MR2 Roadster Owners Club

The Workshop => Maintenance, Problems & Troubleshooting => Topic started by: AJRFulton on June 30, 2021, 18:51

Title: Speedo not working.
Post by: AJRFulton on June 30, 2021, 18:51
One of the wheel speed sensors was very obviously broken, so replaced both (bastard of a job!)

However speedo is still not working. No fuses appear blown. What else could it be?

My lift has stopped engaging since speedo failed, and it's still not engaging.
Title: Re: Speedo not working.
Post by: JB21 on July 1, 2021, 08:05
Happened to mine when part of the ECU blew when hooking jump leads up. On mine you could clearly see a burn mark on the ECU where it had popped.
Title: Re: Speedo not working.
Post by: tommyzoom99 on July 1, 2021, 09:05
Quote from: AJRFulton on June 30, 2021, 18:51One of the wheel speed sensors was very obviously broken, so replaced both (bastard of a job!)

However speedo is still not working. No fuses appear blown. What else could it be?

My lift has stopped engaging since speedo failed, and it's still not engaging.

the speedo uses the abs sensors, so maybe one of them has died happened to me before.

cheers tommy
Title: Re: Speedo not working.
Post by: AJRFulton on July 1, 2021, 09:34
Quote from: tommyzoom99 on July  1, 2021, 09:05
Quote from: AJRFulton on June 30, 2021, 18:51One of the wheel speed sensors was very obviously broken, so replaced both (bastard of a job!)

However speedo is still not working. No fuses appear blown. What else could it be?

My lift has stopped engaging since speedo failed, and it's still not engaging.

the speedo uses the abs sensors, so maybe one of them has died happened to me before.

cheers tommy

Which I just replaced. One had been obviously damaged replacing a wheel bearing (rubber mallet related accident), which was when the speedo stopped working intermittently. I don't really use the speedo so just left it, but this is also when all my lift issues started.

Car doesn't have ABS anymore, I deleted it a couple of years back.
Title: Re: Speedo not working.
Post by: AJRFulton on July 1, 2021, 09:35
Quote from: JB21 on July  1, 2021, 08:05Happened to mine when part of the ECU blew when hooking jump leads up. On mine you could clearly see a burn mark on the ECU where it had popped.

I'm using the Apexi FC. It seems to be working fine.
Title: Re: Speedo not working.
Post by: JB21 on July 1, 2021, 10:07
Quote from: AJRFulton on July  1, 2021, 09:35
Quote from: JB21 on July  1, 2021, 08:05Happened to mine when part of the ECU blew when hooking jump leads up. On mine you could clearly see a burn mark on the ECU where it had popped.

I'm using the Apexi FC. It seems to be working fine.

Sounds like wiring then, follow it back from the speed sensors. Regarding no lift, check the OCV filter(s) even slightly clogged and the ECU with cut lift. If clean, then check the OCVL (lift control valve) works as it should. Mine was intermittent for months before it gave up.
Title: Re: Speedo not working.
Post by: AJRFulton on July 1, 2021, 10:16
It's a newly built engine. All parts involved in lift are new.

It's the third engine I've had lift issues on. I'm getting continuity on the wiring as well 😕