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Forum for Mitsubishi Delica owners and enthusiasts.

Auto locks. working?

Auto locks. working?

Post by Paule » Sun Jan 06, 2013 9:32 pm

After putting a new battery in the door lock remote, on a whim, I’ve discovered that it works! It only does the driver’s door, but its a start.

I’m wondering if anyone else has a stock (it says Mitsubishi) blue/light blue door remote. I’d like to know if there is something up with my system, in that it only works one door on purpose, or because its broken somewhere.

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Note that my auto door locks have never worked for me in the 6 months that I’ve owned my van, even with the key. (So my suspicion is broken). Where to start looking?

Re: Auto locks. working?

Post by Mr. Flibble » Mon Jan 07, 2013 7:24 am

If it only locks one door, something is wrong.

You can always get it replaced with an after market one. This gives you greater range, more key fobs and fixes the problem.

Re: Auto locks. working?

Post by Paule » Mon Jan 07, 2013 11:19 am

I figured as much. But would there be a combo of button pushing that should open more than the drivers door? (double tap, hold button?) — Something to try first.
There is a mess of wires and controllers under the driver seat that I believe is for the remote locks and I’m wondering if something has disconnected so the other doors don’t open.

Re: Auto locks. working?

Post by TardisDeli » Mon Jan 07, 2013 11:50 am

Re: Auto locks. working?

Post by Mr. Flibble » Mon Jan 07, 2013 11:56 am

Re: Auto locks. working?

Post by psilosin » Mon Jan 07, 2013 2:20 pm

Re: Auto locks. working?

Post by Mr. Flibble » Mon Jan 07, 2013 2:48 pm

Re: Auto locks. working?

Post by Paule » Mon Jan 07, 2013 11:22 pm

Awesome! A place to start! (Not having one is usually my problem. )

Jay, I think we both have ’97 L300s. Do you suppose its in the same place? And is there a way to test the relay once I’ve got it out?

Re: Auto locks. working?

Post by TardisDeli » Tue Jan 08, 2013 11:59 am

Re: Auto locks. working?

Post by thedjjack » Tue Jan 08, 2013 12:07 pm

Re: Auto locks. working?

Post by TardisDeli » Tue Jan 08, 2013 3:21 pm

Re: Auto locks. working?

Post by TardisDeli » Wed Jan 09, 2013 11:03 am

Re: Auto locks. working?

Post by Paule » Wed Jan 09, 2013 8:01 pm

I haven’t had a chance to get underneath. What does it look like?

Re: Auto locks. working?

Post by TardisDeli » Fri Jan 11, 2013 1:10 pm

Re: Auto locks. working?

Post by dr_airtime » Tue Oct 15, 2013 12:00 pm

The «Unlock» (push up I believe) button only side of the switch for locking/unlocking the trunk door on my L300 finally stopped working. «Lock» (e.g. push down) still works with no problems.

Unlock has been slowly deteriorating over the summer (I would have to press several times and at different speeds and finally it would catch) so I am hoping this is just a case that the switch might need replacing only. Just a connection problem? Because lock still works I don’t see the problem being anything other than the switch.

Not electrically inclined so would appreciate if anyone else has experienced this. Original 22 year old switch.

Here is a post I found on Delicaclub regarding an L300 Starwagon — they didn’t find any issues with wiring so maybe I just need new switch? (No answer on the Delicaclub thread)

Good Day to all! I’m having problems with my trunk door not opening with the push of the switch button i’ve check the wires and found out it’s ok after inserting the tip of a volt tester, then i tap the door actuator to the battery’s and it’s working? I wonder where the problem could be? I saw a square box under the dashboard with wires and a «door control» word on it, does it has something to do with the trunk door? Also isn’t the side door connected in anyway with the trunk meaning when you push the switch to gate unlock, it also opens the side door locks? Mine is a P35W starwagon superexceed.

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Mitsubishi Delica key fob won’t lock or unlock the doors

Mitsubishi Delica is equipped with remote keyless entry system that allows the owners to conveniently lock and unlock the vehicle with the press of a button on the key fob. There are many reasons why the remote control of your Delica may not be working which we will discuss in this article.

Mitsubishi Delica – (CEFICEFI / Wikipedia)

The most common cause of key fob not locking or unlocking the doors in Mitsubishi Delica is dead coin battery inside the key fob. But the remote control can also stop working due to worn buttons, poor battery contact, water damage, receiver module issues, signal interference, dead 12 volt battery, unpaired key requiring reprogramming, or defective electronic chip.

1. Dead coin battery inside key fob

Dead coin battery is the leading cause of key fob not locking or unlocking the doors in Delica. Usually there are signs of weakening battery before it gives up. If the remote was working previously, but the range of the remote was gradually decreasing until it ceased to function, this indicates that the battery was wearing out.

Replace the battery

If the button cell battery in the key fob of Delica is replaced incorrectly or a battery is unsuitable, it can damage the vehicle key. Only replace drained batteries with new batteries in the same voltage, size, and specification. Make sure the battery is facing in the right direction when inserting it.

Key fob not working after replacing the battery

When purchasing a new battery for the key fob of your Delica, keep in mind that the battery may be sitting on the shelf for a long time. Therefore after replacement it may not work, or may not last that long. Try purchasing the battery from a store where stock moves fast. If you still can’t get the key fob to work after verifying that the battery is healthy, your key fob issues may not be due to bad battery.

Use by date is usually mentioned on the back of the packaging.

How long does the key fob battery last?

Depending on how often you use the key fob or remote control of your Delica, the battery should last between two and four years. This is assuming the new battery you installed is healthy and its use by date is many years away.

Tip: You can try to lock/unlock your Delica with its spare key. It will rule out any other problem with the first key, for example, water damage.

2. Poor battery connection

The battery inside the key fob of Delica has metal retaining clips that hold the battery in position and completes the circuit. If the clips don’t have any tension, it can cause contact issues and the remote may not receive any power. Make sure the battery is firmly placed and does not move around when you shake the remote. Also make sure all the battery contacts are corrosion and dust free.

3. Water damage

If your Mitsubishi Delica key fob has taken a bath in the soapy water of the washing machine after you forgot to take it out of your pants pocket, water damage is very likely.

Water resistant, not waterproof

Your Delica key has rubber seals which prevents the water from getting to the electronic chip inside. A splash of water or brief exposure to light rain should be fine, but exposure to excessive amount of water like submerging the key in the pool can cause the water to penetrate the seals and damage the chip. Submerging the key in ocean water at the beach can be much more damaging to key fob electronics due to highly conductive nature of salt water.

But my key fob survived water exposure?

If your Delica key fob survived a wash cycle, or a deep bath in the ocean or pool water, it doesn’t make the key fob waterproof, it means you got lucky. Exposure to excessive water increases the risk of water damage, so you shouldn’t make this a habit.

What to do in case of water damage?

If your Delica key fob stopping working after exposure to clean tap water or rain, immediately remove the battery and clean the electronic component with paper towel and let it dry fully before putting back the battery. In case of exposure to salt water, or soapy or dirty water, it is recommended to clean the chip with isopropyl alcohol or electronic cleaner. If the key fob still doesn’t work after cleaning and drying, the chip is probably fried and you will have to buy a new key.

4. Dead 12 volt battery

The remote keyless system and the central locking system in Delica require the 12 volt battery to be in healthy state to function properly. If the 12 volt battery is dead or if the electric current has been interrupted due to corrosion on the battery terminals or the ground connection, all on-board electronics will stop working.

In this case, you will have to manually unlock the door of your Delica with physical key. Also, the electrical accessories (e.g. headlights, fan, and infotainment system) will not function or may function poorly, and the engine will not start. Check the 12v battery and its connections.

5. Signal interference

Delica remote control signal can be disrupted by objects, poor weather conditions or transmitters on the same frequency band close to the vehicle. The remote key may work when you’re near the vehicle, but may not work from a distance. In case of severe interference, the remote may not work at all.

Interference signals can be caused not only by neighboring radio masts and towers, but also by unprofessionally installed satellite systems. A large part of the radio interference is caused by defects and aging effects in electrical devices and radio systems, which lead to unwanted emissions, radiation and repercussions on power and communication networks. Your Delica key fob should start working again when you leave the area of interference.

6. Reprogramming required

In rare cases, the remote key of Delica may stop working due to pairing issues. The key can be reprogrammed with an OBDII scanner. You may also be able to program a key by following a few steps, an original key is typically required for successful pairing. The instructions should be mentioned in the owners manual. If you fail to do it yourself, you may have to visit an authorized dealer for reprogramming of the key.

7. Defective key fob

If your Delica key fob stopped working after you dropped it on the floor, you may have damaged the internal chip. Or, if your key fob just stopped working one day out of the blue, in rare cases this could indicate a faulty key fob – assuming you have tried everything to fix the issue e.g. battery replacement, reprogramming and the spare key fob works.

8. Faulty receiver module

Mitsubishi Delica has a remote keyless system receiver that receives radio frequency signals from the key fob. If none of your key fobs work, and and you can’t reprogram the keys, it is possible the receiver module has developed a fault.

You may have to perform further diagnostics to identify the faulty. The keyless entry antenna could be damaged, or the module is just not communicating with other modules on the vehicle. In these cases an OBDII scan tool can be used to verify if the commands are being transmitted and acted on by the security module.

Reset the system

If the key fob is not working due to a glitch in the keyless entry system, it may be possible to restore the functionality by resetting the keyless entry system in your Delica.

Disconnect both negative and positive terminals of the 12 volt battery.

There isn’t any button or option to reset the keyless entry system in Delica, but you can reboot all the on-board computers by disconnecting the 12 volt battery for a few minutes. Remove the cable from the negative terminal of the battery first, then from the positive terminal. With the battery disconnected, press the horn button a few times and turn on the headlights to drain out all the residual electricity from the system. After about 15 minutes, reconnect the battery in reverse order: positive cable first, then negative cable.

Use OBD2 scanner for diagnosis

Since Mitsubishi Delica is equipped with on-board diagnostics (OBD), a fault diagnosis can provide initial indications of where the malfunction is located. This method will be especially useful when diagnosing a faulty remote keyless system receiver module.

OBD2 scanners are now available in various designs. You can use a standalone diagnostic device (shown above) or get an OBD2 adapter that connects with a smartphone app via Bluetooth or WiFi.

To begin troubleshooting, you must first connect the diagnostic tool to your Delica. The OBDII connector is usually located under the dashboard. With the tool connected, turn on the ignition. Most diagnostic devices then ask for some information about the vehicle. It is important that you enter this 100% correctly, otherwise the result of the search may be inaccurate. In addition to the vehicle make, model, and engine type, you usually also have to type in the Vehicle Identification Number (VIN). Since some OBD codes are manufacturer-specific, the scanner will be able to give you more accurate information if you enter more details about your Delica.

Conclusion:

There are many reasons why your Mitsubishi Delica key fob is not locking or unlocking the doors. When looking for the reason, you should start with the most obvious cause that is easy to diagnose: dead coin battery, which you can replace in a few minutes.

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