Circuit/System Testing
- Ignition OFF and all vehicle systems OFF. It may take up to 2 min for all vehicle systems to power down.
- Disconnect the harness connector at the S70R Radio Control Switch - Steering Wheel.
- Test for less than 10 Ω between the ground circuit terminal 8 and ground.
- Ignition/vehicle OFF.
- Test for less than 2 Ω in the ground circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, repair the open/high resistance in the ground connection.
- Go to next step: If less than 10 Ω
- Ignition ON/vehicle in service mode.
- Verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
- If the test lamp does not illuminate and the circuit fuse is good
- Ignition/vehicle OFF, remove the test lamp.
- Test for less than 2 Ω in the B+ circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, verify the fuse is OK and there is voltage at the fuse.
- If the test lamp does not illuminate and the circuit fuse is open
- Ignition/vehicle OFF, remove the test lamp.
- Test for infinite resistance between the B+ circuit and ground.
- If less than infinite resistance, repair the short to ground on the circuit.
- If infinite resistance, replace the S70R Radio Control Switch - Steering Wheel.
- Go to next step: If the test lamp illuminates
- Ignition/vehicle OFF.
- Replace the S70R Radio Control Switch - Steering Wheel.
- Operate the vehicle within the conditions for running the DTC. Verify the DTC does not reset.
- If the DTC resets, replace the P16 Instrument Panel Cluster Control Module.
- Go to next step: If the DTC does not reset
- All OK.