Circuit/System Testing

Test 1

1. Ignition - On / Vehicle - In Service Mode
2. Disconnect the electrical connector: X2 @ K124 Active Safety Control Module
3. Test for less than 2 Ω between the test points: Serial Data circuit terminal 7 @ K124 Active Safety Control Module & Serial Data circuit terminal 1 @ X84 Data Link Connector
   • If 2 Ω or greater 

     Repair the open/high resistance in the circuit.

   • Go to next step: If less than 2 Ω 
4. Replace the component: K124 Active Safety Control Module

Test 2

1. Ignition - On / Vehicle - In Service Mode
2. Disconnect the electrical connector: X3 @ K9 Body Control Module
3. Test for less than 1 V between the test points:
   • Ignition circuit terminal 4 & Ground
   • Signal circuit terminal 16 & Ground
   • If 1 V or greater 

     Repair the short to voltage on the circuit.

   • Go to next step: If less than 1 V 
4. Ignition/Vehicle & All vehicle systems - Off
5. Test for infinite resistance between the test points:
   • Ignition circuit terminal 4 & Ground
   • Signal circuit terminal 16 & Ground
   • If less than infinite resistance 

     Repair the short to ground on the circuit.

   • Go to next step: If infinite resistance 
6. Operate the component: Adaptive Cruise Control Gap Switch - Press and hold the switch

   Test for 2.0 k to 3.0 Ω between the test points: Ignition circuit terminal 4 & Signal circuit terminal 16

   • If not between 2.0 k and 3.0 kΩ 
   1. Disconnect the electrical connector: S70C Steering Wheel Controls Switch - Left Upper
   2. Test for less than 2 Ω between the test points: Ignition circuit terminal 4 @ K9 Body Control Module & Ignition circuit terminal 8 @ S70L Steering Wheel Controls Switch - Left
      • If 2 Ω or greater - Repair the open/high resistance in the circuit.
      • Go to next step: If less than 2 Ω
   3. Test for less than 2 Ω between the test points: Signal circuit terminal 16 @ K9 Body Control Module & Signal circuit terminal 9 @ S70L Steering Wheel Controls Switch - Left
      • If 2 Ω or greater - Repair the open/high resistance in the circuit.
      • Go to next step: If less than 2 Ω
   4. Replace the component: S70L Steering Wheel Controls Switch - Left
   • Go to next step: If between 3.5 k and 3.8 Ω 
7. Test for 6.6 k to 7.6 Ω between the test points: Ignition circuit terminal 4 & Signal circuit terminal 16
   • If not between 6.6 k and 7.6 Ω 

     Replace the component: S70L Steering Wheel Controls Switch - Left

   • Go to next step: If between 6.6 k and 7.6 Ω 
8. Replace the component: K9 Body Control Module