Symptom Related Diagnostic Procedures
Garage Door Opener Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions 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.
Reference Information
Schematic Reference
Remote Function Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Connector End Views By Name
Description and Operation
Garage Door Opener Description and Operation Description and Operation
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs 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 ohm between the ground circuit terminal 3 and ground.
• If 10 ohm or greater
1. Test for less than 2 ohm in the ground circuit end to end.
• If 2 ohm or greater, repair the open/high resistance in the circuit.
• If less than 2 ohm, repair the open/high resistance in the ground connection.
• If less than 10 ohm
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 ohm in the B+ circuit end to end.
• If 2 ohm or greater, repair the open/high resistance in the circuit.
• If less than 2 ohm, 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
Note: This step will clear any learned transmitters from the S25 garage door opener. This will require reprogramming by the customer to reestablish universal home remote functionality.
6. Press and hold the two outer buttons on the S25 garage door opener for greater than 30 seconds. The LED on the S25 garage door opener will illuminate for 20 seconds, then begin to flash quickly for another 10 seconds. When the LED stops flashing, the system has been cleared and placed into default mode.
7. Place the J 41540 so that it is adjacent to the S25 garage door opener.
8. Verify the appropriate J 41540 Indicator Lights illuminate when each button on S25 garage door opener the is pressed, one at a time
• If the tester does not respond to each button press
Replace the S25 garage door opener.
• If the tester responds to each button press
9. Using the Hand Held Transmitter from the J 41540 kit, program a single button on the S25 garage door opener. Refer to the instructions provided with the J 41540 for programming instructions.
Note: When performing step 10, press the button that was programmed in step 8.
10. Verify the Programmed indicator on the J 41540 illuminates when the programmed button on the S25 garage door opener is pressed.
• If the Programmed indicator does not illuminate when the programmed button is pressed
Replace the S25 garage door opener.
• If the Programmed indicator illuminates when the programmed button is pressed
11. 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 Verification Tests after completing the repair.
Control Module References Control Module References for garage door opener replacement, programming, and setup