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Electronic throttle how can i service my ETCS-1 in GS300 Lexus?

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

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

  • 163 Answers

SOURCE: changed battery in 94 lexus GS300, now the check

try to take cables off battery let sit for five or tem min. then put + on first

Posted on Jan 01, 2010

  • 4 Answers

SOURCE: 1998 lexus gs300 vsc lights

its you throttle postion sensor i had the same problem

Posted on Feb 06, 2010

  • 1348 Answers

SOURCE: 1998 Lexus GS300 show code: P1633 ECM Malfunction (ETCS Circuit)

the pedal has a electronic unit that dictates throttle position.the cost is generally 300 for most cars .

Posted on Apr 14, 2010

  • 973 Answers

SOURCE: WHAT IS CODE P0715 ON A 2001 LEXUS GS300

P0715 Input/Turbine Speed Sensor Circuit Malfunction

It seems that you may have a problem with your sensor on or in your transmission.

Posted on Jun 03, 2010

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1 Answer

Code p2118


DESCRIPTION

The ETCS (Electronic Throttle Control System) has a dedicated power supply circuit. The voltage (+BM)

is monitored and when it is low (less than 4 V), the ECM determines that there is a malfunction in the

ETCS and cuts off the current to the throttle actuator.

When the voltage becomes unstable, the ETCS itself becomes unstable. For this reason, when the

voltage is low, the current to the throttle actuator is cut. If repairs are made and the system returns to

normal, turn the ignition switch OFF. The ECM then allows the current to flow to the throttle actuator so

that it can be restarted.

HINT:

The ETCS does not use a throttle cable.

MONITOR DESCRIPTION

The ECM monitors the battery supply voltage applied to the throttle actuator.

When the power supply voltage (+BM) drops below 4 V for 0.8 seconds or more, the ECM interprets this

as an open in the power supply circuit (+BM). The ECM illuminates the MIL and sets the DTC.
If the malfunction is not repaired successfully, the DTC is set 5 seconds after the engine is next started.

Jun 27, 2016 | Cars & Trucks

1 Answer

How do I solve the problemp2118


P2118 Toyota Description
The Electronic Throttle Control System (ETCS) has a dedicated power supply circuit. The voltage (+BM) is monitored and when the voltage is low (less than 4 V), the Engine Control Module (ECM) concludes that the ETCS has a fault and current to the throttle actuator is cut. When the voltage becomes unstable, the ETCS itself becomes unstable. For this reason, when the voltage is low, the current to the actuator is cut. If repairs are made and the system has returned to normal, turn the ignition switch OFF. The ECM then allows current to flow to the actuator and actuator can be restarted.

Possible causes
- Faulty Throttle Actuator Control Actuator
- Electronic Throttle Control System (ETCS) harness is open or shorted
- Electronic Throttle Control System (ETCS) circuit poor electrical connection


Read more: http://engine-codes.com/p2118_toyota.html#ixzz3KLEhNm34

Read more: http://engine-codes.com/p2118_toyota.html#ixzz3KLELlJzl

Nov 28, 2014 | 2013 Toyota RAV4

1 Answer

After getting a p2118 code on my 05 rx 330 i changed the throttle body and module the car goes at least 30mph now but no faster 2-5 mph before the change what else should I try


How about CEL light is it come on again ? Have you check ETCS fuse already remove ETCS fuse check for blown if it ok inspect circuit .If everything ok replace a new throttle body.Good luck

Dec 19, 2013 | 2005 Lexus RX330

1 Answer

Error code P1659


that is it, no other failures or DTC. on car.?
no driving symptoms?
as always, check all fuses!

p1659 = the electronic throttle control system (ETCS) control relay malfunction

aka a relay used in the drive by wire system

"When the voltage from the ETCS control relay is not detected for a set time after the ETCS control relay is turned on when the ignition is turned to ON (ll), or when voltage is not applied for a set time when the throttle actuator (thing that moves the butterfly valve inside throttle body based on gas pedal) is operating, a malfunction in the ETCS control relay power switch is detected and a DTC is stored."

I wouldn't worry about it if the light went away
if it comes back its most likely a failing relay

Sep 10, 2013 | 2007 Honda Civic GX NGV Sedan

2 Answers

Yesterday, engine rotated but failed to start, 20 min later eng cranked but no pwr only 5mph. this morning cranks/runs normally. codes p2119,p2118, p2110. Can anyone advise? 2008 kia optima 4cyl 60,040...


could be your neutral safty swith it is locacted on top of your tranny

P2119

Throttle opening angle continues to vary great from target
throttle opening angle


P2118

Open in Electronic Throttle Control System (ETCS)

power source (+BM) circuit

(1 trip detection logic)

• Open in ETCS power source circuit

• ETCS fuse
• ECM Powertrain Definition Throttle Actuator Control System - Forced Limited RPM

Jan 26, 2011 | Kia Optima Cars & Trucks

1 Answer

Where is the idle control located on 2000 lexus gs300. my car idle is very low almost down to zero when it starts


they are always on the throttle body by the hose that connects to the throttle body push gas pedal look under hood while doing this and you will see the throttle cable moving on throttle body right around there

Sep 15, 2010 | 2000 Lexus Gs 300

3 Answers

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.

Nov 23, 2008 | 1998 Lexus Gs 300

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