S70D Steering Wheel Controls Switch-Right Upper Malfunction with UV6

Ignition OFF/Vehicle OFF, disconnect the harness connector at the S70D Steering Wheel Controls Switch - Right Upper. It may take up to 2 min for all vehicle systems to power down.
Test for less than 10 Ω between the ground circuit terminal 5 and ground.
- If greater than 10 Ω
1. Ignition OFF/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.
- If less than 10 Ω
Ignition ON/Vehicle in Service Mode.
Verify that a test lamp illuminates between the B+ circuit terminal 9 and ground.
- If the test lamp does not illuminate and the circuit fuse is good
1. Ignition OFF/Vehicle OFF.
2. Test for less than 2 Ω in the control circuit end to end.
  - If greater than 2 Ω, repair the open/high resistance in the circuit.
  - If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
- If the test lamp does not illuminate and the circuit fuse is open
1. Ignition OFF/Vehicle OFF.
2. Test for infinite resistance between the B+ circuit terminal 9 and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance, replace the S70D Steering Wheel Controls Switch - Right Upper.
- If the test lamp illuminates
Ignition OFF/Vehicle OFF, disconnect the harness connector at the P29 Head-Up Display, ignition ON.
Test for 2-10 V between the S70D Steering Wheel Controls Switch - Right Upper serial data circuit terminal 8 and ground.
- If less than 2 V
1. Ignition OFF/Vehicle OFF, disconnect the harness connector at the P16 Instrument Cluster.
2. Test for infinite resistance between the S70D Steering Wheel Controls Switch - Right Upper serial data circuit terminal 8 and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance
3. Test for infinite resistance between the P29 Head-Up Display serial data circuit terminal 1 and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance
4. Test for less than 2 Ω in the S70D Steering Wheel Controls Switch - Right Upper serial data circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the P16 Instrument Cluster.
- If greater than 10 V
1. Ignition OFF/Vehicle OFF, disconnect the harness connector at the P16 Instrument Cluster, ignition ON.
2. Test for less than 1 V between the S70D Steering Wheel Controls Switch - Right Upper serial data circuit terminal 8 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 1 V between the P29 Head-Up Display serial data circuit terminal 1 serial data circuit terminal 1 and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V, replace the P16 Instrument Cluster.
  - If between 2-10 V
Connect the harness connector at the S70D Steering Wheel Controls Switch - Right Upper. Ignition ON/Vehicle in Service Mode.
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/Vehicle OFF. Disconnect harness connector at the S70D Steering Wheel Controls Switch - Right Upper. Connect the harness connector at the and P29 Head-Up Display. Ignition ON/Vehicle in Service Mode.
Verify head-up display functions properly.
- If head-up display functions properly
  Replace S70D Steering Wheel Controls Switch - Right Upper.
- If head-up display does not function properly
Replace P16 Instrument Cluster.