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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 41 (Wiring Systems And Power Management - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC B097B >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF/Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the S38 Ignition Mode Switch. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 Ω between the ground circuit terminal 4 and ground.
    • If 10 Ω or greater 
    1. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 Ω 
  3. Test for less than 10 Ω between the low reference circuit terminal 7 and ground.
    • If 10 Ω or greater 
    1. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K84 Keyless Entry Control Module.
    • Go to next step: If less than 10 Ω 
  4. Connect the S38 Ignition Mode Switch, ignition ON/Vehicle in Service Mode.
  5. Disconnect the S38 Ignition Mode Switch.
  6. Verify the scan tool K9 Body Control Module Push Button Ignition Switch Voltage parameter is greater than 11 V.
    • If 11 V or less 
    1. Connect the S38 Ignition Mode Switch.
    2. Ignition OFF/Vehicle OFF, disconnect the X2 harness connector at the K9 Body Control Module and S38 Ignition Mode Switch.
    3. Test for infinite resistance between the signal circuit terminal 6 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K9 Body Control Module.
    • Go to next step: If greater than 11 V 
  7. Install a 3 A fused jumper wire between the signal circuit terminal 6 and ground.
  8. Verify the scan tool K9 Body Control Module Push Button Ignition Switch Voltage parameter is less than 1 V.
    • If 1 V or greater 
    1. Disconnect the harness connector at the K9 Body Control Module.
    2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    3. Test for less than 2 Ω in signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K9 Body Control Module.
    • Go to next step: If less than 1 V 
  9. Connect the harness connector at the S38 Ignition Mode Switch.
  10. Verify the scan tool K9 Body Control Module Push Button Ignition Switch Voltage parameter is 8 - 10 V, with the S38 Ignition Mode Switch released.
    • If not between 8 - 10 V 

      Test or replace the S38 Ignition Mode Switch.

    • Go to next step: If between 8 - 10 V 
  11. Verify the scan tool K9 Body Control Module Push Button Ignition Switch Voltage parameter is 4 - 7 V, with the S38 Ignition Mode Switch pressed.
    • If not between 4 - 7 V 

      Test or replace the S38 Ignition Mode Switch.

    • Go to next step: If between 4 - 7 V 
  12. Disconnect the X1 harness connector at the K84 Keyless Entry Control Module.
  13. Test for infinite resistance between the S38 Ignition Mode Switch signal circuit terminal 3 and ground.
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • Go to next step: If infinite resistance 
  14. Ignition ON/Vehicle in Service Mode.
  15. Test for less than 1 V between the S38 Ignition Mode Switch signal circuit terminal 3 and ground.
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  16. Test for 4.5 - 5.5 k Ω between the S38 Ignition Mode Switch signal circuit terminal 3 and the S38 Ignition Mode Switch low reference circuit terminal 7, with the S38 Ignition Mode Switch released.
    • If not between 4.5 - 5.5 kΩ 
    1. Ignition OFF/Vehicle OFF, disconnect the harness connector at the S38 Ignition Mode Switch.
    2. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, test or replace the S38 Ignition Mode Switch.
    • Go to next step: If between 4.5 - 5.5 kΩ 
  17. Test for 1 - 1.5 kΩ between the S38 Ignition Mode Switch signal circuit terminal 3 and the S38 Ignition Mode Switch low reference circuit terminal 7, with the S38 Ignition Mode Switch pressed.
    • If not between 1 - 1.5 kΩ 

      Test or replace the S38 Ignition Mode Switch.

    • Go to next step: If between 1 - 1.5 kΩ 
  18. Replace the K84 Keyless Entry Control Module.
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