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Circuit/System Testing

WARNING: This page is about a different car, the 2013 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the S36 instrument panel dimmer switch, ignition ON.
  2. Verify a test lamp illuminates between the low reference circuit terminal 2 and B+.
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the X1 harness connector at the K9 body control module, ignition ON.
    2. Test for less than 1 V between the low reference circuit terminal 2 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+ reference circuit terminal 1 and ground.
    • If less than B+ 
    1. Ignition 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+ reference circuit terminal 1 and ground.
    • If the test lamp illuminates 
    1. Ignition OFF, disconnect the X1 harness connector at the K9 body control module, ignition ON.
    2. Test for less than 1 V between the B+ reference circuit terminal 2 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. Park lamps ON, verify a test lamp does not illuminate between the signal circuit terminal 3 and ground.
    • If the test lamp illuminates 
    1. Ignition OFF, disconnect the X1 harness connector at the K9 body control module, ignition ON.
    2. Test for less than 1 V between the signal circuit terminal 3 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 
  6. Ignition ON, park lamps OFF, test for between 57.4 K ohms and 58 K ohms between the signal circuit terminal 3 and ground.
    • If not between 57.4 K ohms and 58 K ohms 
    1. Ignition OFF, disconnect the X1 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 between 57.4 K ohms and 58 K ohms 
  7. Test or replace the S36 instrument panel dimmer switch.
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