Patrol Idle RPM

Submitted: Friday, Jan 10, 2003 at 16:17

ThreadID: 2894 Views:1788 Replies:3 FollowUps:9

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Member - Paul

Have a general question.

My Patrol 2000 DX 3.0L idles smoothly at 750RPM

When I turn the lights on (High Beam with driving lights)
Air Con, cigerette lighter, hazards.......the RPM increase to about 850RPM (Air Con seems to cause the jump)

When I turn off all the accessories, drops back to 750, but when I turn on the Rear Demister the idle RMP jumps up to 1100-1200.

When I engage the clutch and select ANY gear the idle spped drops back to 750.

Can other Patrol users confirm this is normal operation?

In-laws have a 3.6 Petrol Prado and it does not behave this way.

Can I assmue this is standard Deisel behavour?

Thanks

Paul

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Reply By: bruce.h - Friday, Jan 10, 2003 at 17:27

Friday, Jan 10, 2003 at 17:27

Gday paul
most cars with aircon will up the revs to compesate for the extra load of air con pump dont know about it going up with other accessories but doesnt sound like to much to worry about just be aware when 4wding that this will happen can get you into trouble when tackling obsticals or hill decents if revs jump unexpectedly so when i difficult terain turn off your air con
regards Bruce

AnswerID: 11009

Follow Up By: Member - Paul - Friday, Jan 10, 2003 at 19:15

Friday, Jan 10, 2003 at 19:15

Bruce,

thanks.....I too would expect the air con to up the revs slightly as the compressor is driven via the drive belt, the fans are the only electrical component ........but surely the rear demister (by itself) cannot be casuing more load than the Air con and all other accessories ????

Paul

FollowupID: 5983

Follow Up By: Bruce.H - Friday, Jan 10, 2003 at 19:34

Friday, Jan 10, 2003 at 19:34

im not to familiar with new cars as to how its done but no doutit will be controled via the computer, dosnt sound to me to be to much to be worried over as it not a huge jump in revs but might be worth a mention on the next service at toyota. to me i would see no reason for the revs to go up for the other accessories either but hell im no mechanic just the nut behind the wheel they became to complicated to work on after about 1980 any way .
best of luck
Bruce

FollowupID: 5988

Follow Up By: Paul - Friday, Jan 10, 2003 at 19:47

Friday, Jan 10, 2003 at 19:47

not sure if Toyota would be wanting to help me out.......its a Nissan

hehehe!!!!!

FollowupID: 5992

Follow Up By: Bruce.H - Friday, Jan 10, 2003 at 20:23

Friday, Jan 10, 2003 at 20:23

oops dam must learn to read then again you might get a better respons from toyota

FollowupID: 5997

Reply By: Truckster - Friday, Jan 10, 2003 at 21:10

Friday, Jan 10, 2003 at 21:10

When I turn the lights on (High Beam with driving lights)
Air Con, cigerette lighter, hazards.......the RPM increase to about 850RPM (Air Con seems to cause the jump)

This sounds "press the clutch and all goes normal" sounds dodgey, as does the rear demister...

What does Nissan say? Nothign wrong? all within specs..?

When I hit the rear demister nothing happens but demisting! Same with ciggy lighter, and hazzards!...

something amiss... might be minor now, but you dont want it to die at the wrong place and time!!!

AnswerID: 11025

Reply By: max_rockatansky - Friday, Jan 10, 2003 at 21:31

Friday, Jan 10, 2003 at 21:31

are you sure you're not hitting the fast idle swicth also?

its on the rh sideof the steering wheel down low

this is for cold starts and lift the idle to 1100rpm, as soon as you touch the clutch or have it in any gear, it is disabled

max rockatansky

AnswerID: 11026

Follow Up By: Paul - Friday, Jan 10, 2003 at 21:55

Friday, Jan 10, 2003 at 21:55

And the winner is.........max_rockatansky.

That what it is..........Its a button with the word Heat on it....I just assumed it was the rear demister.

Didn't even think to look on the Left hand side of the dash and notice the BIGGER and real rear demister button below the harzards........

Its like looking for that bottle of beer in the fridge....you know it is there somewhere.....but its right there in front of your face.

If I had a owners guide it would of told me this and saved me the embarresment

Thanks
Paul

FollowupID: 6011

Follow Up By: Paul - Friday, Jan 10, 2003 at 21:57

Friday, Jan 10, 2003 at 21:57

YOU WANT TO KNOW WHAT NISSAN SERVICE DEPARTMENT TOLD ME !!!!!!!!

Normal operation for the rear demister to do this !!!!

I didn't believe them, thus the post

Paul

FollowupID: 6012