Circuit/System Testing

Test 1

1. Ignition/Vehicle & All vehicle systems - Off
2. Disconnect the electrical connector: S126 Drive Mode Select Switch
3. Verify a test lamp turns On between the test points: Ground circuit terminal 10 & B+
   • If the test lamp does not turn On 
   1. Test for less than 2 ohms between the test points: Ground circuit terminal 10 @ Component harness & Ground terminal
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
   • Go to next step: If the test lamp turns On 
4. Ignition - On / Vehicle - In Service Mode
5. Test for greater than 11 V between the test points: Signal circuit terminal 13 & Ground
   • If 11 V or less 
   1. Ignition/Vehicle - Off
   2. Disconnect the electrical connector: X2 @ K124 Active Safety Control Module
   3. Test for infinite resistance between the test points: Signal circuit terminal 13 @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
   4. Test for less than 2 ohms between the test points: Signal circuit terminal 13 @ Component harness & Signal circuit terminal 16 @ Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K124 Active Safety Control Module
   • If greater than 11 V 
6. Ignition/Vehicle & All vehicle systems - Off
7. Connect the electrical connector: S126 Drive Mode Select Switch
8. Ignition - On / Vehicle - In Service Mode
9. Verify the scan tool parameter: Lane Keep Assist Switch Status = Inactive
   • If not the specified state 

     Test or replace the component: c

   • Go to next step: If the specified state 
10. Operate the component: Lane Keep Assist Switch - Press and hold the switch

    Verify the scan tool parameter: Lane Keep Assist Switch Status = Active

    • If not the specified state 
    1. Ignition/Vehicle & All vehicle systems - Off
    2. Disconnect the electrical connector: X2 @ K124 Active Safety Control Module & S26 Hazard Warning Switch
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 13 @ Component harness & Ground
       • If 1 V or greater - Repair the short to voltage on the circuit.
       • Go to next step: If 1 V or less
    5. Test or replace the component: S126 Drive Mode Select Switch
    • Go to next step: If the specified state 
11. All OK.

Test 2

1. Ignition/Vehicle & All vehicle systems - Off
2. Disconnect the electrical connector: S126 Drive Mode Select Switch
3. Ignition/Vehicle - On
4. Test for greater than 3 V between the test points: Control circuit terminal 8 & Ground
   • If 3 V or less 

     Refer to: Interior Backlighting Malfunction

   • Go to next step: If greater than 3 V 
5. Ignition/Vehicle & All vehicle systems - Off
6. Connect the electrical connector: S126 Drive Mode Select Switch
7. Disconnect the electrical connector: X1 @ K124 Active Safety Control Module
8. Ignition/Vehicle - On
9. Verify the component is not activated: Lane Keep Assist Switch Indicator
   • If the component activates 
   1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
   2. Disconnect the electrical connector: S126 Drive Mode Select Switch
   3. Test for infinite resistance between the test points: Control circuit terminal 1 @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: S126 Drive Mode Select Switch
   • Go to next step: If the component does not activate 
10. Connect a 3 A fused jumper wire between the test points: Control circuit terminal 3 & Ground
11. Verify the component activates: Lane Keep Assist Switch Indicator
    • If the component does not activate 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector: S126 Drive Mode Select Switch
    3. Ignition/Vehicle - On
    4. Test for less than 1 V between the test points: Control circuit terminal 1 @ Component harness & Ground
       • If 1 V or greater - Repair the short to voltage on the circuit.
       • Go to next step: If less than 1 V
    5. Test for less than 2 ohms between the test points: Control circuit terminal 1 @ Component harness & Control circuit terminal 3 @ Control module harness
       • If 2 ohms or greater - Repair the open/high resistance in the circuit.
       • If less than 2 ohms - Replace the component: S126 Drive Mode Select Switch
    • Go to next step: If the component activates 
12. Test or replace the component: K124 Active Safety Control Module