Circuit/System Testing

Ignition OFF, disconnect the harness connector at the S70R Steering Wheel Controls Switch-Right, ignition ON.
Verify a test lamp illuminates between the ignition circuit terminal 1 and ground.
- If the test lamp does not illuminate
1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
2. Test for greater than 100 Ω between the ignition circuit and ground.
  - If 100 Ω or less, repair the short to ground on the circuit.
  - If greater than 100 Ω
3. Test for less than 2 Ω in the ignition 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 K20 Engine Control Module.
- Go to next step: If the test lamp illuminates
Verify the scan tool K20 Engine Control Module Cruise Control Switch Status parameter is Off.
- If not Off
1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module, ignition ON.
2. Test for less than 1 V between the signal 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 K20 Engine Control Module.
- Go to next step: If Off
Install a 3 A fused jumper wire between the signal circuit terminal 2 and the ignition circuit terminal 1.
Verify the scan tool K20 Engine Control Module Cruise Control Switch Status parameter is Disabled.
- If not Disabled
1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
2. Test for infinite resistance between the signal circuit terminal 2 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 K20 Engine Control Module.
- Go to next step: If Disabled
Test or replace the S70R Steering Wheel Controls Switch-Right.