Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSDODGE AND RAM20241500 TRXREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 97 ((DRIVETRAIN CONTROL MODULE (DTCM) - ELECTRICAL DIAGNOSTICS - 1500 CLASSIC))DTC TROUBLESHOOTINGC1472-TRANSFER CASE CLUTCH CONTROL CIRCUIT PERFORMANCEDIAGNOSTIC TEST

2024 Dodge and Ram 1500 TRX

Diagnostic Test

2024 Dodge and Ram 1500 TRXSECTION Diagnostic Test

WARNING: This page is about a different car, the 2023 RAM 1500 Classic. However, it is still accessible from the selected car via links, so may be relevant.

CHECK THE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE FOR DTCS
1. Turn the ignition on.
2. With the scan tool, read DTCs in the ABS Module.
  Are any ABS DTCs set?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to DTC INDEX (1 OF 2) and/or DTC INDEX (2 OF 2) .
  No
  - Go To 2
CHECK THE POWER CONTROL MODULE (PCM) FOR DTCS
1. Turn the ignition on.
2. With the scan tool, read DTCs in the PCM.
  Are any PCM DTCs set?
  
  Yes
  - Perform the appropriate diagnostic procedure. and perform the appropriate PCM diagnostic procedures. Refer to DTC INDEX (1 OF 2) and/or DTC INDEX (2 OF 2) .
  No
  - Go To 3
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.
  NOTE:
  Check with the customer on driving terrain (e.g. mud, sand, snow) for set condition.
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. During the test drive, move the Transfer Case Selector Switch (if equipped) to each position several times.
6. With the scan tool, read DTCM DTCs.
  Did the DTC return?
  
  Yes
  - Go To 4
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION diagnostic procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
REPLACE THE TRANSFER CASE CLUTCH PACK
1. Turn the ignition off
2. Replace the Transfer Case Clutch Pack in accordance with the Service Information.
3. Turn the ignition on.
4. With the scan tool, erase DTCs.
5. Test drive vehicle on dry paved road.
6. During the test drive, move the Transfer Case Selector Switch (if equipped) to each position several times in accordance with the Service Information.
7. With the scan tool, read DTCM DTCs.
  Did the DTC return?
  
  Yes
  - Go To 5
  No
  - The new Transfer Case Clutch Pack repaired the problem.
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
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
  - Replace the DTCM in accordance with the Service information. Refer to MODULE, DRIVETRAIN CONTROL (DTCM), REMOVAL and MODULE, DRIVETRAIN CONTROL (DTCM), INSTALLATION .
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
  No
  - The wiring or poor connection problem has been repaired.
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.