Keyless Entry System Preliminary Inspection [Keyless Entry System]

Perform the following preliminary inspection before troubleshooting.

STEP	INSPECTION		ACTION
1	Is an after-market system installed?	Yes	Perform troubleshooting according to after-market keyless entry system manual.
1	Is an after-market system installed?	No	Go to the next step.
2	Did the customer activate the keyless entry system with the key inserted into the steering lock?	Yes	Go to the next step.
2		No	Explain to the customer that the system does not work with the key inserted into the steering lock. Go to the next step.
3	The transmitter operation indicator light (LED) illuminates when any operation using the transmitter is performed.	Yes	Go to Step 8.
3		No	Go to the next step.
4	Visually inspect the transmitter battery for the following: (See TRANSMITTER BATTERY REPLACEMENT [WITH KEYLESS ENTRY SYSTEM] ). Battery direction (polarity) Battery type (CR1620) Corrosion, soiling, deformation of battery terminals (plus/minus terminals) Contact malfunction between the battery terminal and battery when battery is inserted Is there any malfunction?	Yes	Battery insertion direction, battery type problem: Properly install the battery or replace the battery with a specified one (CR1620), then go to the next step. Battery terminal malfunction: Clean corrosion and soiling or repair the terminal, then go to the next step.
4		No	Go to Step 8.
5	Does the keyless entry system operate properly?	Yes	Go to Step 9.
5	Does the keyless entry system operate properly?	No	Go to the next step.
6	NOTE: Use a new monitor battery (normal battery) or one from another vehicle which operates normally. Replace the battery in all the transmitters with a monitor-use battery (normal battery). (See TRANSMITTER BATTERY REPLACEMENT [WITH KEYLESS ENTRY SYSTEM] ). For each transmitter, verify that the transmitter operation indicator light (LED) illuminates when a button is operated. Does operation indicator light (LED) for each transmitter operate?	Yes	Go to the next step.
6		No	If the operation indicator light (LED) does not illuminate, replace the transmitter, then go to Step 11.
7	NOTE: Inspect for all transmitters. Inspect while the batteries for all of the transmitters are replaced with monitor-use batteries (normal battery). Verify the operation of keyless entry system using all of the transmitters. Does the keyless entry system operate normally?	Yes	Replace the battery, then go to Step 11. (See TRANSMITTER BATTERY REPLACEMENT [WITH KEYLESS ENTRY SYSTEM] ).
7		No	Go to the next step.
8	Did the customer activate the transmitter within operative area (Within 2.5 m {8.2 ft} from area around vehicle)?	Yes	Go to the next step.
8		No	The system is normal. Explain to the customer that the system does not work without the system operative area.
9	Did the customer use the keyless entry system in particular area, such as being near TV towers, power plants, power tines, or factories?	Yes	Attempt to lock/unlock the doors with the transmitter in a non-interference area. If system operates: Area of operation is suspect Explain effect of outside interference on the transmitter to the customer. If system does not operate: Go to the next step.
9		No	Go to the next step.
10	Are any of the following after-market electrical parts on the vehicle? Cellular phone Radio-wave equipment Remote engine starter TV, etc.	Yes	Disconnect the after-market electrical part connectors and attempt to lock/unlock the doors with the transmitter. If system operates: The after-market electrical parts are interfering with the keyless entry system. If system does not operate: Go to the next step.
10		No	Go to the next step.
11	Perform the on-board diagnostic function. (See KEYLESS ENTRY SYSTEM ON-BOARD DIAGNOSIS [KEYLESS ENTRY SYSTEM] ). Does the on-board diagnostic function work?	Yes	Go to the next step.
11		No	Go to Step 1 of NO. 1 ONE OR MORE ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE. Go to Step 1 of NO. 2 ALL ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE.
12	Attempt to reprogram the transmitter ID code. Can the transmitter ID code be reprogrammed?	Yes	The system is normal.
12		No	Go to Step 1 of troubleshooting NO. 3 TRANSMITTER ID CODE CANNOT BE REPROGRAMMED.