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Circuit/System Testing

NOTE:

Use the Wiring Schematics and connector end views to identify the device's ground, B+, ignition, and LIN serial data circuit terminals.

  1. Ignition/Vehicle OFF, disconnect the harness connector at the S25 Garage Door Opener Transmitter.
  2. Verify a test lamp illuminates between the ground circuit terminal 3 and B+.
    • If the test lamp does not illuminate 

      Repair the open/high resistance in the ground circuit or ground connection.

    • Go to next step: If the test lamp illuminates 
  3. Ignition ON/Vehicle In Service Mode.
  4. Verify a test lamp illuminates between the B+ circuit terminal 6 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Test for an open/high resistance in the B+ circuit.
      • If an open/high resistance is found, repair the fault in the circuit.
      • Go to next step: If an open/high resistance is not found
    2. 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. Test for a short to ground in the B+ circuit.
      • If a short to ground is found, repair the fault in the circuit.
      • Go to next step: If a short to ground is not found
    2. Replace the S25 Garage Door Opener Transmitter.
    • Go to next step: If the test lamp illuminates 
  5. Ignition/Vehicle OFF, disconnect the harness connector at the S70R Radio Control Switch - Steering Wheel.
  6. Ignition ON/Vehicle In Service Mode.
    7. NOTE:

    For accurate voltage reading, disconnect the battery charger prior to performing the following test step.

  7. Test for 3.5-12 V between the Radio LIN Bus 1 circuit terminal 6 (circuit 10652) at the S25 Garage Door Opener Transmitter and ground.
    • If less than 3.5 V 
    1. Ignition/Vehicle OFF, disconnect the X2 harness connector at the A11 Radio.
    2. Test for infinite resistance between the Radio LIN Bus 1 circuit terminal and ground.
      • If less than infinite resistance, repair the short to ground in the circuit.
      • Go to next step: If infinite resistance
    3. Test for less than 2 Ω in the Radio LIN Bus 1 circuit end to end.
      • 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 A11 Radio.
    • If greater than 12 V 
    1. Ignition/Vehicle OFF, disconnect the X2 harness connector at the A11 Radio.
    2. Ignition ON/Vehicle In Service Mode.
    3. Test for less than 1 V between the Radio LIN Bus 1 circuit terminal and ground.
      • If 1 V or greater, repair the short to voltage in the circuit.
      • Go to next step: If less than 1 V
    4. Replace the A11 Radio.
    • Go to next step: If between 3.5-12 V 
  8. Ignition/Vehicle OFF, disconnect the X2 harness connector at the A11 Radio.
  9. Reconnect the harness connector at the S25 Garage Door Opener Transmitter.
  10. Ignition ON/Vehicle In Service Mode.
  11. Test for 3.5-12 V between the Radio LIN Bus 1 circuit terminal 18 X2 at the A11 Radio and ground.
    • If less than 3.5 V or greater than 12 V 

      Replace the S25 Garage Door Opener Transmitter.

    • Go to next step: If between 3.5-12 V 
  12. Ignition/Vehicle OFF, reconnect the harness connector at the S70R Radio Control Switch - Steering Wheel.
  13. Ignition ON/Vehicle In Service Mode.
  14. Test for 3.5-12 V between the Radio LIN Bus 1 circuit terminal 18 X2 at the A11 Radio and ground.
    • If less than 3.5 V or greater than 12 V 

      Replace the S70R Radio Control Switch - Steering Wheel.

    • Go to next step: If between 3.5-12 V 
  15. Ignition/Vehicle OFF, inspect both harness and component connectors for contamination, corrosion, and terminal tension.
  16. Reconnect the harness connector at the S25 Garage Door Opener Transmitter, the S70R Radio Control Switch - Steering Wheel, and the A11 Radio. Verify the connector/terminals are fully seated.
  17. Ignition ON/Vehicle In Service Mode.
  18. Verify the S25 Garage Door Opener Transmitter is operational using the EL-52545.
    • If the S25 Garage Door Opener Transmitter is still not functional, replace the S25 Garage Door Opener Transmitter.
    • Go to next step: If the S25 Garage Door Opener is functional
  19. A fault is currently not present and may be an intermittent condition.
  20. Instruct the customer to program the Universal Remote to their opener. Refer to the vehicle owners manual. If further malfunction occurs, a possible rolling code or incompatibility with the Universal Remote will prevent programming.
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