Garage Door Opener Inoperative One LED

The garage door opener (GDO) is a transmitter operating between 288 and 399 MHz. The GDO has 3 buttons that may be programmed for individual transmitter/receiver combinations to control up to 3 GDOs, security gates, and lighting systems. Each button represents a transmitter code section of the transmitter, which operates separately from any other button, and may be considered a separate transmitter.

GDO operation is dependent on the position of the valet switch, if equipped. If the vehicle is equipped with a valet switch, verify it is not in valet mode before continuing with the diagnostics.

Schematic Reference

Remote Function Schematics

Connector End View Reference

Remote Function Connector End Views

Description and Operation

Garage Door Opener Description and Operation

Electrical Information Reference

Special Tools Required

J 41540 Homelink Tester

1. Ignition OFF, disconnect the harness connector at the GDO.
2. Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit terminal 3 and ground.

⇒	If greater than the specified value, test the ground circuit for an open/high resistance.

3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground.

⇒	If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

4. Hold the 2 outer buttons on the GDO until the LED stops flashing. Place the J 41540 adjacent to the GDO and individually press each button of the GDO. The tester should indicate when each button is pressed.

⇒	If one or more of the buttons does not respond when each button is pressed, replace the GDO.

5. Program the GDO with the customer's device. The GDO should learn the device.

⇒	If the device is not learned, a possible rolling code or incompatibility with the GDO receiver will prevent programming. Contact 1-800-355-3515.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for GDO replacement, setup, and programming

Garage Door Opener Inoperative Three LEDs

The garage door opener (GDO) is a transmitter operating between 288 and 399 MHz. The GDO has 3 buttons that may be programmed for individual transmitter/receiver combinations to control up to 3 GDOs, security gates, and lighting systems. Each button represents a transmitter code section of the transmitter, which operates separately from any other button, and may be considered a separate transmitter. Battery voltage is provided to the GDO from the PCM fuse in the underhood fuse block.

Schematic Reference

Remote Function Schematics

Connector End View Reference

Remote Function Connector End Views

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List

Special Tools Required

J 41540 Universal Home Remote Tester

Diagnostic Aids

In circuit/system testing, in step 4, the two outer buttons of the transmitter are pressed and held in order to enter the diagnostic mode so that the transmitter can be used with the GDO tester. The transmitter will complete the following during the process:

1. After 20 seconds, the LEDs will flash indicating all codes are cleared and the default settings are set.
2. After an additional 10 seconds, the LEDs will flash again indicating that the diagnostic settings are now programmed into all three buttons.

1. Ignition OFF, disconnect the harness connector at the GDO.
2. Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit terminal 3 and ground.

⇒	If greater than the specified value, test the ground circuit for an open/high resistance.

3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground.

⇒	If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

4. Ignition ON, hold the 2 outer buttons on the GDO for 30 seconds. Place the J 41540 adjacent to the GDO and press each button of the GDO one at a time. The tester should indicate when each button is pressed.

⇒	If the tester indicates that one or more of the buttons does not respond, replace the GDO.

5. Program the GDO with the customers remote. A possible rolling code or incompatibility with the GDO receiver will prevent programming. Refer to www.learcar2u.com or 1-866-572-2728.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for GDO replacement, setup, and programming