Circuit/System Testing

WARNING: This page is about a different car, the 2015 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.

Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S70R Steering Wheel Controls Switch - Right, ignition ON.
Test for B+ between the 12V reference circuit terminal 1 and ground.
- If less than B+
1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the 12 V 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 12 V 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+
Test for B+ between the 12 V reference circuit terminal 1 and signal circuit terminal 2.
- If less than B+
1. Ignition OFF, 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.
  - If less than 1 V
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 B+
Ignition OFF, disconnect the X3 harness connector at the K9 Body Control Module.
Test for infinite resistance between the S70R Steering Wheel Controls Switch - Right signal circuit terminal 2 and ground.
- If less than infinite resistance
  Repair the short to ground on the circuit.
- If infinite resistance
Test or replace the S70R Steering Wheel Controls Switch - Right.