Question about 2004 Lexus LS 430
Recall information you get from the manufacturer
the problem indicates a injector or low fuel pressure problem
Posted on Dec 09, 2017
1. Confirm the customer's complaint of DVD RSE system inoperative.
2. For vehicles with Lexus Navigation System, perform the following procedure to turn OFF the RSE Lock function:
A. Press the INFO button to display the "Information" screen on the navigation unit.
B. Press the "Screen Setting" touch button on the navigation display.
C. Under the "Rear Lock" option, press the "OFF" touch button and then press "OK" in the upper right part of the display.
D. Press the DVD switch on the RSE system, (If a DVD is NOT already in the player, insert one) and confirm screen is "ON" and the system will play DVD's.
3. For vehicles without Lexus Navigation System, perform the procedure to turn "OFF" the RSE Lock function.
A. Push the audio control knob multiple times to cycle through the various options (Bass, Mid, Treble, etc.) until "Rear Lock" is shown on the screen.
B. Turn the audio control knob so the display says "OFF" next to "REAR LOCK".
C. Press the DVD switch on the RSE (if a DVD is NOT already in the player, insert one.) and confirm screen is "ON" and the system will play DVDs.
4. If the above procedure resolves the concern, explain the system operation to the customer. This procedure is described in the "Audio/Video" section of the vehicle owner's manual.let me know lf this helps.
Posted on Jun 16, 2009
SOURCE: 98 lexus gs300 codes p1120 p1121
I wanted to start a thread specifically about failures within the throttle body concerning the GS300 (1998 in my case)
My symptons were:
VSC, VSC OFF, and ENGINE Lights would come on, followed by my car going into Limp Mode, where only that last 25% (if that) of the throttle would respond (basically have to floor the pedal to even move at all).
During the mornings, or when the engine was COLD, the throttle operated normal...then once the car warmed up, usually at about 10 mins, the problem would start...it happened intermitantly at first...1 or 2 days over the course of a week, then it became more consitent, until last week it became a daily problem.
The first part I tried was the Throttle Position sensor, which is on the front side of the throttle body, and the easiest thing to replace...this didnt help at all. $300 part from Lexus, $80 part from RockAuto.com (exacly same part toyota OEM)
THE PART THAT FIXED THE PROBLEM:
"Idle Valve Motor", which is the larger electrical object next to the TPS on my 98 GS300. Problem is solved.
The Codes I got were P1120 and P1121 - Accelerator Sensor problem. However it wasnt really the Accelerator Sensor, it was indeed to actual electrical Motor that controls the opening of the Butterfly valve inside the Throttle body.
I found the problem by good old trouble shooting, and using an ohm meter to see if the throttle electric motor was getting elev, I found that the elec motor just to the left of the TPS was basically freaking out and shutting down. The Accelerator Pedal Sensor is on the Back-side of the throttle body where the throttle cable connects to, and has a spring on it. It was fine.
GS300's are indeed "drive by wire" concerning the throttle...the cable triggers the Accel Pedal Sensor, which sends a signal to the ECU, the ECU then sends power to the Idel Valve Elec Motor (next to the TPS), which opens and closes the mechanical butterfly valve, then the TPS sensor detects how far the elec motor is actually opening the butterfly valve...its a closed-loop feed-back system, meaning any failure in any sensor will cause the entire systm to fail.
The throttle cable apparently is ONLY there to allow the fail-safe of having that last 10-25% throttle when the electronic system fails...there is a gearbox inside the throtle body which allows the tail end of the throttle to manually engage the butterfly valve...the rest of the time, the butterfly valve is 100% opened and closed via the idle control motor.
Posted on Jul 08, 2009
VSC means Vehicle Stability Control.
It comes on when the sensor send a signal that the vehicle is not stable on the ground.....check the wheel balancing and alignment and the air pressure of your tires too.
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Posted on Aug 23, 2009
there is not a reset for the tire pressure monitor system, the system resets its self when all tires are inflated to the proper psi. 35 psi . dont forget about the spare. if all tires are properly inflated check the "2nd set" switch. it is located under the dash on the passenger side. sometimes they get bumped accidently. unless you have a 2nd set of wheels with sensors the switch should be set to "main"
Posted on Oct 15, 2009
Did you try with the key? The keyhole is in the top left corner in the trunk by license plate (opposite to the camera lens).
Also, make sure the valet button in the glove compartment is released (or pressed)
Posted on Jul 27, 2010
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