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Showing Visitor Messages 1 to 8 of 8
  1. tyncobb
    08-17-15 06:17 PM
    tyncobb
    Yamae,I apologize for this PM without knowing you or introducing myself prior to this question. Yet upon reading your informative posts concerning the ECU, I thought that you may be the only member familiar with my ECU code of 35 and how that has affected my 94 Lexus LS400 which I believe had gone into the fail safe mode and I cannot start it at all. I found in a Lextreme post, ..." the HAC code is called a High Altitude Compensator sensor to detect atmospheric (absolute) pressure "If the ecu records diagnostic code 35 it goes to fail safe & the atmospheric pressure is set at 760mm Hg. This HAC sensor is built into the ecu". Thanks for any information you can tell me about this code, sensor signal, & if it is a CPU capacitor issue or if it may be another sensor that needs to be replaced as opposed to the ECU.

    I also have a Code 47 which is the sub-throttle position sensor signal & I was going to purchase a new one of these if necessary Best Regards, Tyndale Cobb
  2. JJDAG
    08-16-15 12:50 PM
    JJDAG
    Hey Yamae I just want to send a thanks for sharing your knowledge of the LS400. Reading your posts have been a great help to me, today I followed your instruction on cleaning the throttle body and air mix ports, that worked wonders. Thank you!
    John
  3. DeZyn243
    04-12-15 08:58 PM
    DeZyn243
    Yamae,
    I have my fuel pressure tester connected and I jumper wired Fp at the DLC and I got nothing at the fuel pump. No sound and no pressure applied to the fuel pressure tester gauge.
    Can u let me know how u say i can test the pressure w/o the car running.
    TY.
  4. DeZyn243
    04-11-15 02:19 PM
    DeZyn243
    Hey how's it going?
    I have a thread started in regards to bad ECU's for a 92 LS400 and a few people have told me that u wuld be the one to answer my questions.
    So, sensei!
    Can u please offer me some assistance?
    The link to my thread is below.
    But just for a quick rundown, My car is not starting due to lack of fuel.
    I have followed Mitchell's diagnostic steps and I have gotten to the point where I am doing a ECU power circuit test.
    The original including the two that I have purchased are all out of specs.
    When I turn the key on all lights on the dash illuminate except for the check engine light.
    I'm not sure where to go from here.
    Please help.
    Thks in advance

    http://www.clublexus.com/forums/ls40...ing-issue.html
  5. Dockof-bay
    12-20-14 09:32 AM
    Dockof-bay
    Greetings from Cailfornia Yamae,

    Can i ask a quick ?. My car is a 2005 LS430 ML Package/ 65000mi. All maintenance done. Cleaned MAF/ Throttle body injected service. Problem: After the engine warms up, and i pull to a stop the rpm drops to around 400rpm, and sometimes shakes a little bit. Battery and alternator just tested fine except with load on alt. it dropped to 13.4.
    Could it be the alternator is starting to go out, but not bad enough to let the battery die?

    Thanks for your help,
  6. MattLS400
    01-11-14 09:52 AM
    MattLS400
    All the best for the New Year Yamae. Your consideration would be greatly appreciated in reference to posts #111 and #113 of the following thread

    http://www.clublexus.com/forums/ls40...to-half-8.html
  7. mmicozzi
    12-25-13 10:22 PM
    mmicozzi
    Yamae,
    I was attempting to do a ripple test on my 1997 LS400. Your thread said to measure voltage between OP1 and E1. My diagnostic port does not have a wire at the OP1 position. Do you have an alternate.
    Thanks
    Matt
  8. Eds98LS
    11-18-12 03:11 PM
    Eds98LS
    Thanks for the reply! Would a dealer be the only company that could confirm it is the ECU if I could not myself.

About Me

  • About Yamae
    State
    Japan
    Gender
    Male
    Lexus Car
    Celsior UCF21
    Year of your Lexus
    1998
    Modifications
    http://blogs.yahoo.co.jp/mae_yas/MYBLOG/yblog.html

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  • Last Activity: Yesterday 09:36 PM
  • Join Date: 08-27-11

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