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Circuit/System Testing

WARNING: This page is about a different car, the 2012 Chevrolet Volt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Vehicle OFF, disconnect the harness connector at the S16 driver information center switch, vehicle in Service Mode.
  2. Verify a test lamp illuminates between the low reference circuit terminal 12 and B+.
    • If the test lamp does not illuminate 
    1. Vehicle OFF, disconnect the X1 harness connector at the K9 body control module, vehicle in Service Mode.
    2. Test for less than 1 V between the low reference circuit terminal 12 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V
    3. Test for less than 2 Ω in the low reference 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.
    • If the test lamp illuminates 
  3. Test for B+ between the B+ circuit terminal 11 and ground.
    • If less than B+ 
    1. Vehicle OFF, disconnect the X1 harness connector at the K9 body control module.
    2. Test for infinite resistance between the B+ reference circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the B+ reference 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.
    • If B+ 
  4. Verify a test lamp does not illuminate between the B+ circuit terminal 11 and ground.
    • If the test lamp illuminates 
    1. Vehicle OFF, disconnect the X1 harness connector at the K9 body control module, vehicle in Service Mode.
    2. Test for less than 1 V between the B+ circuit terminal 11 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K9 body control module.
    • If the test lamp does not illuminate 
  5. Verify the scan tool LED Backlight Dimming Command parameter is greater than 40%.
    • If 40% or less 
    1. Vehicle OFF, disconnect the X2 harness connector at the K9 body control module, vehicle in Service Mode.
    2. Test for less than 1 V between the signal circuit terminal 10 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K9 body control module.
    • If greater than 40% 
  6. Install a 3 A fused jumper wire between the signal circuit terminal 10 and the B+ circuit terminal 11.
  7. Verify the scan tool LED Backlight Dimming Command parameter is less than 30%.
    • If 30% or greater 
    1. Vehicle OFF, disconnect the X2 harness connector at the K9 body control module.
    2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. 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, replace the K9 body control module.
    • If less than 30% 
  8. Test or replace the S16 driver information center switch.
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