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Posts
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Joined
Profile Information
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First Name
Q
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Gender
Not Telling
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Lexus Model
LS400 UCF20 - MK III
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Year of Lexus
1997
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UK/Ireland Location
Other/NonUK
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Interests
Computers & Electronics
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plexus914's Achievements
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Battery drain?
plexus914 replied to Scribe's topic in LS 400 / Lexus LS 430 / Lexus LS 460 / Lexus 600h / Lexus 500h Club
Regarding battery drain - should be under 50mA - on a 97 model its 24.8mA: Before you measure any rest current your car has to get into "sleep mode". Keep in mind that in order for the car to sleep at all it must be off and nothing can be "touched" (no opening of the trunk or doors, no pressing any buttons on the key fob etc.) If something is touched the timer starts all over again. How long it takes for it "to go to sleep" I am not quite sure, but 30 minutes should be enough and rest current should be under 0,05Amps (50mA). For comparison 20 minutes after arming the anti theft deterrent system my 1997 LS400 has a rest current of 18 - 28mA. (before 20min it is about 40-50mA). Alarm went off at about 11,82Volts. Battery should be charged when less than 12,4Volts (75%). Procedure of how I did it and got a reading of 24.8mA: - Turn ignition off and pull the key - Open engine bonnet and close its lock with a screwdriver - Close all doors - leave the battery connected and arm the anti theft deterrent system either by key or by key fob.....and check security lamp if it works - to be sure leave the car alone for about 30 - 60 minutes (I went back to the car after about one hour) - go back to the car's battery and measure rest current without interrupting the current. Before disconnecting the battery put the pair of test leads (black one/-)to the negative battery terminal and the other (red one/+/amps or mA) to the negative terminal clamp.......now disconnect carefully terminal and clamp. -
Erratic idle
plexus914 replied to shanra's topic in LS 400 / Lexus LS 430 / Lexus LS 460 / Lexus 600h / Lexus 500h Club
ECU / 89661-50350 (08.1996 - 11.1996 / 97 model year) has 9 caps.: 2 x 10μF - 50v 2 x 47μF - 63v 2 x 100μF - 10v 1 x 220μF - 16v 2 x 15μF - 35v -
Very Odd Knocking Noise
plexus914 replied to skib's topic in Lexus IS 250 / Lexus IS 250C Club / Lexus IS 220D & IS 200D Club
That sounds like glow plugs and/or injectors. Here is an interesting link to that kind of problem on a 2006 220D: -
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Looks like that is a temp sensor and light sensor in one.: 89121-50020 (03/2005 - 12/2008) http://www.japan-parts.eu/lexus/eu/2008/rx400h/mhu38r-awxgkw/3_524210_002_309W/electrical/8715_heating-air-conditioning-control-air-duct/3 http://www.japan-parts.eu/lexus/eu/2008/rx400h/mhu38r-awxgkw/3_524210_002_309W/electrical/8416_automatic-light-control-system-conlight
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Yes, that key-fob part number (89742-50640) is for the European model - see links below, but if I was you I would try to find a used one first by checking out car-breakers in the UK (via fleabay maybe?) and reprogram it to the car. I have reprogrammed a used one once. Keep in mind lots of LSs end up in East Europe https://www.toyodiy.com/parts/xref?s=89742-50640&mU=on&mE=on&mJ=on&mG=on http://www.japan-parts.eu/lexus/gr/1996/ls400/ucf20r-aepgkw/5_431220_005_/electrical/8420_wireless-door-lock#89742
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LS400 1996 and 1997 Cheapest way and decent quality is to get a key and chip from China via Aliexpress. Was about 14 bucks in 2014. The China key was cut by a local key smith and the China transponder chip was programmed by the local Lexus dealer. I was able to get the fob programmed with the "key/remove key/pat your head/rub your tummy dances" programming procedure, but not the key. (Key Fob – 433MHz - 89742-50640 (LS400 8/95 – 7/97)) (Immobilizer Box – ECU – 89780-50010 (8/95-7/97)) Master Key - TOY 40 – long blade (89785-30020 (LS400 8/95 – 7/97)) PS: Links for reference only: http://www.japan-parts.eu/lexus/gr/1996/ls400/ucf20r-aepgkw/5_431220_005_/electrical/8424_anti-theft-device#89785 Key – blank – without chip: https://www.aliexpress.com/item/1-pc-New-Replacement-transponder-key-shell-Case-fits-for-Lexus-TOY-40-key-blade-long/32641798532.html?spm=a2g0s.9042311.0.0.27424c4dPAV4nS + Transponder Chip – ID4C (Avensis Celica Yaris Corolla Lexus): https://www.aliexpress.com/item/2pcs-lot-ID4C-Transponder-Chip-for-Toyota-Avensis-Celica-Yaris-Corolla-new-chip/32810786557.html?spm=2114.search0604.3.7.3d462da4xRcAOo&ws_ab_test=searchweb0_0,searchweb201602_3_10320_10065_10068_10890_10547_319_10546_317_10548_10696_453_10084_454_10083_433_10618_431_10304_10307_10820_537_536_10902_10843_10059_10884_10887_100031_321_322_10103-10890,searchweb201603_54,ppcSwitch_0&algo_expid=959319cf-ca16-4a39-bd60-336cf691803d-1&algo_pvid=959319cf-ca16-4a39-bd60-336cf691803d&transAbTest=ae803_5
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Quatrac 5s have asymmetrical tread pattern with good traction and handling, but pretty noisy. Especially when driving with open windows. I am okay with the Quatrac 5s, I like it a little louder. This article confirms my experience. https://motorandwheels.com/are-vredestein-tires-quiet-noisy/ If you prefer the LS-quietness, do not buy them. I would love to know how the Quatrac Pro (looks like it has a quieter tread pattern) and the Michelin Cross Climate (symmetrical tread pattern) on a 95-97 LS400 perform. PS: The LS400 came with asymmetrical tread pattern.