LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Memory Modules >> Secondary And Configurable Customer Control System >> Diagnostic Information and Procedures >> Steering Wheel Controls Malfunction >> Circuit/System Testing >> S70D Steering Wheel Controls Switch - Right Upper Malfunction without UV6
April 5, 2026: LEMON Manuals is launched! Read the announcement.

S70D Steering Wheel Controls Switch - Right Upper Malfunction without UV6

  1. 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.
  2. Test for less than 10 Ω between the ground circuit terminal 5 and ground.
    • If greater than 10 Ω 
    1. Ignition OFF/Vehicle OFF.
    2. 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 
  3. Ignition ON/Vehicle in Service Mode.
  4. 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 
  5. Test for 2-10 V between the 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 serial data 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 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 serial data circuit 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 
  6. Test or replace S70D Steering Wheel Controls Switch - Right Upper
scientia non olet · About LEMON Manuals