ECU/TCM replacement advice?

SLIPMATT

MEMBER
1996 MAZDA FRIENDEE
2.5L
4 CYL
TURBO
4WD
AUTOMATIC
150,000 MILES

Mazda Bongo Friendee SGL5 / 4WD/AT
Most cold starts the following happens:
• Fans running
• No glow plug light
• No aircon
• Limp mode

Occasionally it will start normally but will overheat.

We suspect the TCM is faulty as per https://www.2carpros.com/questions/possible-ecu however since it does work sometimes, could it be the wiring instead?

Getting a replacement part shipped to Australia is expensive, especially if it is not the root cause.

Thanks.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
42,967 POSTS

Did all of these problems start at once? Also have you run the codes to see what comes up. I would do a CAN scan which can tell you which module is out or if there is a wiring connection problem. The scan is easy to do.

You can get a CAN scanner (Controller Area Network) from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

This way we can confirm the problem before you need to ship any parts.

ECU/TCM replacement advice?

1 Reply

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