CVT gearbox going in reverse but not forward

Forum for Engine, Exhaust, Drivetrain, ECU
rad87
Posts: 10
Joined: Fri May 21, 2021 10:07 pm
Qashqai Model: Mk.1 Qashqai - J10 (2006–2013)

Post by rad87 »

Hello all,

I am a proud owner of a Nissan QQ 2013 J10 1.6 CVT.
I have searched the forum but have not seen anything similar to what I am experiencing. My gearbox has been running fine until one day I stopped at a red light. When it went green and wanted to move the gearbox juddered and did not move forward. Funny enough reverse works fine. When I checked ins codes, gearbox shows 47 faults and one is a U1000 CAN issue. Have checked all wiring looms and seem ok. Anybody had something similar? Thanks!

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gloucester
Posts: 5173
Joined: Sun Apr 03, 2016 7:04 am
Location: Gloucestershire, England
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Post by gloucester »

Welcome to this forum.

I've not seen that issue discussed here previously.
(2015 Nissan Qashqai Tekna DIG-T 1.2 sold 15/6/18) ~ 2018 Suzuki Ignis SZ5 - 2018 Yamaha MT-07 ~ (2024 Volvo EX30 ordered)
rad87
Posts: 10
Joined: Fri May 21, 2021 10:07 pm
Qashqai Model: Mk.1 Qashqai - J10 (2006–2013)

Post by rad87 »

Hi gloucester,

No, I haven’t seen it anywhere.

Did some more tests and found something very odd- if I introduce a fault in CANBUS- pull a plug out from ecu whilst in ignition- car start at to react when put in D. You feel the specific judder when gear is in. When you clear the faults, reverse works fine, Drive is gone again. I am leaning towards the TCM being shot dead as the live value function from TCM works partially or just shows that is not supported... any comments welcome
Qashowner
Posts: 564
Joined: Wed Apr 17, 2019 10:07 am
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Post by Qashowner »

Hi, I presume the TCM is the electronic brain for the gear box. I also belong to the Mercedes Benz forum where CVT gear boxes "fail" because of the electronic box failing, not a fault of the gear box.

You cold try these people ecutesting.com based in Derbyshire, don't know if they can help with Nissan
Past cars Mercedes B Class, S Class, E Class Estate, E Class Coupe, G Wagen, 260E interspersed with Peugeot 406 and Audi Coupe.
rad87
Posts: 10
Joined: Fri May 21, 2021 10:07 pm
Qashqai Model: Mk.1 Qashqai - J10 (2006–2013)

Post by rad87 »

Qashowner wrote: Sat May 22, 2021 11:27 am Hi, I presume the TCM is the electronic brain for the gear box. I also belong to the Mercedes Benz forum where CVT gear boxes "fail" because of the electronic box failing, not a fault of the gear box.

You cold try these people ecutesting.com based in Derbyshire, don't know if they can help with Nissan
Thank you! I’ll give them a buzz on Monday.
DaveBerlin
Posts: 8623
Joined: Wed Mar 19, 2014 12:39 pm
Location: Berlin, Germany
Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–2021)

Post by DaveBerlin »

Rad87, welcome been on this Forum since 2014 and I have never heard this mentioned. I have added an attachment might be worth a read. Have you not got any Auto Gearbox Specialists in your Area whose Brain you could suck ! - Dave 👍

CVT transmission – How does it work? : https://autoportal.com/articles/cvt-tra ... -6660.html
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rad87
Posts: 10
Joined: Fri May 21, 2021 10:07 pm
Qashqai Model: Mk.1 Qashqai - J10 (2006–2013)

Post by rad87 »

Hi Guys, just a quick update, hooked up the car to a decent obd and it read out P0967 PC solenoid B signal high- seems that a solenoid died on me! I am getting prepped to change that and will update when done. Fingers crossed that this will solve it!
rad87
Posts: 10
Joined: Fri May 21, 2021 10:07 pm
Qashqai Model: Mk.1 Qashqai - J10 (2006–2013)

Post by rad87 »

Hey, still fighting with it. These are the readings I’ve got from cvtz50


When you select reverse, slip goes to +127 and car moves no problem...

Any ideas why this is happening?

Cheers!
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calnorth
Posts: 2719
Joined: Mon Feb 11, 2019 2:01 pm
Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–2021)

Post by calnorth »

I haven't seen a system diagram for this box before until I viewed the following Youtube vid. The system control I/O chart appears at about 3.30 mins in. I know its not much help to the topic but will likely enlighten many of us passing by:

I don't have any diagnostics for this box. So, a fair number of items to check.

.........
Mk2 Qashqai Facelift - J11b (2017–and onward)
1.6 Dig-T N-Connecta
Qashowner
Posts: 564
Joined: Wed Apr 17, 2019 10:07 am
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Post by Qashowner »

https://www.jatco.co.jp/wp-jatco/wp-con ... ucts_e.pdf Have a look at the attached, apparently if you have the Jatco CVT7 also known as JF015SE there is an auxiliary gear box operate reverse. It is inside the gearbox so looks expensive. If you have the CVT8, they know of a problem with burning out the clutch according to the print. Worth a read.
Past cars Mercedes B Class, S Class, E Class Estate, E Class Coupe, G Wagen, 260E interspersed with Peugeot 406 and Audi Coupe.
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