Circuit/System Testing

Ambient Light Sensor Malfunction

1. Ignition/vehicle OFF, disconnect the connector at the B10B Sun Load Temperature and Ambient Light and Security Indicator Sensor, ignition ON.
2. Verify a test lamp illuminates between low reference terminal 6 and B+.
   • If the test lamp does not illuminate 
   1. Test circuit 407 for an open/high resistance.
      • If an open/high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open/high resistance is not found.
   2. Replace the K9 Body Control Module.
   • Go to next step: If the test lamp illuminates 
3. Test for 4.8 V - 5.2 V between signal circuit terminal 3 and ground.
   • If less than 4.8 V 
   1. Test circuit 278 for a short to ground.
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short to ground is not found.
   2. Test circuit 278 for an open/high resistance.
      • If an open/high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open/high resistance is not found.
   3. Replace the K9 Body Control Module.
   • Go to next step: If greater than 5.2 V 
   1. Test circuit 278 for a short to voltage.
      • If a short to voltage is found, repair the fault on the circuit.
      • Go to next step: If a short to voltage is not found.
   2. Replace the K9 Body Control Module.
   • Go to next step: If between 4.8 V - 5.2 V 
4. Replace the B10B Sun Load Temperature and Ambient Light and Security Indicator Sensor.

Daytime Running Lamps Malfunction

1. Ignition/vehicle OFF, exterior lamps OFF, disconnect the appropriate component:
   • E13LA Front Headlamp - Left
   • E13RA Front Headlamp - Right
2. Verify a test lamp illuminates between the appropriate ground circuit terminal and B+:
   • {With T87} E13LA Front Headlamp - Left = Terminal 1 and 5
   • {With T87} E13RA Front Headlamp - Right = Terminal 1 and 5
   • {Without T87} E13LA Front Headlamp - Left = Terminal 1 and 4
   • {Without T87} E13RA Front Headlamp - Right = Terminal 1 and 4
   • If the test lamp does not illuminate 
   1. Repair the open/high resistance on the ground circuit or ground connection.
   • Go to next step: If the test lamp illuminates 
3. Connect a test lamp between the appropriate control circuit terminal and ground, ignition ON/vehicle in service mode:
   • {With T87} E13LA Front Headlamp - Left = Terminal 7
   • {With T87} E13RA Front Headlamp - Right = Terminal 7
   • {Without T87} E13LA Front Headlamp - Left = Terminal 5
   • {Without T87} E13RA Front Headlamp - Right = Terminal 5
4. Verify the test lamp turns ON and OFF while commanding the appropriate Daytime Running Lamp ON and OFF with the scan tool.
   • If the test lamp is always OFF 
   1. Test the appropriate circuit for a short to ground:
      • E13LA Front Headlamp - Left = Circuit 7538
      • E13RA Front Headlamp - Right = Circuit 7539
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short tot ground is not found
   2. Test for the appropriate circuit for an open/high resistance:
      • E13LA Front Headlamp - Left = Circuit 7538
      • E13RA Front Headlamp - Right = Circuit 7539
      • If an open/high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open/high resistance is not found
   3. Replace the K219 Lighting Control Module.
   • If the test lamp is always ON 
   1. Test the appropriate circuit for a short to voltage:
      • E13LA Front Headlamp - Left = Circuit 7538
      • E13RA Front Headlamp - Right = Circuit 7539
      • If a short to voltage is found, repair the fault on the circuit.
      • Go to next step: If a short to voltage is not found
   2. Replace the K219 Lighting Control Module.
   • Go to next step: If the test lamp turns ON and OFF 
5. Replace the appropriate E13 Headlamp Assembly.