Flow Chart No. 9: Illuminated Entry Request Inoperative

Flow Chart No. 9 - Symptom - Illuminated entry request inoperative.

The GEM controls the interior lights with the illuminated entry function. The RAP module sends pulses on the GEM illuminated entry circuit to request the illuminated entry begin or end. The BR/LG circuit is normally pulled up by the GEM. The RAP module pulls the voltage low with pulses of different lengths.
^ 200 milliseconds from RAP module requests illuminated entry ON.
^ 300 milliseconds from RAP module requests illuminated entry OFF.

Step 1
Check illuminated entry operation.
1. Press the UNLOCK button on a remote transmitter to unlock the doors and turn the illuminated entry on.
2. Press the LOCK button on a remote transmitter within 20 seconds of pressing UNLOCK button to lock the doors and turn the illuminated entry off.




3. Does illuminated entry work as described?

Step 2
Measure GEM illuminated entry voltages.
1. Measure the voltage on BR/LG circuit at the RAP module (keep modules connected) using signal ground (BAN) as a voltage reference. Measure voltage with NGS: DIGITAL MEASUREMENT, VOLTMETER, setting RANGE at 40 V.
2. Continue to measure voltage and press the UNLOCK button on the transmitter.




3. Was the MIN voltage captured when the pulse was transmitted less than 1.3 volts?

Step 3
Check GEM illuminated entry request circuit.
1. Check BR/LG circuit for shorts or an open between RAP module and GEM.




2. Is the wiring OK?

Step 4
Check GEM illuminated entry pulse widths.
1. Keep status from Step 2. Select NGS: DIGITAL MEASUREMENT, PULSE WIDTH METER and choose LEVEL setting LOW.
2. Press the UNLOCK button on the transmitter.




3. Was the PULSE WIDTH between 190 and 210 milliseconds?