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Home >> Chrysler >> 2021 >> Voyager LXi, Gas >> Repair and Diagnosis >> Transmission >> Automatic Trans >> 948TE/9HP48 Automatic Transmission - DTCS P1731-00 To U1467-00 >> DTC Troubleshooting >> P1DAB-00-Vehicle Speed Undetermined >> Diagnostic Test

Diagnostic Test

  1. CHECK ANTILOCK BRAKE SYSTEM (ABS) MODULE FOR DTCS 
    1. With the scan tool, read ABS Module DTCs and record on the repair order.

      Are any ABS Module DTCs set?

      Yes 

      No 

      • Go To  2
  2. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read 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 Event and 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.

      Did the DTC return?

      Yes 

      • Go To  3

      No 

  3. VISUAL INSPECTION 
    NOTE:

    This code can set due to tire circumference differences and from the front or rear wheels being on a slippery surface while the opposite tires are not.

    NOTE:

    This code may also set on a hard acceleration on loose gravel or during other off road driving conditions.

    1. Check tire pressure of all the tires.
    2. Check for correct tire sizes.
    3. Check tire wear on all the tires.
    4. Ask the customer what the road and driving conditions were like when the fault set.

      Were any problems found?

      Yes 

      • Repair as necessary. (If the DTC set during a front or rear wheel spin condition, no repair is necessary.)
      • Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK POWERTRAIN CONTROL MODULE (PCM) WIRING AND CONNECTIONS 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Vehicle Speed Sensors, ABS Module, and the PCM.
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Vehicle Speed Sensors, ABS Module, and PCM connectors.
    4. Perform any Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

      • Go To  5
  5. 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 

      No 

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