Since the Dilly, Dally, Delay & Stall Law Firms are adding their billable hours, the Toyota U.S.A. and Route 44 Toyota posts have been separated here:

Route 44 Toyota Sold Me A Lemon

Sunday, February 12, 2017

Sudden unintended acceleration, Actual road test

Published on Feb 9, 2017
SUA can be easily reproduced in periodic low voltage.
"Forensic Science International 267 (2016) 35–41"
"Experimental study for the reproduction of sudden unintended
acceleration incidents"

Note: the TPS (throttle position sensor)
goes to 100% periodically, while the APS (accelerator pedal sensor) remains at 35.5%.  This “disconnect”
between the positions of the throttle and accelerator – confirm – SUA  IS REAL and CAN HAPPEN.]
Sudden unintended acceleration, Actual road test
Sunny Brown
Published on Feb 9, 2017
(0:34 sec video)
Published on Feb 9, 2017
SUA can be easily reproduced in periodic low voltage.
"Forensic Science International 267 (2016) 35–41"
"Experimental study for the reproduction of sudden unintended
acceleration incidents"

Monday, August 22, 2016
Korean study demonstrates 100% wide
open throttle SUA reproduced by auto
voltage drop
(Notice image:  TPS (throttle position sensor) is 100%, while the APS (accelerator pedal sensor) is only 35.5%.)
[Automakers “would claim” a 100% EDR readout from the TPS “PROVES” the driver MUST HAVE DEPRESSED
Low Voltage Tester -
Ground Offset &
Vehicle Battery Simulator
(47 pages)  (What the Korean researchers used.)
Forensic Science International
Volume 267, October 2016, Pages 35–41
Experimental study for the reproduction of sudden unintended
acceleration incidents
Sungji Parka, Youngsuk Choib, Woongchul Choib
Experimental Study for the Reproduction of Sudden
Unintended Acceleration Incidents
Sungji Park,  Youngsuk Choi,  Woongchul Choi
•Efforts were made to reproduce some cases of sudden unintended acceleration (SUA).
•One possible cause of the SUA were carefully investigated.
•Supply voltage level to the ECU was perturbed to mimic unstable power supply.
•The wide open throttle occurred without intention with the unstable supply voltage.
•Current research reproduced the SUA and provided a possible clue to the SUA.
A few cases of the sudden unintended acceleration have been reported over the last few years [1–11] and
some of them seemed to be somewhat related to an electronic throttle control (ETC) system [11,12] . In this
experimental study, efforts were made to reproduce the cases of sudden unintended acceleration possibly
related to the ETC. Typically, an ETC of the engine is managed based on signals from airflow sensor, throttle
position sensor and acceleration pedal sensor. With this typical sensor configurations in mind, these sensor
signals were checked for noise levels. However, none of them showed any clear relationship with the sudden
unintended acceleration mainly due to the robustness of the ETC logic software. As an alternative approach,
supply voltage to an engine control unit (ECU) was tempered intentionally to observe any clues for the
incidents. The observed results with the supply voltage drop and fluctuation tests were rather astonishing. The
throttle valve position went all the way up to 100% for around one second when the battery voltage plunged
down to 7 V periodically despite that the acceleration pedal position was kept steady. As an effort to confirm the
case, multiple tries were made systematically on a chassis dynamometer as well as on the test road. In this
paper, detailed procedures and findings are reported accordingly.
Sudden unintended acceleration (SUA), Supply voltage drop, Engine control unit (ECU), Electronic throttle
control (ETC), Wide-open throttle
© 2016 Elsevier Ireland Ltd. Published by Elsevier Inc. All rights reserved.
Copyright © 2016 Elsevier Inc. All rights reserved.
Please cite this article as:S. Park, Y. Choi, W. Choi, Experimental Study for
the Reproduction of Sudden Unintended Acceleration Incidents, Forensic Science
Presenter: Sungji Park
Forensic Engineering, National Forensic Service, Seoul, Korea (South)
Oral Presentation 05
10/15/2014 2:00 PM - 3:30 PM
The input voltage of ECU(Electronic Control Unit) was fluctuated from 7V to 14V periodically
and the all of the engine data like throttle valve position, acceleration position, engine RPM,
brake pressure and maximum torque of wheel were recorded.

As results of this study, we found that the periodical low voltage could make the throttle
valve fully open and the car would reach the maximum performance condition. So, the
unintended acceleration could happen without pressing acceleration pedal.
Simulation of Sudden Acceleration
in a Torque-Based Electronic Throttle Controller
by Ronald A. Belt
Plymouth, MN 55447
30 January 2015
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(from page 9 of 25):
IV. Experimental Evidence for Sudden Acceleration
Caused by Low Battery Voltage

Experimental evidence that supports the author’s theory of sudden acceleration has been obtained recently by a research team at the National Forensic Service in Seoul, Korea. This organization is the Korean government’s official automobile accident investigation team in Korea, and it has been looking into the cause of the epidemic of sudden acceleration incidents in Korea for the last several years.Their results show that the electronically operated throttle valve in a late model car with electronic throttle can be made to open to the maximum opening position by voltage fluctuations of 14 to 7 volts on the battery supply line without pressing on the accelerator pedal. Their results were described in an oral presentation given at the World Forensic Festival 2014 meeting in Seoul, Korea on October 12-18, 2014. An abstract of their presentation appears in the published abstract book for the meeting.

7 This abstract is reproduced in its entirety in Figure 5 below. A paper describing their complete findings has been submitted to an international journal and will be published soon after going through the peer review process.

Figure 5. Abstract of an oral presentation at the World Forensic Festival 2014 meeting in Seoul, Korea on October 12-18, 2014
Dr. Ronald A. Belt’s Sudden Acceleration Papers
Dr. Ronald A. Belt: Why I Publish Here
Some Facts About Sudden Acceleration in Mitsubishi Montero Sport Vehicles - 1/1/16
Answers to Some Remaining Questions On Belt’s Theory of Sudden Acceleration - 12/1/15
Unintended Acceleration with a Confirmed Cause – Smaller Tires in Front – 8/1/15
Sudden Acceleration in Vehicles with Mechanical Throttles and Idle Speed Actuators - 7/1/15
Sudden Unintended Acceleration in an All-Electric Vehicle - 2/27/15
Simulation of Sudden Acceleration in a Torque-Based Electronic Throttle Controller - 1/30/15
Dr. Ronald A. Belt: Comparison of Two Electronic Theories of Sudden Acceleration - 9/30/14
Further Details on an Electronic Mechanism for Sudden Unintended Acceleration - 1/6/14
A More Detailed Electronic Mechanism for Sudden Unintended Acceleration - 8/4/13
Sudden Acceleration Without an Accelerator Input - 11/1/12
A Detailed Electronic Mechanism for Sudden Unintended Acceleration - 8/2/12
An Electronic Cause for Sudden Unintended Acceleration - 4/11/12
A Layman’s Account of Dr. Belt’s Theory
[excerpts from page 3:  A Layman’s Account of Dr. Belt’s Theory]
Dr. Belt’s theory also explains why loss of brake function occurs in some vehicles undergoing
sudden acceleration. It is not due merely to the loss of vacuum boost as the engine operates at
high RPM during a sudden acceleration incident. This would cause a hard pedal feel to the driver.
It may also be caused by negative voltage spikes affecting the operation of the ABS brakes, whose
operation is known to depend upon the vehicle’s supply voltage. It is possible that these negative
voltage spikes cause the ABS controller to reset, and that coming out of reset the controller enters
into a temporary diagnostic test mode as it is designed to do each time that the vehicle’s ignition
is turned on. During this test mode, the ABS brakes are cycled through all the normal modes to
see if they operate properly, one of which is a mode that reduces pressure on the brake lines. This
could cause a soft pedal feel to the driver by which the driver’s brake pedal may to go to the
floor as many drivers have contendedThis condition could be caused by a single negative voltage
spike, which also initiates the sudden acceleration, if it is sampled by the microcontroller and used
for calculating the throttle motor voltage correction coefficient
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Dr. Belt’s theory also explains why the sudden acceleration incident rate is higher for older people,
and especially for older women. The reason is that many of these people are retired, and hence make
infrequent shorter trips with their vehicles to the grocery, library, mall, and church, instead of commuting
longer distances each day to places of employment. This means that their vehicle’s batteries run down
more easily because they never get charged back up properly, causing a lower voltage on the vehicle’s
voltage supply line. This lower voltage makes the supply line more susceptible to negative voltage spikes
produced by the inrush currents of radiator fan motors, ABS pump motors, and stop lights. Such negative
voltage spikes are the cause of most sudden acceleration incident.
Artificial intelligence
By Boo Chanco (The Philippine Star)
Updated December 16, 2015 - 12:00am

(selected comment):

Dr Antony Anderson • (16 December 2015)
Your former colleague Engineer Marcial Ocampo provides some constructive
suggestions as to possible contributory causes of SA incidents when a vehicle
is at or near standstill. [“..traffic draining the battery” ] What he suggests
regarding the role of the battery very much complements what Dr Ronald Belt
says in his various memoranda, which you mention later in your article.

Google key words “RONALD BELT AUTO SAFETY”

Your readers might also find this reference from the UK Automobile
Association (AA) regarding automobile batteries useful:

Google key words : “AA FLAT BATTERY ADVICE”

The AA roadside fault finding technique, when going to the help of a
stranded motorist, is to immediately fully test the battery condition, in
accordance with international standards, to see if it is able to hold charge
before doing anything else. If the battery is judged to be in poor condition by
the automated test equipment the AA replace immediately with a new high-quality
battery correctly sized for the vehicle and then carry on fault finding. If the
battery is in good condition they charge it and then carry on fault finding.
What they avoid doing initially is to jump start the engine. The right kind of tester has
to be used, otherwise the battery may appear to be alright when actually it is not.
Being able to start the car with the battery is no evidence of its capability to hold
charge and act effectively in its role of smoothing out transient current demands and
limiting transient voltage drops.

It would be very interesting to know what test protocol Mitsubishi use when
they test vehicles that have experienced an SUA and whether or not it includes
testing the battery BEFORE anyone either starts the engine or charges the

It would certainly be worth establishing what Mitsubishi's policy is regarding the
quality and CCA rating of the batteries that they install in Monteros exported from
Thailand to the Philippines. Owners should most certainly check the manufacturing
date, CCA rating and make of their batteries.

Another related area that SUA investigators ignore at their peril is intermittent
electrical contacts in the main 12V supply - battery terminals and ground terminals.
Also intermittent sensor contacts. Most of the fault detection strategies followed by
the automotive industry assume that a sensor fault is either an open circuit or a short
circuit. In some cases there may be an intermittency - at a relatively high frequency -
which may not be detected as a fault.


This pdf article has some practical suggestions about ways and means of
reducing the likelihood of electrical/electronic intermittencies and discusses
various options for independent fail-safes that would help reduce engine power
in an emergency.

Nearly all auto manufacturers have filed patents for reducing the risk of a
sudden acceleration in the event of an electronic engine control computer
malfunction. If the designers believed in the perfection of their software and
that SUAs were caused by driver error then they would not spend precious time
designing countermeasures to a supposedly non-existent problem. If the DTI do
get around to doing an investigation, they could do worse than visiting the US
PATENT OFFICE and doing a search on fail-safes for SUAs and also on measures
to control runaway diesel engines. Patents often reveal what problems a company
has and what measures they propose to overcome them. Whether or not a particular
patent ever gets implemented is another.

Copyright © 2012. Philstar. All Right Reserved

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