G Vectoring Control

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I was waiting for the projector cooling fan to stop when one of the participants came back.

We had just finished an hour training session on G Vectoring Control.

It won’t be true to call it a training session, it was more of a discussion.

This session was not in our calendar.

There was a reason for arranging it.

A customer had approached one of our workshops with a strange demand.

He wanted to install G Vectoring Control in his old Mazda 6!

Like any other Mazda customer, he was young at heart, tech savvy, and demanding.

He read about G Vectoring Control on Mazda USA website and at once decided to spice up his Mazda 6.

“I am a computer engineer Sujumon… I think you know that!… My car has everything… ABS, EBD, Stability Control, everything!… All hardware is there… This is just a software… I know that…You just install it… I will pay you whatever you want… Change the control unit… No problem… give me the software if you can’t… I will do it myself”

It was a little difficult to convince him that G Vectoring Control is different from the Stability Control in his old Mazda 6.

While stability control in his old car is is all about yaw management,  G Vectoring control deals with managing pitch.

G Vectoring Control

“This torque thing… it is in my brother’s Audi… nothing new!”

“That’s different Ayman… That is Torque Vectoring Control… it is for Yaw management… G Vectoring control is different… the subtle variations in vertical loads on tyres  is the key here…”

“Controlling vertical loading on tyres! Oh, come on… Sometimes you forget that… how many times I told you my BS is in Mechanical Engineering!”

I explained to him about the load transfer during acceleration, deceleration, and braking. And, how deliberate, precise control of wheel vertical loads can make driving more enjoyable.

“Precise variations in engine output quick enough to enhance vehicle handling at all speeds… that is Mazda’s way of achieving this … You need a SKYACTIV engine for this.”

At some point I felt that he was just pretending not to know. I have seen many Mazda customers like that. Hope you remember Hassan. Crazy about cars. A car is a matter of their heart… not of brain.

The service adviser remained a mute spectator. A ‘why did you hide all these from us’ expression was evident in his eyes and body language.

Usually I design courses keeping in mind what is essential for the participants. Sometimes, not sometimes… almost all the times, I am forced to omit the science behind the technologies… and sometimes, some customers take advantage of it and cause embarrassment to our team.

This session was a move to discuss the science behind G Vectoring Control.


I was waiting for the projector cooling fan to stop when one of the participants came back.

“Sir… sorry for troubling you… the vertical load…  how can it change!… pitching and yawing are about two different axis…”

“…when you brake only one wheel, there is yaw moment…it is clear to me… when you give more torque to one wheel… then also… but…”

I knew where he was going.

I thought of The Physics of Racing.

I felt the topic cannot be explained better and simpler.

“Read it… any doubts, let me know… we will discuss”

It is more than a month.

No news from him till today.

And “No news is good news” holds in this part of the world as well.












Why I discontinued the edX course …

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A google search for study materials on fundamentals of mechanical vibrations a few months back led me to an exotic world of free online learning.

Yes, I am talking about edX [Let me warn you, it is highly addictive].

I became a regular visitor and tasted many of the archived courses.

edX 1

There were many subjects  I have been longing to learn for long.

Great teachers. With due respect to all those who taught me in schools; a class apart…

And great instructional technics…

And the freedom to take the courses at one’s own pace and convenience…

I soon found myself addicted to www.edx.org

One course that caught my attention recently was the Introduction to Marketing course, started in January 2016.

edX 2

Why Marketing!?

You may be wondering…

What is that interesting in marketing for an automobile engineer who is almost lost among machines?

It is something like…


What shall I compare it to!?

The little swallow of Happy Prince may understand it better!

Yes… the little swallow!

Anyone remember the little swallow in Oscar Wilde’s Happy Prince who courted the ‘most beautiful reed’ the whole summer?

“He was flying down the river after a big yellow moth, and had been attracted by her slender waist that he had stopped to talk to her”

Wasn’t it something similar?

I followed the course diligently the next couple of weeks…

It was contagious…

Soon the twelve year old left the online magic courses and joined me in edX with an archived course in Geometry.

edX 3

The improvement he made in Geometry in three weeks! You have to see it to believe it.

A CRDI engine with a strange complaint at a distant location and a level 3 course in NVH troubleshooting kept me away from edX for a few days.

By the fourth week of January when I sat with the twelve year old again he was completing a survey at the end of the geometry course.

“How do you compare this course with the courses of Khan Academy?” a seemingly innocuous question in the survey had an option “I don’t know about Khan Academy” as answer which was duly selected by the twelve year old.

We never heard of Khan Academy before. Neither son nor father.

The twelve year old did start another edX course in Algebra the same day. But the third day he dropped out of edX.

edX lost one of their customers to Khan Academy!

Segmentation, Targeting, Positioning, Branding… By this time I had started planting terms like these in casual conversations with unsuspecting colleagues.

“So he flew round and round her, touching the water with his wings, and making silver ripples”

And the twelve year old left edX for Khan Academy which was totally unknown to him till the survey at the end of the geometry course.

Someone comes to buy a car from you. A FXXX or a TXXXXX or a XYZ…

You take him around…you explain the features…you let him drive the demo car… and when he is about to leave, he has not made a decision yet, you ask him ‘How do you compare our XXXX with the SKYACTIV Mazdas?’

‘SKYACTIV? Mazda??’ it seems the customer is unaware,  one moment please… this is just an example… but I have seen recently a Nokia 3310 owner, an aged vegetable vendor in our village ridiculing his friend’s touchscreen mobile “12000 bananas! And not even a single button!”

So what do you think? Will the customer forget the ‘SKYACTIV’ and ‘Mazda’ on his way home and come back to take one of your cars?

I don’t expect that… he may come back… in his new SKYACTIV Mazda3 or CX-3, if he could pull his heart off the charms of the MX-5… to thank you!

That question of yours was a blunder my dear!

So was the survey question from edX. “How do you compare this course with the courses of Khan Academy?”

I am not here to compare Khan Academy with edX. I am leaving it to you.

I felt disillusioned with the edX course in marketing… How can I continue after I see them making such a blunder!

“You have been trifling with me”, the little swallow cried, “I am off to the Pyramids. Goodbye!” and he flew away.


MazTech Middle East & Africa 2015

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It is hard to reach the top…

MazTech 1

How is it to remain there…

IMG-20150902-WA0022 (2)

Ask Team Galadari who retained the Top Spot at the recently concluded MazTech ME & AF


Six steps…

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Lady luck is always with HXXX MXXXX.
Juicy, ripe, examples are just waiting everywhere for him to pluck.
Oh I forgot to tell, HXXX MXXXX is a trainer I adore, try to emulate, and sometimes envy.
Like all those who attend his classes I too eagerly wait for moments when he is stuck. But as I told you, luck is always with him.
We think he is stuck… soon he will say “I am sorry, I don’t no” or ” Let me check with MXXX”. [MXXX is his boss in Japan] or something similar… But… See what happened last week!
It was a level 3 session.
First day of the course Basics of Troubleshooting. A prerequisite for the advanced troubleshooting courses.
The participants!?
All skilled diagnostic technicians… hardcore professionals with years and years of experience in troubleshooting…
And HXXX MXXXX was teaching them basics of troubleshooting!

“I know it will be a little boring… But, you know, you have to complete this for Masters Certification… we are very rigid on the Masters curriculum… there are reasons… I know you all… what you are capable of… but we have to…”

Less than an hour into Six Steps of Troubleshooting and…

“Mr. HXXX, collecting information, analyzing symptoms, blah, blah, blah… we do this everyday… as troubleshooters this is what we all do every day… shall we skip this course?… shall we go directly to Advanced Body Electrical Troubleshooting?” They are ruthless even with revered trainers like HXXX MXXXX.

HXXX MXXXX stood silent for a moment. Then adjusted his tie… looked at his watch…  “All right gentlemen… we break for lunch… 45 minutes earlier… come back at two… sharp two”

And he went to the workshop while we headed towards the dining room.

Tricky situation. Trainees have lost interest in the topic. They question the relevance of the course. We were sure Mr. HXXX is at his Waterloo at last…

We had a quick lunch.

All of us were eager to be back in the training room.

“Let’s move to the workshop.” HXXX MXXXX was waiting for us near the elevator.

He took us straight to bay number 23.

Bays 23 to 25 belong to electricians. SXXX KXXXX, a very experienced electrician was at 23, beside a sports car…

“Why not Mr. HXXX?! I am happy to share all I know…I got her this morning. Haven’t touched her yet. Busy with a Radar Cruise Control System complaint. Accident repair at a local garage! They cooked up the wiring… this girl came three days back… not starting… cranking is fine…JXXX and KX SXXX tried… they tried for two days…today TXXX gave her to me… they think it is electrical… PCM may be…”

“Gentlemen… this is our baby… you have time till SXXX tames the Radar… let’s start.”

A short while later…

“PCM… can we have a PCM?” they were unanimous…

“PCM!… so quick! … PCM!! … why?… WHY?… gentlemen, why PCM?”

“We checked with JXXX and KX SXXX… everything else is fine… air fuel ratio at start is not correct… PCM is the only thing remaining.”

SXXX KXXXX stared at his trainees… the trademark twinkle in the eyes is back…

I saw a cloud of uneasiness descending on the trainees…

“Let’s have a word with JXXX and KX SXXX… guys, what was the customer complaint?”

“Engine not starting sir… cranking is fine sir”

“No sir… we didn’t see the customer… the recovery truck dropped it here sir…”

“No sir… he didn’t say anything…”

“CXXX AXXXX may be knowing it sir…”

“Good afternoon Mr. HXXX… no, I didn’t see the customer… she just gave me a call… we sent the recovery truck…”

“No Mr. HXXX… sorry I was too busy… I didn’t ask…”

After a moments silence…

“Gentlemen… now recollect what were discussing this morning… yes… six steps of troubleshooting… what’s the first step?”
“Collect the information! Correct!…but… did anyone do that?”

The trainees turned their faces towards JXXX and KX SXXX.

“No sir… we don’t talk to customers… service advisors do that sir…”

All faces now turned towards CXXX AXXXX, the service advisor who received the car.

“Did you ask me?… did you ask me anything?… they didn’t ask me a thing Mr. HXXX… now putting the blame on me…”

“It’s ok CXXX… You carry on… let’s move to training room… ”

“Gentlemen… let’s go back to the six steps. First step… yes… collect the information… can you tell me the sources of information?”

“Customer! Yes! The most important source of information. Let’s start with the customer. Who’s going to do the diagnostic interview? You have to concentrate on… yes… three Ws and one H! Can anyone tell me what do they stand for?… okokok…WhatWhenWhereandHowmuch… don’t forget them during the diagnostic interview. Plan the interview and call. Have a clear idea what to ask. Minimum questions. Easy to answer questions… Twenty minutes to plan”

“Things are clear now. It was a hot day. Customer was filling fuel from a fuel station in Al Ain road. Around 100 kilometers from start… yes yes the engine was running… then she heard a loud bang noise… like a firecracker… bang … from the engine compartment… then the engine stalled. A gas station attendant opened the bonnet and there was smoke… and the engine never started again… yes yes normal cranking”

“Gentlemen… what next?… information from manufacturer… exactly… service information from manufacturer… then, information from distributor… about similar incidents”

At this point one of the trainees interrupted. “We had a similar case Mr. HXXX, a couple of years ago. Engine stalled during refueling. It was…”

“Interesting… see gentlemen…. it is possible… let’s go to the car… As SXXX explained, it can be easily verified with a vacuum gauge.”

And… it turned out to be the same case.

The discussions went off track, for a while, before HXXX MXXXX could resume with Basics of Troubleshooting.

Basics of Troubleshooting course continued, as planned, for three days.

And it turned out to be one of the most useful training sessions we ever had.

MazTech Reward Ceremony 2014

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They did not try to win…

They just tried to be perfect…

Safe Journey to Team Galadari

Noise, Vibration, and Harshness

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It was on our thirteenth descent that I brought psychoacoustics into our conversation.
A little after 3 pm when I got a call from the service reception I had no idea what was in store.
“Arnold sir has some noise issue… Jerry couldn’t find anything… could you please…Arnold sir is …”
Jerry is our road tester.
I did not wait for the service advisor to complete.I was in the middle of a training session.
Soon I was on the road with a well dressed gentleman in his early fifties.
It was a strange complaint.
An abnormal whistling sound for a brief period from the front right side when the vehicle completes the steep descent from Qantab and enters the highway, after a tight 270 degree turn to the right.
The vehicle has to descend at 30 km per hour, the brake has to be applied and released once nearly 100 meters before the tight right turn, and, there it is, exactly when the vehicle enters the highway.
He did the descent four times, but could not duplicate. Then he asked me to try…
“Oh no… the speed was a little high… it is very sensitive to speed…”
We enter the highway again, take the exit after 3 km, come back to palace roundabout 7 km away, take 11 km up the winding road and prepare ourselves for another descent.
His wife had noticed it the first time the previous Thursday evening when they were returning after a party at the hill resort.
“no no no… you should not apply brake this hard… it has to be light… very sensitive to braking force also…”
Again the exit after 3 km…
“I tried many times… it does not come when my children are there at the back… there should be only two persons in the front… very sensitive to load on the front seat also…”
“no no no… you should not turn the steering this hard… it has to be smooth… otherwise it will not come…”
By the eighth descent I could gather enough information about the history of the vehicle.
Some noise complaints are difficult to verify… we know such noises will in no way affect the performance of the vehicle or jeopardize the safety of the passengers…
Moving vehicles make a lot of noises however smooth the road may be.The noise of engine and drive line will be masking these noises in most of the vehicles and customers will not be feeling them. When they change to vehicles with extremely silent engine, transmission and steering systems, they will start noticing noises which they never heard in their old vehicles…
And then there are customers like the one I was having… a user of Mazda6 for years. “It used to be like in a glider before…”
I too loved that trip down the mountains in a Mazda6. As the customer said “like in a glider…” and the 270 degree turn! The weightlessness you feel and the cool sensation you have in your brain and body when you end the descent and join smoothly the highway… it is pure ecstasy…beyond comparison… just the blink of the dynamic stability control indicators that reminds you that you are with a machine… how nasty a whistling noise can be then!
But where is the noise!?
He got the car back after an accident repair the previous Wednesday. The next day the noise!
The situation was not something new to me…customers being skeptical about accident repairs… customers developing an aversion towards the vehicle after accident repairs… a noise there… pulling to right (sometimes!)… hard to steer (sometimes!)…poor brakes (sometimes!)… all psychological… and most of them end up disposing their cars within a week or two…giving a dog a bad name and…
A little psychological approach was all that needed. Counseling? Sometimes there are no other choices.
“I could not find anything abnormal”
“No no no Mr….uh… Mr.Suju, my wife heard this first… I too heard it thrice… now it is not there!… I am sure there is something wrong!”
“I can’t find any abnormal noise… it may be just a feeling… ”
I started with a mild dose of psychoacoustics lessons, followed by more psychological treatment, taking utmost care that he does not feel it…
I let him have my headphones of the wireless chassis ear and play with the channels while I drove…again psychology… bringing him to my seat…
“So you say it is an auditory illusion!” he told in a tired voice and fell into a deep silence.
Three kilometers later when I put the indicator to right again, “no no no… I have an appointment at seven… already late…”
I left him at the reception and straight went to my trainees.
Later that evening…
“Sir,what you did with Dr. Arnold? He seemed a little upset after the road test.”
“Yeah… professor and head of the department of psychiatry at SMU”
“You could have told me that!”
“Told what!?”
I never told him what happened.
Dr. Arnold still uses that car. He never complained about the noise after that day. He recently took a CX5 for his wife.

A Green Mazda

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Green Mazda

A green Mazda!?


There are moments…

Rarest of rare

That make even a Mazda green… Green with envy…

Here is one


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