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Home >> Chevrolet >> 2017 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Automatic Transmission - 6T45 (MH7) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P182E or P1915 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - 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: B15 Transmission Internal Mode Switch
  5. Ignition - On / Vehicle - In Service Mode
  6. Verify the scan tool parameter:Internal Mode Switch A/B/C/P@Transmission Control Module = High High High High High
    • If not the specified state 

      Replace the component: Q8 Control Solenoid Valve Assembly

    • Go to next step: If the specified state 
  7. Verify the scan tool parameter: Park/Neutral Position Switch@Engine Control Module = In Gear
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the appropriate electrical connector: Engine Control Module
    3. Test for infinite resistance between the test points: Signal terminal A@Q8 Control Solenoid Valve Assembly & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: K20 Engine Control Module
    • Go to next step: If the specified state 
  8. Connect a 3 A fused jumper wire between each of the following circuit pairs, one at a time:
    • Signal terminal B & Low Reference terminal F@Q8 Control Solenoid Valve Assembly
    • Signal terminal C & Low Reference terminal F@Q8 Control Solenoid Valve Assembly
    • Signal terminal D & Low Reference terminal F@Q8 Control Solenoid Valve Assembly
    • Signal terminal E & Low Reference terminal F@Q8 Control Solenoid Valve Assembly

      Verify the scan tool parameter: Internal Mode Switch A/B/C/P = 3 High and 1 Low

    • If not the specified state 

      Replace the component: Q8 Control Solenoid Valve Assembly

    • Go to next step: If the specified state 
  9. Connect a 3 A fused jumper wire between the test points: Signal terminal A & Low Reference terminal F@Q8 Control Solenoid Valve Assembly

    Verify the scan tool parameter: Park/Neutral Position Switch = Park/Neutral

    • If not the specified state 
    1. Remove - Jumper Wire
    2. Test for less than 1 V between the test points: Signal terminal A@Q8 Control Solenoid Valve Assembly & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    3. Ignition/Vehicle - Off
    4. Disconnect the appropriate electrical connector: Engine Control Module
    5. Test for less than 10 ohms between the test points: Signal terminal A@Q8 Control Solenoid Valve Assembly & The other end of the circuit
      • If 10 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 10 ohms - Replace the component: K20 Engine Control Module
    • Go to next step: If the specified state 
  10. Test or replace the component: B15 Transmission Internal Mode Switch
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