Circuit/System Testing

S70R Steering Wheel Controls Switch-Right without UV6

Ignition OFF, disconnect the harness connector X1 at the P16 Instrument Cluster.
Disconnect the harness connector at the S70R Steering Wheel Controls Switch - Right. Ignition ON.
Test for less than 1 V between the S70R Steering Wheel Controls Switch - Right serial data circuit terminal 5 and ground.
- If greater than 1 V
  Repair the short to voltage on the circuit.
- If less than 1 V
Ignition OFF.
Test for infinite resistance between the serial data circuit terminal 5 and ground.
- If less than infinite resistance
  Repair the short to ground on the circuit.
- If infinite resistance
Replace the S70R Steering Wheel Controls Switch - Right.

S70R Steering Wheel Controls Switch-Right with UV6

Ignition OFF, disconnect the harness connector X1 at the P16 Instrument Cluster.
Disconnect the harness connector at the S70R Steering Wheel Controls Switch - Right. Ignition ON.
Test for less than 1 V between the S70R Steering Wheel Controls Switch - Right serial data circuit terminal 5 and ground.
- If greater than 1 V
  Repair the short to voltage on the circuit.
- If less than 1 V
Ignition OFF.
Test for infinite resistance between the serial data circuit terminal 5 and ground.
- If less than infinite resistance
  Repair the short to ground on the circuit.
- If infinite resistance
Ignition OFF, disconnect the harness connector X1 at the P29 Head-Up Display.
Test for less than 1 V between the serial data circuit terminal 1 and ground.
- If greater than 1 V
  Repair the short to voltage on the circuit.
- If less than 1 V
Ignition OFF.
Test for infinite resistance between the serial data circuit terminal 1 and ground.
- If less than infinite resistance
  Repair the short to ground on the circuit.
- If infinite resistance
Connect the harness connector at the P16 Instrument Cluster and S70R Steering Wheel Controls Switch - Right. Ignition ON.
Verify steering wheel controls function properly.
- If steering wheel controls function properly
  Replace P29 Head-Up Display.
- If steering wheel controls do not function properly
Ignition OFF. Disconnect harness connector at the S70R Steering Wheel Controls Switch - Right. Connect the harness connector at the and P29 Head-Up Display. Ignition ON.
Verify head-up display functions properly.
- If head-up display functions properly
  Replace S70R Steering Wheel Controls Switch - Right.
- If head-up display does not function properly
Replace P16 Instrument Cluster.

S70L Steering Wheel Controls Switch - Left Malfunction

Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left, ignition ON.
Test for less than 1 volt between the following signal circuits and ground
- Voice - Terminal 1
- Mute - Terminal 3
- If 1 volt or greater
  Repair the short to voltage on the circuit.
- If less than 1 volt
Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S70R Steering Wheel Controls Switch - Right.
Test for infinite resistance between the following signal circuit terminals and ground.
- Voice - Terminal 1
- Mute - Terminal 3
- If less than infinite resistance
  Repair the short to ground on the circuit
- If infinite resistance
Test for less than 2 Ω on the following signal circuit terminals
- S70R Steering Wheel Control Switch - Right signal circuit terminal 1 and S70L Steering Wheel Control Switch - Left signal circuit terminal 1
- S70R Steering Wheel Control Switch - Right signal circuit terminal 3 and S70L Steering Wheel Control Switch - Left signal circuit terminal 3
- If 2 Ω or greater
  Repair the open/high resistance in the circuit.
- If less than 2 Ω
Replace the S70L Steering Wheel Controls Switch - Left.