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Home >> Fiat >> 2020 >> 124 Spider Classica, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 ((Aw6R31 Automatic Transmission Control Module (TCM) - Electrical Diagnostics)) >> Diagnosis And Testing >> P0973-00 Shift Solenoid 1 Control Circuit Low >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. CHECK TRANSMISSION CONTROL MODULE WIRING 
    1. Go to Key-OFF status.
    2. Disconnect connector B of the Transmission Control Module.
    3. Check whether the terminal of the Shift Solenoid A on Transmission Control Module (AF of connector B) is disconnected, damaged or corroded.

      Is the terminal disconnected, damaged or corroded?

      Yes 

      • Repair or replace the connector or the terminal.
      • Go to Step. Refer to  6.

      No 

      • Go to Step. Refer to  2.
  2. CONFIRM RESISTANCE OF SHIFT SOLENOID A 
    1. Disconnect connector B of the Transmission Control Module.
    2. Measure resistance of Shift Solenoid A between PIN AF of connector B of the Transmission Control Module and the ground on wiring.

      Is resistance between 11 and 15 Ohms ?

      Yes 

      • Go to Step. Refer to  6.

      No 

      • Go to Step. Refer to  3.
  3. CHECK THE WIRING OF SHIFT SOLENOID A 
    1. Go to Key-OFF status.
    2. Disconnect the connector of Shift Solenoid A.
    3. Check whether the terminal of Shift Solenoid A is disconnected, damaged or corroded.

      Is the terminal disconnected, damaged or corroded?

      Yes 

      • Repair or replace the connector or the terminal.
      • Go to Step. Refer to  6.

      No 

      • Go to Step. Refer to  4.
  4. CONFIRM RESISTANCE OF SHIFT SOLENOID A 
    1. Disconnect the connector of Shift Solenoid A.
    2. Measure resistance of solenoid valve between terminal and ground.

      Is resistance between 11 and 15 Ohms ?

      Yes 

      • Go to Step. Refer to  5.

      No 

      • Go to Step. Refer to  6.
  5. CHECK CORRECT OPERATION OF SHIFT SOLENOID A 
    1. Connect the diagnosis equipment to the Automatic transmission node and check correct operation of the Shift Solenoid A.

      Is the Shift Solenoid A working properly?

      Yes 

      • Go to Step. Refer to  6.

      No 

      • Replace the solenoid valve assembly.
      • Go to Step. Refer to  6.
  6. CHECK CORRECT OPERATION OF TRANSMISSION CONTROL MODULE 
    1. Perform the Transmission Control Module error deletion procedure.
    2. Start the engine.
    3. Heat engine and gearbox.
    4. Drive the vehicle with automatic transmission selector in D position and ensure that the gear is shifted from the first to the sixth.
    5. Check whether there is a fault.

      Is the error still present?

      Yes 

      No 

      • End of diagnosis.
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