Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read DTCM DTCs and record on the repair order.
2. Record the Environmental Data.
3. With the scan tool, erase DTCs.
4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. With the scan tool, read DTCM DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Go To 5
CHECK THE POWER TRANSFER UNIT (PTU)
1. Check DTC Fail Type in the Recorded Environmental Data.
  Was the DTC Fail Type either Shift into Neutral, Mode Retry Limit, or Fork Block?
  
  Yes
  - Replace the Power Transfer Unit (PTU) in accordance with the service information. Refer to REMOVAL .
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
CHECK THE POWER TRANSFER UNIT ACTUATOR
1. Check DTC Fail Type in the Recorded Environmental Data.
  Was the DTC Fail Type any of the following; Shift into eLocker, 3x5 Exit eLocker, Button Limit, Stall Pass Neutral, Both Actuator Stall, or 3x5 Range Shift?
  
  Yes
  - Replace the Power Transfer Unit Actuator in accordance with the service information. Refer to ACTUATOR, SHIFT .
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4.
CHECK FOR AN ACTIVE DTC
1. With the scan tool, read DTCM DTCs and record on the repair order.
2. Record the Environmental Data.
3. With the scan tool, erase DTCs.
4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. With the scan tool, read DTCM DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Power Transfer Unit (PTU) in accordance with the service information. Refer to REMOVAL .
  - Perform the TRANSFER CASE VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
INTERMITTENT WIRING HARNESS AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
3. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
4. Look for the data to change or for the DTC to reset during the wiggle test.
5. While monitoring the scan tool data related to this circuit, move the selector switch to each position several times.
6. Look for the data to change other than as expected or for the DTC to reset.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete.