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Home >> Jeep >> 2018 >> Wrangler Unlimited Moab >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Transmission Control Module (TCM) - DTCS P1D91-00 To U1477-00 >> DTC Troubleshooting >> P1DD2-00-Torque Request Signal From TCM Denied >> Diagnostic Test
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Diagnostic Test

  1. CHECK FOR BODY CONTROL MODULE (BCM) CONTROLLER AREA NETWORK (CAN) BUS DTCS 
    1. With the scan tool, read BCM DTCs.

      Are any BCM CAN bus DTCs set?

      Yes 

      No 

      • Go To  2
  2. CHECK FOR POWERTRAIN CONTROL MODULE (PCM) DTCS 
    1. With the scan tool, read PCM DTCs.

      Are any PCM DTCs set?

      Yes 

      No 

      • Go To  3
  3. CHECK FOR OTHER TRANSMISSION CONTROL MODULE (TCM) DTCS 
    1. With the scan tool, read TCM DTCs and record on the repair order.

      Are any other TCM DTCs set?

      Yes 

      No 

      • Using the schematics as a guide, check the TCM connector and all related in-line connector terminals for corrosion, damage, or pushed out terminals. Pay particular attention to the power and ground circuits. If no problems are found, replace and program the TCM in accordance with the Service Information. Refer to MODULE, TRANSMISSION CONTROL (TCM), REMOVAL AND INSTALLATION .
      • Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .