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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6T40 (MNH MNK) Or 6T45 (MHG) - Diagnostic Information And Procedures >> Diagnostic Information And Procedures >> DTC P0716, P0717, P07BF, Or P07C0: Input Speed Sensor >> Circuit/System Testing

Circuit/System Testing

  1. Ignition/Vehicle - Off
  2. Remove the component:Control Valve Body Cover
  3. Connect the electrical connector: X1 @Q8 Control Solenoid Valve Assembly
  4. Disconnect the electrical connector:X3 @Q8 Control Solenoid Valve Assembly - B14C Transmission Input Shaft Speed Sensor
  5. Ignition - On / Vehicle - In Service Mode
  6. Verify the scan tool parameter:ISS/OSS Supply Voltage=OK
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: X4 @Q8 Control Solenoid Valve Assembly - B14A Transmission Output Shaft Speed Sensor
    3. Verify the condition does not exist:Contamination with metallic debris@Electrical Connector - X3 & X4
      • If a condition exists - Repair or replace as necessary
      • If no condition exists
    4. Ignition - On / Vehicle - In Service Mode
    5. Verify the scan tool parameter:ISS/OSS Supply Voltage=OK
      • If not the specified state - Replace the component:Q8 Control Solenoid Valve Assembly
      • If the specified state - Replace the component:B14A Transmission Output Shaft Speed Sensor
      • Go to next step: If the specified state 
  7. Perform the following procedure/test:Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test 

    Verify the procedure/test passes.

    • If the procedure/test does not pass 

      Replace the component:Q8 Control Solenoid Valve Assembly

    • Go to next step: If the procedure/test passes 
  8. Verify the condition does not exist:Automatic Transmission Input Shaft Speed Sensor Reluctor Wheel - Damaged or misaligned reluctor ring.
    • If a condition exists 

      Repair or replace as necessary.

    • If no condition exists
  9. Test or replace the component:B14C Transmission Input Shaft Speed Sensor