Test G: Illuminated Entry Does Not Operate Using Remote Transmitter
- Turn ignition off. Connect New Generation Star (NGS) tester following manufacturers instructions. Using NGS tester, select GEM/CTM PID IGN_GEM. Turn ignition switch through all positions. If PID values agree with switch positions, go to next step. If PID values do not agree with switch positions, repair appropriate ignition switch circuit. See POWER DISTRIBUTION article in WIRING DIAGRAMS. Clear DTCs. Retest system.
- Turn ignition off. Connect NGS tester to power supply only. DO NOT connect NGS tester to DLC. Disconnect 16-pin GEM connector C281. Measure voltage between ground and 16-pin GEM connector C281 terminal No. 9 (Brown/Light Green wire) while pressing UNLOCK button on remote transmitter. See Fig 1. If MIN voltage is less than 1.3 volts when pulse was transmitted, leave meter connected and go to next step. If MIN voltage is more than 1.3 volts when pulse was transmitted, clear MIN voltage and repeat this step to confirm high voltage. If high voltage is still present, replace RAP module. Recheck system operation.
- With meter still connected from previous step, measure illuminated entry pulse widths while pressing UNLOCK button on remote transmitter. If pulse widths are between 190 and 210 milliseconds, go to next step. If pulse widths are not between 190 and 210 milliseconds, replace RAP module. Recheck system operation.
- Disconnect RAP module 22-pin connector C338. Measure resistance of Brown/Light Green wire between 16-pin GEM connector C281 terminal No. 9 and RAP module 22-pin connector C338 terminal No. 10. Measure resistance between ground and 16-pin GEM connector C281 terminal No. 9 (Brown/Light Green wire). See Figure and Fig 1
. If resistance is less than 5 ohms between GEM and RAP module connectors, and more than 10 k/ohms between ground and GEM connector, replace GEM. Clear DTCs and retest system. If resistance is more than 5 ohms between GEM and RAP module connectors, or less than 10 k/ohms between ground and GEM connector, repair open or short to ground in Brown/Light Green wire. Recheck system operation.
Courtesy of FORD MOTOR CO.