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Les deB Profile
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X-TRAIL NEWBIE
 


Date Registered: 11-2010
TOTAL POSTS: 29
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Re: CVT Transmission Locking


The gear shift getting stuck in "Park" is getting worse over the last couple of weeks. Doesn't matter whether on hill or flat, or foot on brake before/after ignition turned on. It happens about 80% of the time, to the point, I have a little piece of wood on the dash to push the Gear Shift Release when it gets stuck.

I've booked it in for a check on Warranty, andwas told that it may not necessarily be a warranty issue - why? Anyway, will find out tomorrow.

Just a foot note to pressing the Gear Shift Release. Before using the piece of wood to release it, we were using the ignition key. I received a "panic" call from my wife, saying the gear shift was locking again, and she used the ignition key to release it. Since doing that, the hazard lights were flashing whilst driving even though they weren't turned on, and she was now at the petrol station and the petrol cover would not open!

It appears that when she used the ignition key to release the Gear Shift, she unwittingly pressed the Ignition lock button on the key. This cause the hazard lights to operate when driving, and also locks the petrol cover. I told her to press the unlock button on the ignition key, and this would solve the problem.

I only knew about this becasue the same thing happened to me when using the ignition key to unlock the Gear Shift. I pressed the ingition key lock button and drove off with the hazard lights flashing until I got home and realised what I had done.

Les
20/Jan/2011, 10:09 pm Link to this post Send Email PM   Send Private Message Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6355
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Re: CVT Transmission Locking


Have them check the adjustment of the brake switch Les.

---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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20/Jan/2011, 10:32 pm Link to this post Send Email PM   Send Private Message Blog
 
Les deB Profile
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Date Registered: 11-2010
TOTAL POSTS: 29
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Re:


Received my car back from the dealer, with problem fixed - hopefully. Was told that they had to "rework shift release switch" to solve the problem. No parts required, and was completed under Warranty.

Will see what transpires from here on in...................................?

Les
21/Jan/2011, 4:33 pm Link to this post Send Email PM   Send Private Message Blog
 
Translucidus Profile
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Date Registered: 05-2010
Location: Adelaide
TOTAL POSTS: 599
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Re: CVT Transmission Locking


I'm now having the same problem with the shifter randomly being stuck in P(ark) with foot on the brake, engine running and it's driving me nuts.

It will happen even if I've been driving, stop to open the garage (leaving engine running) and get back in the car.

It's happening more frequently lately and seems to have occurred not long after I recently (2 weeks ago) disconnected the Battery for 2 seconds to reset the Bluetooth.

I've noticed it doesn't seem to be related to any of the switches (could be wrong). The brake switch actually is a two-stage switch; first level is the shifter interlock switch and then the brake lights etc (this is confirmed by the wiring diagram and also by pressing the brake pedal so the switch can be operated by a finger - first the shifter solenoid operates then the brake lights a mm or two later)



When I disconnected the battery for 1 minute the problem disappeared for several days but now it's acting up again.

Waiting for a few seconds after starting seems to help as does revving the motor a little so I wonder if the BCM controls the solenoid via the logic for this operation by receiving input from the brake switch, engine state (on) and Shifter position switch (in P or not).

I also wonder about the battery - it's 3+ years old (Panasonic) and seems to drop to 9volts during cranking although it sits on about 13.2 engine off etc and did pass a recent check at my 40k service.

Funny if this all turns out to be the battery (i don't want a new one yet as the car still starts fine).

Any ideas guys???

Last edited by Translucidus, 15/Apr/2011, 10:21 pm


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2007 X-Trail T31 ST-L

Xy going vertical at Bendleby Station . . .

15/Apr/2011, 10:05 pm Link to this post Send Email PM   Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re:


I won't be suprised if it is the battery, as the T31 batteries seems to die around the 3 years mark as recently experienced by Scot and others. The optimal battery measure is around 14.6v while the car is running with all lights and accessories off and will drop to around 13.8-14.2v with the headlights lights on.

---

16/Apr/2011, 5:05 am Link to this post Send Private Message MSN Blog
 
cooch t31 Profile
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Date Registered: 06-2008
Location: Blue Mountains, NSW
TOTAL POSTS: 5966
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Re:


An auto electrician will soon tell you if you need a new battery. At least then its peace of mind.

---
Tony X-891c

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HERE is my old 2008 T31, ST Series1

16/Apr/2011, 5:41 am Link to this post Send Private Message
 
Translucidus Profile
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Date Registered: 05-2010
Location: Adelaide
TOTAL POSTS: 599
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Re: CVT Transmission Locking


I've decided the Battery is fine and have been exploring other easy options before taking it in for a warranty fix - may seem strange approach when Nissan would fix for free but:
A/- If it's a quick and easy fix then I'd rather not spend hours of my time waiting in the dealer lounge.
B/- Investigating myself is a great way to learn about the car and it's design; great for fixing when out bush.

On looking at the circuit diagram it's not a complicated system - just the Ignition/Brake switch/Park position Switch/Solenoid/Earth Point in series.

I decided the easiest think to start with was the Brake Switch which is actually two switches in one. As the Brake pedal is pressed it first releases switch 1 (Brake Lights) the about 2mm brake pedal travel later switch 2 functions and sends 12volts to the Park Posn. Switch.

Spent $57 on the switch, eventually discovered how to replace it (easy; remove connector by pressing release at top and pull off connector, then rotate switch as if to unscrew out; only 1/3 turn required, ingenious). Replacing - push new switch in hole (de-rotated 1/3 turn) till fully depressed like Cruise control switch mounted next to and then rotate 1/3 turn into position rotating as if to screw in.

Didn't fix problem.

Investigated further and discovered that when the shifter wouldn't come out of park there was actually still 12 volts present across the red and blue wires of the solenoid connector (unplugged from solenoid) whenever all conditions for solenoid actuation were present (Ign on, brake depressed, in Park). Plugging back in to solenoid with 12volts still present didn't cause solenoid to actuate.

Suspected solenoid (as you would at this stage).

Left it over Easter then today on a whim booked it in with Nissan for next week.

Whilst chatting to the desk guy a technician walked by and we chatted about the problem. Told him all the above. He said they have fixed lots and its usually an Earthing problem (of all things).

The two wires to the solenoid are red and blue. The blue one goes to earth and most times if another wire is soldered to it (the blue one) at the solenoid connector end and then earthed at the metal frame at the front of the transmission cover the problem is fixed.

The question is why does it fault after a few years (my T31 is 3-1/4 yrs old) and why does the earth connection fault???

Otherwise the solenoid just clips out of the selector mechanism and a new one clips in.

Not sure if I should run the earth wire myself or let them pull it all (shifter cover, transmission console etc etc!!!!) to bits to do it and maybe fit a new solenoid if necessary.


Last edited by jalalski, 5/May/2011, 7:07 pm


---
2007 X-Trail T31 ST-L

Xy going vertical at Bendleby Station . . .

28/Apr/2011, 11:32 pm Link to this post Send Email PM   Send Private Message
 
RichTNorway Profile
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Date Registered: 04-2011
TOTAL POSTS: 17
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Re: CVT Transmission Locking


Hi,

Which was does the solenoid work?, i.e. does it need 12v to activate and lock the transmission, or is it the other way round? Since if it was a bad earth the circuit would not be complete and thus the solenoid would not activate. But perhaps the earth is there but has a high resistance, in which case you should see some sort of voltage drop on the solenoid connector. But I would expect you to hear the solenoid activate when it has 12v, i.e. pull the connector off when you know it has 12v, then it should thunk.

Do you know if the switch on the brake pedal directory controls the solenoid, or is the switch connected to the ecu/tcm then the ecu/tcm sends the signal out to activate/deactivate the solenoid

Rich
29/Apr/2011, 2:30 am Link to this post Send Email PM   Send Private Message Blog
 
Translucidus Profile
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Date Registered: 05-2010
Location: Adelaide
TOTAL POSTS: 599
Reply | QUOTE
Re: CVT Transmission Locking


Hi RTN

12 Volts actuates the solenoid temporarily, which actuates a mechanism that to allows the shift button to be pressed and THEN the shifter can be moved from Park.

With it all uncovered and the fault is happening, there is 12 Volts across the disconnected solenoid connector. When reinserting the connector the solenoid doesn't operate.

It is VERY hard to measure the voltage across the solenoid when the connector is plugged in. If you take off the selector cover (the large oval plastic cover that has the cigarette lighter etc, and the shifter in the middle of) off you can see why.

According to the circuit diagram there is no ecu in the circuit - just the switches and solenoid in series.

I'm wondering why the earth could be faulty or have developed a high resistance as would seem a possibility. I would rater fix that (or have it fixed) than add another set of problems (a solder joint that may eventually corrode away the blue wire over the next 15 years).

The Nissan service manual is not the easiest manual to use - ie WHERE IS THE EARTH POINT M76???

Looking at the circuit diagram it is obvious that by earthing the blue wire at the solenoid, the Park Position Switch is BYPASSED - not an honorable fix, because the solenoid would then operate every time the brake is pressed!!!

---
2007 X-Trail T31 ST-L

Xy going vertical at Bendleby Station . . .

29/Apr/2011, 12:30 pm Link to this post Send Email PM   Send Private Message
 
Translucidus Profile
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Date Registered: 05-2010
Location: Adelaide
TOTAL POSTS: 599
Reply | QUOTE
Re: CVT Transmission Locking


Discovered the Earth Point M76 - its location in the Service manual shows it at the top of the drivers dash somewhere.

Doesn't matter because I don't believe my (or anyone else's) problem is earthing.

Running an earth wire to the Solenoid connector blue wire does actually bypass the Park Position Switch (PPS) !!!!! a terrible solution - every time the brake is pressed the solenoid clunks !!! (ie even when driving along)

When the fault was present just now I earthed the blue wire and the solenoid operated fine suggesting the problem is actually in the PPS or (unlikely because other functions rely on it) the earth point M76.

Glad I didn't go ahead with the fix suggested by the Nissan Dealer.

I think when I take it in I will request either a new Shifter assembly or a new Park Position Switch or Solenoid.

---
2007 X-Trail T31 ST-L

Xy going vertical at Bendleby Station . . .

29/Apr/2011, 5:09 pm Link to this post Send Email PM   Send Private Message
 


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