfer case shift control module. Refer to Transfer Case Shift Control Module Replacement . Has the transfer case shift control module been replaced? | -- | Go to Step 8 | -- |
Does the Encoder Gear Position state change as commanded by the scan tool? | -- | Go to Step 6 | Go to Step 7 | |
6 | Remove transfer case and overhaul. Refer to Transfer Case - New Venture Gear 246 in the Transmission Unit Repair Manual (TURM). Are the repairs complete? | -- | Go to Step 8 | -- |
7 | Replace the transfer case encoder motor. Refer to Motor/Encoder Replacement Is the repair complete? | -- | Go to Step 8 | -- |
8 | Clear all ATC DTCs. Have all the ATC DTCs been cleared? | -- | -- |
