Garage Door Opener Transmitter

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

The universal home remote is a transmitter operating between 288 and 434 MHz. The universal home remote has three buttons that may be programmed for individual transmitter/receiver combinations to control up to three garage doors, security gates, lighting systems, etc. Each button represents a unique transmitter code section, which operates independently of the other buttons, and may be considered a separate transmitter.

Diagnostic Aids

To program up to three devices:

1. Hold the end of the hand-held transmitter for the garage door opener or device being programmed about 3 to 8 cm (1 to 3 in) away from the Universal Remote system buttons with the indicator light in view..
Note: Radio signals for some gate operators follow different rules. It may be necessary to follow the instructions regarding gates at the end of the second set of three steps.

2. Press and release one of the three Universal Remote system buttons that you would like to program. Press and hold the hand-held transmitter button. Do not release the hand-held transmitter button until the indicator light changes from a slow to a rapid flashing light or a continuously on light. Then release the button.
3. Press and hold the newly programmed Universal Remote system button for five seconds while watching the indicator light and garage door activation.

• If the indicator light nstays on continuously or the garage door moves when the button is pressed, then programming is complete.
• If the indicator light does not come on or the garage door does not move, a second button press may be required. For a second time, press and hold the newly programmed button for five seconds. If the light stays on or the garage door moves, programming is complete.
• If the indicator light blinks rapidly for two seconds then changes to a solid light and the garage door does not move perform the additional 3 steps below.

1. Locate the Learn or Smart button inside the garage on the garage door receiver. The name and color of the button may vary by manufacturer.
2. Press and release the Learn or SMart button. The following step, step 3, must be completed within 30 seconds of pressing this button.
3. Inside the vehicle, press and hold the newly programmed Universal Remote system button for three seconds and then release it. IIf the garage door does not move or the lamp on the garage door receiver does not flash, press and hold the same button a second time for three seconds then release it. Again, if the door does not move or the garage door lamp does not flash , press and hold the same button a third time for three seconds then release it..

The Universal Remote system should now activate the garage door. Repeat the process for additional buttons.

Some radio-frequency laws and gate operators require transmitter signals to time out or quit after several seconds of transmission. This may not be long enough for the Universal Remote system to pick up the signal during programming.

If the programming did not work, replace Step 2 under “Programming the Universal Remote System” with the following:

Press and hold the Universal Remote system button while pressing and releasing the hand-held transmitter button every two seconds until the signal has been successfully accepted by the Universal Remote system. The Universal Remote system indicator light will flash slowly at first and then rapidly. Proceed with Step 3 under “Programming the Universal Remote System” to complete.

Reference Information

Schematic Reference

Remote Function Schematics

Connector End View Reference

Master Electrical Component List

Description and Operation

Garage Door Opener Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Special Tools

J 41540 - Universal Home Remote Tester

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the S25 Garage Door Opener.
2. Test for less than 10 Ω between the ground circuit terminal 3 and ground.


• If 10 Ω or greater
  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


3. Ignition ON.
4. Verify a test lamp illuminates between the B+ circuit terminal 1 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 S25 Garage Door Opener.




• If the test lamp illuminates


5. Verify the LED on the S25 Garage Door Opener illuminates or flashes when each button on the S25 Garage Door Opener is pressed.


• If the LED does not illuminate or flash when each button is pressed
  Replace the S25 Garage Door Opener.



• If the LED illuminates or flashes when each button is pressed


6. Instruct the customer to program the S25 Garage Door Opener to their device. Refer to the vehicle owners manual. If further malfunction occurs, a possible rolling code or incompatibility with the S25 Garage Door Opener will prevent programming.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for garage door opener replacement, programming, and setup