KEYLESS ENTRY SYSTEM PRELIMINARY INSPECTION

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• Perform the following preliminary inspection before troubleshooting.

STEP | INSPECTION | ACTION
--- | --- | ---
1 | • Is system an after-market one? | Yes | Perform troubleshooting according to after-market keyless entry system manual.
No | Go to the next step.
2 | • Did customer activate keyless entry system when ignition switch was in LOCK position? | Yes | Go to the next step.
No | • Explain to customer that system does not work when ignition is in ON position. • Turn ignition switch to LOCK position, then 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 7.
No | Go to the next step.
4 | • Visually inspect the transmitter battery for the following: (See TRANSMITTER BATTERY REPLACEMENT.) ― Battery direction (polarity) ― Battery type (CR2025) ― 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 (CR2025), then go to the next step. Battery terminal malfunction: • Clean corrosion and soiling or repair the terminal, then go to the next step.
No | Go to Step 6.
5 | • Does the keyless entry system operate properly? | Yes | Go to Step 7.
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.) • 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.)
No | Does not operate on all transmitters: • Go to Step 4 of troubleshooting NO. 3 TRANSMITTER ID CODE CANNOT BE REPROGRAMMED. Does not operate on only one: • Replace the transmitter which does not operate, then go to Step 11.
7 | • Did the customer activate the transmitter within operative area (Within 1 m {3 ft} from area around vehicle)? | Yes | Go to the next step.
| No | The system is normal. Explain to the customer that the system does not work without the system operative area.
8 | • Did customer use keyless entry system in particular area, such as being 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 the next step.
No | Go to the next step.
9 | • 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 the next step.
No | Go to the next step.
10 | • Perform on-board diagnostic function. • Does on-board diagnostic function work? | Yes | Go to the next step.
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.
11 | • Attempt to reprogram transmitter ID code. • Can transmitter ID code be reprogrammed? | Yes | System is normal now.
No | Go to Step 1 of troubleshooting NO. 3 TRANSMITTER ID CODE CANNOT BE REPROGRAMMED.