Universal Transmitter

If both the Universal Transmitter and the Electronic Vehicle Information Center (EVIC) are inoperative, (Refer to ELECTRICAL/OVERHEAD CONSOLE/ELECTRONIC VEHICLE INFO CENTER - DIAGNOSIS AND TESTING) . If the Universal Transmitter is inoperative, but the EVIC is operating normally, retrain the Transmitter with a known good transmitter (Refer to ELECTRICAL/OVERHEAD CONSOLE/UNIVERSAL TRANSMITTER - STANDARD PROCEDURE - SETTING TRANSMITTER CODES) . If the unit is still inoperative, test the universal transmitter with the Radio Frequency Detector special tool as described below. See Fig 1:

1. Turn the Radio Frequency (RF) Detector ON. A "chirp" will sound and the green power LED will light. If the green LED does not light, replace the battery.
2. Hold the RF detector within one inch of the TRAINED universal transmitter and press any of the transmitters buttons.
3. The red signal detection LEDs will light and the tool will beep if a radio signal is detected. Repeat this test three times.

Fig 1: RADIO FREQUENCY DETECTOR

Courtesy of DAIMLERCHRYSLER CORP.