LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2021 >> Gladiator Mojave, Part Time T/Case Control, Automatic Trans >> Repair and Diagnosis >> Transmission >> Transfer Case >> Drivetrain Control Module (DTCM) - DTCS C1477-4B To U0429-00 >> DTC Troubleshooting >> C14AA-12-Transfer Case Motor Position Sensor Supply-Circuit Short To Battery >> Diagnostic Test

Diagnostic Test

  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. With the scan tool, run a Vehicle Scan Report or record the Environmental Data.
    3. With the scan tool, erase DTCs.
    4. Turn the ignition off for at least 10.0 seconds.
    5. Turn the ignition on.
    6. Using the recorded Environmental Data and the When Monitored Conditions, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

    Did the DTC return?

    Yes 

    • Go To  2

    No 

  2. ISOLATE AND CHECK THE (K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the Transfer Case Shift Motor harness connector.
    3. Turn the ignition on.
    4. Measure voltage on the (K504) Drivetrain 5 Volt Supply circuit at the Transfer Case Shift Motor harness connector.

      Is the voltage above 5.5 volts?

      Yes 

      • Repair the (K504) Drivetrain 5 Volt Supply circuit for a short to voltage.
      • Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .

      No 

      • Go To  3
  3. ISOLATE AND CHECK THE (K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT AT THE DRIVETRAIN CONTROL MODULE (DTCM) HARNESS CONNECTOR 
    1. The ignition must be off when performing a resistance check to find a short between circuits.
    2. Isolate the circuit by disconnecting the Electronic Control Unit (ECU) and the component harness connectors containing the circuit being tested. Note:  Use the wiring diagram as a guide to follow the path of the circuit. Check the disconnected connectors and related harnesses for damage, corrosion, and loose fitting terminals.
    3. Connect one lead of the Digital Volt-Ohm Meter (DVOM) to the circuit being tested at the ECU harness connector.
    4. With the other lead of the DVOM probe all other circuits at the ECU harness connector.
    NOTE:

    When back-probing a circuit at a harness connector, always use an appropriate back probing tool to prevent damage to the connector terminals.

    Is there continuity between the circuit being tested and any other circuit?

    Yes 

    • Repair the circuit for a short to another circuit. Use the wiring diagram as a guide to trace the circuits and look for any in-line connectors to help isolate the location of the short.
    • Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .

    No 

    • Go To  4
  4. REPLACE THE TRANSFER CASE SHIFT MOTOR AND CHECK FOR THE DTC TO RETURN 
    1. Replace the Transfer Case Shift Motor in accordance with the Service Information. Refer to MOTOR, SHIFT, EMOVAL AND INSTALLATION .
    2. Connect the Transfer Case Shift Motor and all other harness connectors.
    3. Turn the ignition on.
    4. With the scan tool, erase DTCs.
    5. Using the recorded Environmental Data and the When Monitored conditions, operate the vehicle in the conditions that set the DTC.
    6. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  5

      No 

      • Replacing the Transfer Case Shift Motor corrected the condition.
      • Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
  5. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all DTCM harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Perform a terminal drag test on each connector terminal to verify proper terminal tension.

      Repair any conditions that are found.

    5. Reconnect all DTCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    10. With the scan tool, read DTCM DTCs.

      Did the DTC return?

      Yes 

      No 

      • The wiring or poor connection problem has been repaired.
      • Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
scientia non olet · About LEMON Manuals