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Home >> Jeep >> 2019 >> Renegade High Altitude, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1348 ((Drivetrain Control Module (DTCM) - Electrical Diagnostics)) >> DTC Troubleshooting >> C2502-64 - Status ECM TCFAILSTS Or TRANSM2 TRANSMISSIONFAILSTS Or Brake8 DSTFAILSTS Or Brake8 ESCFAILSTS Or Status ECM EMSFAILSTS Or GE ELECTRICSTEERINGFAILSTS - Signal Plausibility Failure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read DTCs and record on the repair order.
      NOTE:

      Due to the nature of DTCs C2502-64 and C221B-64 setting criteria, these DTC's may set to Active erroneously in the Drivetrain Control Module (DTCM) during a diagnostic session on the Renegade and 500x vehicles. If you encounter both C2502-64, C221B-64 set as active AND you had interrogated the Anti-Lock Brake System (ABS) module in any way with a scan tool, make sure to perform the following actions before initiating repair procedures. This will set the DTC state to Stored and allow the scan tool to erase it (Active DTCs cannot be erased):

      1) Disconnect scan tool from vehicle

      2) Drive the vehicle at least 100ft @ 10 mph or more with all four wheels on the ground.

      3) Connect scan tool and go DIRECTLY to "All DTCs" section without performing any other action. If C2502 and C221B are now stored, clear the faults and do not perform any repairs - the faults were set in error. If the two DTCs are still active, proceed with repair procedure.

    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 

      • Diagnosis complete.
  2. OTHER MODULES SETTING DTCS 
    1. Turn the ignition on.
    2. With the scan tool, read DTCs.

      Are any other modules setting DTCs?

      Yes 

      NOTE:

      DTC C2502-64 only sets when the DTCM detects an implausible message from another module and is used to guide the technician to the Module in question.

      • Diagnose these DTCs in accordance with the Service Information.
      • Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST  .

      No 

      • Go To  3
  3. TRANSMISSION CONTROL MODULE (TCM) 
    1. With the scan tool, check for TCM DTCs.

      Are any TCM DTCs set?

      Yes 

      • Diagnose the TCM DTCs in accordance with the diagnostic information.
      • Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST  .

      No 

      • Go To  4
  4. CHECK THE ABS MODULE FOR DTCS 
    1. With the scan tool, check for ABS DTCs.

      Were any ABS DTCs set?

      Yes 

      • Diagnose the ABS DTCs in accordance with the diagnostic information.
      • Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST  .

      No 

      • Refer to  5.
  5. CHECK THE ELECTRONIC POWER STEERING (EPS) MODULE FOR DTCS 
    1. With the scan tool, check for EPS DTCs.

      Were any EPS DTCs set?

      Yes 

      • Diagnose the EPS DTCs in accordance with the diagnostic information.
      • Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST  .

      No 

      • Go To  6
  6. CHECK THE POWERTRAIN CONTROL MODULE (PCM) FOR DTCS 
    1. With the scan tool, check for PCM DTCs.

      Were any PCM DTCs set?

      Yes 

      • Diagnose the PCM DTCs in accordance with the diagnostic information.
      • Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST  .

      No 

      • Go To  7
  7. 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  .
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