Garage Door Opener Malfunction
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Garage Door Opener Malfunction
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Diagnostic Fault Information
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Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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B+
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1
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1
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-
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-
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Ground
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-
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1
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-
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-
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1. Garage Door Opener Malfunction
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Circuit/System Description
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The garage door opener is a transmitter that uses frequencies in the range 288-434 MHz. It has three buttons that can be programmed for optional combinations of transmitter/receiver so as to control up to three garage door openers, security gates, lighting systems, etc. Every button relates to a unique transmitter code section and functions independently of the other buttons.
Schematic Reference
Remote Function Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Garage Door Opener Description and Operation
Electrical Information Reference
Special Tools
J 41540 Universal Home Remote Tester
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1.
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Ignition OFF, disconnect the harness connector at the garage door opener.
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2.
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Note
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For the following tests use test probe J-35616-4A (PU). Insert this into the connector from the harness side to take measurements. Probing the terminals from the front may damage them.
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Ignition OFF, test for less than 5 Ω between the ground circuit terminal 3 and ground.
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3.
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If greater than the specified range, test the ground circuit for an open/high resistance.
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4.
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Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
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5.
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If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
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6.
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Note
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This step will clear any learned transmitters from the garage door opener. This will require reprogramming by the customer to reestablish garage door opener functionality.
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Ignition ON, hold the two outer buttons on the garage door opener for 10 seconds. The LEDs will flash quickly indicating it has entered the diagnostic mode. Place the J 41540 adjacent to the garage door opener and press each button of the garage door opener one at a time. The tester should indicate when each button is pressed.
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7.
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Using the Hand Held Transmitter from J 41540 kit, program a single button on the in-car garage door opener. Verify the Programmed LED on the test tool lights with the newly programmed vehicle garage door opener. This verifies the transmitter can learn a new function.
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8.
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If the tester indicates that one or more of the buttons does not respond, replace the garage door opener.
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9.
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Instruct the customer to program the garage door opener. Refer to the vehicle owners manual. If further malfunction occurs, a possible rolling code or incompatibility with the garage door opener receiver will prevent programming.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
Control Module References
for garage door opener replacement, setup, and programming
