View Full Version : 2002 rodeo alarm system

07-30-2006, 01:38 AM
Howdy all. Got a ? for ya. Anybody know where the alarm control box is located? Doors lock and unlock but no alarm functions. Also interior lights don't come on when doors unlock. Any helpful advice would be appreciated. Also, does anyone have any info on rear differential. Mine is making a noise when coming to a stop.

08-07-2006, 01:47 PM
what do you mean the alarm doesn't come on? If you hit the door lock button on your transmitter and try to unlock the door with your key, the alarm should go off. Have you tried that?

08-07-2006, 08:23 PM
Nope. There is no alarm system activated when you lock the doors. Just have a keyless entry system.

08-07-2006, 08:50 PM
I've never seen one with keyless entry and no factory alarm. Both functions use the same box. Remove the glove box door, look to the right and you should see a black (color may vary) box mounted horizontally. That is the "anti theft and keyless entry" control.

Look at the pic by rodeovyn about half way down this post 23464&page=5

That should give you an idea of what you are looking for. The box mounted above it verticaly (red in the picture, color also varies) says 'alarm' on it but it is actually the buzzer and relay control. Has nothing to do with locks or alarm.

Now for trouble shooting try this. Open one of the windows. Use the remote to lock all the doors. Wait a minute or 2, then unlock the door with the window down using the manual lock on the door. Then open the door, the alarm should sound. The system is designed to alarm if a door is unlocked and opened by any means other then the key or remote.

Edited by: Gizmo42

08-08-2006, 03:21 AM
I have a factory alarm system. It just doesn't work. I'd like to find the box so I can see if it is repairable. The web site you gave me don't have any useful info, just someone with an alarm problem.

08-08-2006, 01:32 PM
hmm.. the link got messed up I think. Should be a pic of the box in question. Try this.. 23464&page=5

The box you want is the black on in the pic with the green plug on it.Edited by: Gizmo42

08-08-2006, 09:28 PM
OK. I found the box, I took it out but I can't see anything wrong with it. Do you know of anyway to test it? Maybe there is a way to enable it? I don't know. Any help is greatly appreciated. Are there any Isuzu mechanics oin this forum?

08-10-2006, 01:21 AM
Here's a brief description of the Anti-theft system:

The circuit consists of the starter switch, anti-theft &
keyless entry controller, anti-theft horn, front door and tailgate key switch
(detect and tamper) switch, door lock actuator for each door, engine hood
switch, clutch start switch (M/T), ANTI-THEFT indicator light and mode switch
The system operates as follows: After locking the starter
switch and removing the starter key (this sets the alarm), if the door is
unlocked in any way other than with the proper key, the headlights start
flashing, the horn sounds, and the starter circuit is disabled. (However, the
engine hood and all the doors must be locked and closed.)
Once the system has been placed in the warning or alarm
condition, it can be released only when the starter switch is shifted from "OFF"
to "ACC" by the starter key, or when the lock of the front door or the tailgate
is released (to activate the detect switch) by the starter key.
If you run the test Gizmo42 gave you will see if it operates as designed. If the park lamps flash but no horn, check your normal horn operation. I believe on your model, it had no seperate alarm horn.

If the test does not work, (no lights, no horn) you may have a bad Anti-theft, keyless entry unit. They are not (normally) repairable. If you replace it, you have to program the remotes to the new unit.

08-10-2006, 01:22 AM
Now, what kind of noise do you hear from the rear end?

08-10-2006, 12:04 PM
All the door switches work. The horn works, the lights work. The interior lights are supposed to come on when the doors are unlocked with the key fob but they don't.The system just won't arm itself. As far as the rear differential goes, I put some conditioner in it and it helped but it still occasionally slips after you've come to a full stop then come off the brakes.

08-15-2006, 02:20 AM
Been racking my brains on your anti-theft issue. You could have a bad unit, wire or diode. Kinda hard to check these things without my Fluke. Make sure the fuse in the dash fuse block (CB-20) 10A, is good. Then check the diode there as well. For the most bit, the wires don't give much problems unless they have been moved aound carelessly. You may just have a bad unit, but I'd try to make sure of all options before getting one.

Your rear end noise sounds almost like classic slip yoke in the driveshaft. Nothing safety wise to worry about, just a slip/stick situation. You can fix it though.

Remove shaft, index shaft, remove clamp, remove yoke, clean thouroughly, drill air hole in end of yoke one drill bit size larger, lube with Red Crown grease, reinstall yoke, use plastic tie strap to seal boot on yoke, reinstall shaft.

08-15-2006, 04:49 PM
most all the isuzus ive worked with.the keyless entry system is the alarm.when you lock the doors with the remote its armed.if the doors are opened any other way the horn goes one question.....when you try to arm it with the remote does the horn chirp more than once.if so the system sees an open door switch or tamper for checking the controller.there are pinout charts that isuzu has also you will need a schematic on the whole check all power points grounds an all switches.also if you lock the doors with the key an wait a few seconds until the red light starts to flash its armed...does it do this?the keyless entry controller is behind the glove box,the one thtas laying flat not the upright one.i think gizmo pointed this out to you already.i havent really notice the interior lights coming on until one of the doors are opened i never seen them come on with just disarming thte system.

/Edited by: ISUZUGURU

08-15-2006, 08:40 PM
Thank you all for your responses. When I unlock the doors with the remote, the horn does not sound. The little red light blinks when the door is opened then goes out after approx. 10 secs. All the door switches and hood and rear window switches work. If I try to arm the alarm with anything open it sets off the horn. I've had the alarm box behind the glove box out but there is really no way to test it. Nothing looks burnt or disconnected. I just think the module is bad. As for the rear differential, I don't think that the noise is coming from the drive shaft. The noise is definitely coming from the rear. Like I said, I added some conditioner and it helped. Someone told me it's the limited slip differential that's slipping when I come to a full stop then let go of the brake.

08-16-2006, 01:12 AM
I checked a 2002 Rodeo the other day, and the dome light does come on with the RKE. I never paid that close of attention before niether.

I do suspect the anti-theft/keyless entry unit as well.

08-16-2006, 12:13 PM
I'll go to Isuzu and price one out and see if it's worth replacing. What can you tell me about the drive shaft assembly. What's under the rubber boot? And where do I have to drill a hole?

08-16-2006, 08:39 PM
I would check or for a used anti theft unit. It seems rare for them to go bad and the stealership will want a fortune for one.

The rubber boot on the drive shaft covers the slip joint. The grease inside can dry out or get displaced. There is a how to at for regreasing it. The pics show an older steel drive shaft but the newer aluminum one is much the same.

08-19-2006, 09:30 PM
Thanks for the info Guys. As far as the alarm system is concerned, it may be cheaper to have an aftermarket system installed. The rear differential is definitely the noise culprit. The slip joint is solid. No deflection there. Besides, I gave it to my wife. She loves it.