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Home >> Dodge and Ram >> 2023 >> ProMaster 2500 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> 948TE/9HP48 - DTCS P1D91-00 To P2802-00 >> DTC Troubleshooting >> P2802-00-Transmission Range Sensor B Circuit Low >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read Transmission Control Module Transmission Control Module (TCM) DTCs and record on the repair order.
    2. Record the Event Data and 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 TCM DTCs and record on the repair order.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. CHECK (T42) TRS SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    1. Measure the resistance between the (T42) TRS signal circuit at the TCM harness connector and ground.

      Is there continuity between the (T42) TRS circuit and ground?

      Yes 

      No 

      • Go To  3
  3. CHECK (T42) TRS SIGNAL CIRCUIT FOR A SHORT ANOTHER CIRCUIT 
    1. Measure the resistance between the (T42) TRS signal circuit and all other circuits in the TCM harness connector.

      Is there continuity between the (T42) TRS circuit and any other circuit?

      Yes 

      No 

      • Go To  4
  4. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all TCM 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 TCM 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 Event and 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 TCM DTCs.

      Did the DTC return?

      Yes 

      • If this Electronic Control Unit (ECU) is being replaced with a new unit, a diagnostic scan tool MUST be used to align the PROXI configuration data into the new ECU. Follow the routine outlined in the diagnostic scan tool for PROXI Configuration Alignment under Body Control Module (BCM) Miscellaneous Functions menu.
      • Replace the Transmission Control Module (TCM) and perform the PROXI Configuration Alignment procedures in accordance with the Service information. Refer to MODULE, TRANSMISSION CONTROL (TCM), REMOVAL .
      • Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST - 948TE 9HP48 .
      • If vehicle does not pass the TRANSMISSION VERIFICATION TEST, replace the TRS in accordance with the Service Information.
      • Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST - 948TE 9HP48 .

      No 

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