Circuit/System Testing

Test A

1. Ignition OFF and all vehicle systems OFF. Disconnect the connector at the appropriate position sensor:
   • DTC C103C = B11LF Front Suspension 4 Corner Leveling System Position Sensor - Left
   • DTC C103D = B152 Rear Suspension Automatic Forward Lighting Leveling Position Sensor
   • DTC C103E = B11RF Front Suspension 4 Corner Leveling System Position Sensor - Right
2. Test for less than 10 Ω between the low reference circuit terminal 2 and ground.
   • If 10 Ω or greater 
   1. Test the appropriate circuit for an open/high resistance:
      • DTC C103C = Circuit 1206
      • DTC C103D = Circuit 1209
      • DTC C103E = Circuit 1212
      • If an open/high resistance is found, repair the circuit fault.
      • Go to next step: If an open/high resistance is not found
   2. Replace the K19 Suspension Control Module.
   • Go to next step: If less than 10 Ω 
3. Ignition ON.
4. Test for 4.8 - 5.2 V between the 5 V reference circuit terminal 1 and ground.
   • If less than 4.8 V 
   1. Test the appropriate circuit for a short to ground:
      • DTC C103C = Circuit 1205
      • DTC C103D = Circuit 1208
      • DTC C103E = Circuit 1211
      • If a short to ground is found, repair the circuit fault.
      • Go to next step: If a short to ground is not found
   2. Test the appropriate circuit for an open/high resistance:
      • DTC C103C = Circuit 1205
      • DTC C103D = Circuit 1208
      • DTC C103E = Circuit 1211
      • If an open/high resistance is found, repair the circuit fault.
      • Go to next step: If an open/high resistance is not found
   3. Replace the K19 Suspension Control Module.
   • If greater than 5.2 V 
   1. Test the appropriate circuit for a short to voltage:
      • DTC C103C = Circuit 1205
      • DTC C103D = Circuit 1208
      • DTC C103E = Circuit 1211
      • If a short to voltage is found, repair the circuit fault.
      • Go to next step: If a short to voltage is not found
   2. Replace the K19 Suspension Control Module.
   • Go to next step: If between 4.8 - 5.2 V 
5. Test for less than 1 V between the signal circuit terminal 3 and ground.
   • If 1 V or greater 
   1. Test the appropriate circuit for a short to voltage:
      • DTC C103C = Circuit 1207
      • DTC C103D = Circuit 1210
      • DTC C103E = Circuit 1213
      • If a short to voltage is found, repair the circuit fault.
      • Go to next step: If a short to voltage is not found
   2. Replace the K19 Suspension Control Module.
   • Go to next step: If less than 1 V 
6. Ignition OFF. Disconnect the connector at the K19 Suspension Control Module.
7. Test for infinite resistance between signal circuit terminal 3 and ground.
   • If less than infinite resistance 

     Repair the short to ground on the circuit.

   • Go to next step: If infinite resistance 
8. Test for less than 2 Ω between signal circuit terminal 3 and the other end of the circuit.
   • If greater than 2 Ω 

     Repair the open/high resistance on the circuit.

   • Go to next step: If less than 2 Ω 
9. Test or replace the appropriate position sensor.
10. Operate vehicle under the Conditions for Running the DTC.
11. Verify DTCs C103C, C103D, or C103E do not set.
    • If any of the DTCs set 

      Replace the K19 Suspension Control Module.

    • Go to next step: If none of the DTCs set 
12. A fault is not currently present and may be an intermittent condition.