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Keyless Entry System Inoperative

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2000 GMC Yukon XL, 2000 GMC Yukon, 2000 GMC Sierra, 2000 Chevrolet Tahoe, and 2000 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
  1. If diagnostic system check was performed, go to next step. If diagnostic system check was not performed, see DIAGNOSTIC SYSTEM CHECK  under DIAGNOSTIC TESTS.
  2. Close all vehicle doors. Press LOCK and UNLOCK buttons on both front door lock switches. If all doors lock and unlock with door switches, go to next step. If all doors do not lock and unlock with door switches, see appropriate POWER DOOR LOCKS article.
    3. NOTE: Inspect keyless entry transmitter to ensure it is correct model for this vehicle. A wrong model transmitter may pass this test, but will not activate vehicle remote system.
  3. Turn on Keyless Entry Tester (J43241). Place transmitter on keyless entry tester pad. Press each button of transmitter one at a time. If a tone does not sound or the Green light does not illuminate after each button is pressed, go to next step. If a tone sounds and the Green light illuminates after each button is pressed, go to step  8 .
  4. If none of the buttons sound tone or illuminate the Green light, go to next step. If any button sounds tone and illuminates Green light, go to step  7 .
  5. Replace battery in transmitter, and then go to next step.
  6. Turn on Keyless Entry Tester (J43241). Place transmitter on keyless entry tester pad. Press each button of transmitter one at a time. If a tone does not sound or the Green light does not illuminate after each button is pressed, go to next step. If a tone sounds and the Green light illuminates after each button is pressed, go to step  8 .
  7. Replace transmitter, and then go to step  11 .
  8. Press PANIC (horn symbol) button on transmitter. If panic function operates normally, go to next step. If panic function does not operate normally, go to step  11 .
  9. Perform synchronization procedure. See TRANSMITTER SYNCHRONIZATION  under PROGRAMMING. If door locks cycle, go to next step. If door locks do not cycle, go to step  11 .
  10. Operate transmitter within range of vehicle. If all transmitter functions do not operate normally, go to next step. If all transmitter functions operate normally, go to step  24 .
  11. Reprogram all transmitters. See TRANSMITTER PROGRAMMING  under PROGRAMMING. If door locks do not cycle, go to next step. If door locks cycle, go to step  24 .
  12. Turn ignition off. Disconnect Remote Control Door Lock Receiver (RCDLR). Connect test light between RCDLR connector terminal No. 1 (Orange wire) and ground. See Fig 1 . If test light is on, go to next step. If test light is off, go to step  22 .
  13. Connect test light between RCDLR connector terminal No. 4 and battery voltage. See Fig 1 . If test light is on, go to next step. If test light is off, go to step  23 .
  14. Turn ignition on, engine off. Using DVOM, measure voltage between RCDLR connector terminals No. 2 (Orange wire) and 4 (Black wire). See Fig 1 . If battery voltage is present, go to next step. If battery voltage is not present, go to step  17 .
  15. Turn ignition on, engine off. Connect test light between RCDLR connector terminals No. 2 (Orange wire) and 4 (Black wire). See Fig 1 . If test light is on, go to next step. If test light is off, go to step  18 .
  16. Check Orange wire between RCDLR and Body Control Module (BCM) for short to power. If problem was found, repair as necessary, and then go to step  24 . If problem was not found, go to step  19 .
  17. Check Orange wire between RCDLR and BCM for short to ground, open or high resistance. If problem was found, repair as necessary, and then go to step  24 . If problem was not found, go to step  19 .
  18. Check RCDLR connector for poor connections. If problem was found, repair as necessary, and then go to step  24 . If problem was not found, go to step  20 .
  19. Check BCM connectors for poor connections. If problem was found, repair as necessary, and then go to step  21 .
  20. Replace RCDLR. See REMOTE CONTROL DOOR LOCK RECEIVER  under REMOVAL & INSTALLATION. Program transmitters. See TRANSMITTER PROGRAMMING  under PROGRAMMING. Go to step  24 .
  21. Replace BCM. See appropriate BODY CONTROL MODULES article. Go to step  24 .
  22. Repair open, high resistance or short to ground in Orange wire between RCDLR and TBC fuse in engine wiring harness junction block. Go to step  24 .
  23. Repair open or high resistance in Black wire between RCDLR and ground G203. Go to next step.
  24. Operate system to verify repair.
Fig 1: Remote Control Door Lock Receiver Connector Terminal Identification
G00013376Courtesy of GENERAL MOTORS CORP.
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