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Home >> Chevrolet >> 2009 >> TrailBlazer 4.2 S, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Memory Modules >> Adjustable Pedal System >> Diagnostic Information and Procedures >> DTC B3607 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the adjustable pedal relay.
  2. Test for less than 10 ohms between the ground circuit terminal D and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Verify a test lamp illuminates between the B+ circuit terminal C and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or open/high resistance. If the circuit tests normal and the circuit fuse is open, test the adjustable pedal motor control circuits for a short to ground. If the circuit tests normal, replace the adjustable pedal assembly.
  4. Disconnect the harness connector at the adjustable pedal switch.
  5. Connect a test lamp between terminal A and ground of the adjustable pedals relay connector.
  6. Command the Adjustable Pedals Forward/Rearward Control with a scan tool. The test lamp should turn ON when commanding the forward control.
    • If the test lamp remains ON, test the adjustable pedals relay forward control circuit for a short to voltage. If the circuit tests normal, replace the MSM.
    • If the test lamp remains OFF, test the adjustable pedals relay forward control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.
  7. Connect a test lamp between terminal F and ground of the adjustable pedals relay connector.
  8. Command the Adjustable Pedals Forward/Rearward Control with a scan tool. The test lamp should turn ON when commanding the rearward control.
    • If the test lamp remains ON, test the adjustable pedals relay rearward control circuit for a short to voltage. If the circuit tests normal, replace the MSM.
    • If the test lamp remains OFF, test the adjustable pedals relay rearward control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.
  9. Connect the adjustable pedal switch.
  10. Verify a test lamp does not illuminate between the relay control circuit terminals listed below and ground:
    • Terminal A
    • Terminal F
    • If the test lamp illuminates, replace the adjustable pedals switch.
  11. If all circuits test normal, test or replace the adjustable pedal relay.
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