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Test Description

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The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  This step determines if the transfer case control module is supplying the correct 8-volt reference
  2. 3:  This step inspects for proper voltage on the four encoder signal circuits.
  3. 4:  This step tests for an open or high resistance on the encoder signal ground circuit.
  4. 5:  This step tests the encoder signal circuits for an open, short to ground, or short to power.
  5. 6:  This step inspects for a binding sector shaft.
  6. 7:  This step disassembly and overhaul for a binding sector shaft.
DTC C0327

Step Action Value(s) Yes No
Schematic Reference:  Transfer Case Control Schematics  
1 Was the Transfer Case Diagnostic System Check performed? - Go to Step 2  Go to Diagnostic System Check - Transfer Case 
2 
  1. Disconnect the encoder motor pigtail connector
  2. Test the 8-volt reference circuit at the encoder motor pigtail connector, on the module side of the harness, for proper voltage.
Was the voltage within the specified range?		 7-9 V Got to Step 3  Go to Step 5 
3  With the encoder motor pigtail connector still disconnected, test the encoder channel circuits with a DMM.
Are the voltages within the specified range?		 4.8-5.1 V Go to Step 4  Go to Step 5 
4  With the ignition in the OFF position, test the encoder signal ground for an open or high resistance.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 6 
5  Test the suspect circuits for an open or a short to power. Refer to CIRCUIT TESTING and WIRING REPAIRS in Wiring Systems.
Was the condition found and corrected?		 - Go to Step 10  Go to Step 9 
6  Remove the motor/encoder and check the sector shaft for a binding condition. Refer to Transfer Case Motor/Encoder Replacement .
Was the condition found and corrected?		 - Go to Step 7  Go to Step 8 
7  Remove the transfer case for disassembly and repair. Refer to Transfer Case Disassemble .
Is the repair complete?		 - Go to Step 10  -
8 Replace the encoder motor. Refer to Transfer Case Motor/Encoder Replacement .
Is the replacement complete?		 - Go to Step 10  -
9 Replace the transfer case shift control module. Refer to Transfer Case Shift Control Module Replacement .
Is the replacement complete?		 - Go to Step 10  -
10
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 - - System OK
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