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Circuit/System Testing

NOTE:

You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

Frontview Camera Module Malfunction

  1. Ignition ON.
  2. Verify no DTCs are set.
    • If no DTCs are set 
  3. Ignition OFF and all vehicle systems OFF. It may take up to 2 min for all vehicle systems to power down. Disconnect the harness connector at the K109 Frontview Camera Module.
  4. Test for less than 10 Ω between the ground circuit terminal 1 and ground.
    • If 10 Ω or greater 
    1. Ignition 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 
  5. Verify a test lamp illuminates between the B+ circuit terminal 3 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the B+ circuit end to end.
      • If 2 Ω or greater, 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.
    2. Test for infinite resistance between the B+ circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K109 Frontview Camera Module.
    • If the test lamp illuminates 
  6. Ignition ON.
  7. Test for less than 1 V between the signal circuit terminal 10 and ground.
    • If 1 V or greater 
    1. Disconnect the harness connector at S70L Steering Wheel Controls Switch - Left.
    2. Test for less than 1V between the signal circuit terminal 10 and ground.
      • If 1V or greater, repair the short to voltage on the signal circuit.
    • If less than 1 V  
  8. Ignition OFF.
  9. Test for infinite resistance between the signal circuit terminal 10 and ground with the forward collision alert switch not pressed.
    • If less than infinite resistance 
    1. Disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left.
    2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance test or replace the S70L Steering Wheel Controls Switch - Left.
    • If infinite resistance 
  10. Test for 1.2k-1.4k Ω between the signal circuit terminal 10 and ground with the forward collision alert switch pressed.
    • If not between 1.2k-1.4k Ω 
    1. Disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left
    2. Test for less than 2 Ω in the signal circuit from end to end.
      • If greater than 2 Ω

        Repair the open/high resistance in the circuit.

      • If 2 Ω or less
    3. Test or replace the S70L Steering Wheel Controls Switch - Left.
    • If between 1.2k-1.4k Ω 
  11. Connect the harness connector of the S70L Steering Wheel Controls Switch - Left and K109 Frontview Camera Module.
  12. Verify the scan tool Forward Collision Alert Function Status parameter is Off, Disabled, Not Ready To Assist or Ready To Assist.
    • If parameter is Malfunction 

      Replace K109 Frontview Camera Module.

    • If parameter is not Malfunction 
  13. All OK.

Forward Collision Alert Switch Malfunction

  1. Ignition OFF and all vehicle systems OFF. It may take up to 2 min for all vehicle systems to power down. Disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left.
  2. Test for less than 5 Ω between the ground circuit terminal 7 and ground.
    • If 5 Ω or greater 
    1. Ignition 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 5 Ω 
  3. Ignition ON.
  4. Verify the scan tool Lane Departure Warning Switch Status parameter is Open.
    • If not Open 
    1. Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module.
    2. Test for infinite resistance between the signal circuit terminal 2 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K109 Frontview Camera Module.
      • If Open 
  5. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the ground circuit terminal 7.
  6. Verify DTC B356A 02 sets.
    • If DTC does not set 
    1. Ignition OFF, remove the jumper wire, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON.
    2. Test for less than 1 V between the signal circuit 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 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K109 Frontview Camera Module.
    • If DTC sets 
  7. Test or replace the S70L Steering Wheel Controls Switch - Left.
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