Keyless Entry System Pre-Inspection

Perform the following pre-inspection before troubleshooting.

KEYLESS ENTRY SYSTEM PRE-INSPECTION

STEP	INSPECTION		ACTION
1	Is system an after-market one?	Yes	Perform troubleshooting according to after-market keyless entry system manual.
1	Is system an after-market one?	No	Go to next step.
2	Did customer activate keyless entry system when ignition switch was in LOCK position?	Yes	Go to next step.
2		No	Explain to customer that system does not work when ignition is in ON position. Turn ignition switch to LOCK position, then go to next step.
3	Did customer use keyless entry system in particular area, such as near TV towers, power plants, power lines or factories?	Yes	Attempt to lock/unlock doors with transmitter in non-interference area. If system operates: Area of operation is bad. Explain effect of outside interference on transmitter to customer. If system does not operate: Go to next step.
3		No	Go to next step.
4	Are any of the following after-market electrical parts on the vehicle? Cellular phone Radio-wave equipment Remote engine starter TV, etc.	Yes	Disconnect after-market electrical part connectors and attempt to lock/unlock doors with transmitter. If system operates: After-market electrical parts are interfering with keyless entry system. If system does not operate: Go to next step.
4		No	Go to next step.
5	Perform on-board diagnostic function. (See ON-BOARD DIAGNOSTIC FUNCTION ) Does on-board diagnostic function work?	Yes	Go to Step 7.
5		No	Go to next step.
6	Did any on-board diagnostic functions work?	Yes	Go to Step 1 of troubleshooting No. 1.
6	Did any on-board diagnostic functions work?	No	Go to Step 1 of troubleshooting No. 2.
7	Attempt to reprogram transmitter ID code. Can transmitter ID code be reprogrammed?	Yes	System is normal now.
7		No	Go to Step 1 of troubleshooting No. 3.