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Toyota MR2 ECU removal

Not too long ago my Toyota MR2 was having a weird problem. The car would be able to start, but after running for a while it would stall, and have very bad air fuel mixture, black smoke and all. After consulting with several owners, one suggested that I check for leaked capacitors on the ECU as that might be one of the causes.

Toyota MR2 ECU
ECU located at the rear boot

The ECU on second generation Toyota MR2, in this case a 1991 3S-GTE version, is located at the rear boot wall that is seperating the boot from the engine, just behind the carpet. You will need a Philip screw driver and if I remember correctly, a 9 or 10 mm wrench to undo the mounting.

Toyota MR2 ECU
look at the 3 connectors at the bottom of the ECU

There are 3 connecting sockets located at the bottom part of the ECU. You should be able to disconnect them without much effort. The 3 connectors are of different sizes, you can’t go wrong when putting the thing back together. Do note that you should always disconnect the car battery and properly ground yourself before diving into such endeavour.

Toyota MR2 ECU
the 3 connectors

The ECU consists of two PCB boards, take off the 2 screws connecting both and you will be able to expose the innerds. In my case, I did not find any leaking capacitors. The problem was later found out to be caused by a faulty airflow sensor.

Toyota MR2 ECU
the capacitors on the ECU

More technical info on MR2 can be found on this page, including the Engine error code and how to diagnose them.

Test Drive – 2.3 liter Mazda 6

Mazda 6 is the Japanese car maker’s flagship sedan going head to head in the market dominated by Honda Accord and Toyota Camry. I was fortunate to test drive the 2.3 liter Mazda 6 a couple weeks ago at the Mazda showroom in Petaling Jaya during their launching of the long awaited Mazda 3 in this country.

Mazda 6 2.3 liter test drive, front view
the handsome Mazda 6

The 2.3 liter powertrain is good for around 166 hp, similar to the 2.4 liter iVTEC engine from Honda Accord. The Mazda, however, feels a lot more zippy during acceleration (8.9s to 100km/h). This might due to the curb weight of 1390kg, some 60 kg lighter than the Accord. As I floored the accelerator while in the fully automatic mode, the engine revved up to almost 7,000 rpm before switching gear, I guess the 6 does deliver some zoom zoom spirits.

Mazda 6 2.3 liter test drive
a nice driver’s car

The 6 speed triptonic gives you the flexibility to change gears when you feel like having some spirited drive, and it is intelligent enough to not let the driver over-rev or bog down the engine. As I found out when putting the car on 2nd gear driving up hill, when the I stopped the car, it automatically dropped to 1st. Very nice. The car feels pretty good around the bend too, does not have too much body roll for a car it’s size.

Mazda 6 2.3 liter test drive, the cockpit
the cockpit of Mazda 6

The car looks great on the outside, the interior does not dissapoint either. The 2.3 liter version comes with full leather interior, including all the seats, door panels, and even the shifter and handbrake. In dash 6 CD changer comes standard with a pretty decent in car steroe system.

Mazda 6 2.3 liter test drive, 6 speed transmission
6 speed automatic with tiptronic

The cockpit backlight is red in color and are pretty driver oriented. Other than the standard speed, techo, water temperature and fuel, the gear is also displayed, very useful while on tiptronic mode. Stereo and auto cruise controls are conviniently placed on the steering wheel.

Mazda 6 2.3 liter test drive, center console
the center console

Instead of the usual 2 air conditioning vents in the middle, the 6 comes with 3, this is pretty good for the rear passanger. However, there is no individual climate control like the one found in the 2.4 Honda Accord. There is only one single temperature control.

Mazda 6 2.3 liter test drive, side view
2.3 mazda 6, side view

Priced at around RM 160-170 thousands, the Mazda 6 2.3 is in direct competition with the 2.4 Toyota Camryand Honda Accord. While 2nd hand value of Mazdas might be lower in this country as compared to the other two Japanese brands, the Mazda 6 does offer a very good alternatives for it’s performance and arguebly higher asthetics. If only they offer the 2.3 turbo version that puts out 273 HP..

Extra: video of Mazda 6 on the mazda malaysia website here.