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Nissan Quest, Transmission, Van
#11 of 55 '99 Nissan Quest GXE rpm and shifting issues
Jan 29, 2007 (1:02 pm)
Howdy all of you,
I have a problem (maybe more than one) that I am trying to troubleshoot on my '99 Nissan Quest GXE (111 000 km/69,000 mi). The MIL is on.
The engine has begun abnormal harsh shifting during 1-2 and 2-3 upshift and 3-4 (overdrive) doesn't engage while driving at 70-80-100 kph (43-50-62 mph) and even more excessive speed. I fact shifting occurs at abnormal higher speed. 2 weeks ago, another problem occured. I was not able to drive because rpm was fluctuating between 2000 and 2200 with a speed limit of 20kph (12 mph) even if I step on the accelerator.
I borrowed a scantool and code scanned the vehicle and came up with the following fault codes:
P0105 - Manifold Absolute Pressure/Barometric Pressure Circuit
P0325 - Knock Sensor 1 Circuit Malfunction (Bank I)
P1605 - A/T Diagnostic Communication Line
P0446 - Evaporative Emission Control System Vent Control Circuit
P1400 - EGRC Solenoid Valve
P1705 - Throttle Position Sensor Circuit A/T
P1105 - MAP/BARO Pressure Switch Solenoid Valve
P1490 - Vacuum Cut Valve Bypass Valve (Circuit)
I started troubleshooting the Nissan Quest 1999 service manual borrowed from the dealer which I don't have anymore. I checked the absolute pressure sensor power supply.
1. Ignition switch "ON".
2. Voltage between terminal 3 and ground with tester is 0.4V (should be approximately 5V).
3. Detect malfunctionning harness connectors (looks OK).
4. Detect harness for open or short between ECM and absolute pressure sensor. Short (or continuity) exist between terminal 3 and ground.
My question are:
What can cause the harsh shifting problem? What should I troubleshoot first?
How do I locate the short between the sensor and the ECM?
Recently, another problem occured: the radiator fan is running continuously (meaning 100% of the time). I think it is related to the thermostat but I'm not sure and would realy appreciate any suggestions/answers any of you could give me.
I am on my own with this and am seeking some Nissan expertise to try and get my Quest back to running good. Thank you in advance for help you may be able to give.
#12 of 55 Re: '99 Nissan Quest GXE rpm and shifting issues [supernet]
by Stever@Edmunds HOST
Feb 02, 2007 (10:12 pm)
Hey Hugo, I'm not a tech but I have a manual for my '99. The shift is regulated entirely by electronic signals transmitted by the revolution sensor and throttle position sensor. Those signals control a couple of solenoid valves. There's a bunch of stuff to troubleshoot from there, but the throttle position sensor is often one of the first things on the list.
Check out the Online Repair Manuals links and see if you can access any of them. I didn't see any help at the AutoZone link but I've had good luck with the Auto Repair Reference Center. Maybe a library in your area subscribes to it.
You may want to check out the Transmission Traumas? and Cooling Systems: Problems & Solutions (Radiator, Fan, etc) discussions too, and hopefully someone knowledgeable will show up in here soon.
SUVs and Speed Shop
#13 of 55 reverse problem on mercury villager 94
Mar 20, 2007 (3:40 am)
hello, can someone help me out on my mercury villager 94 problem. my mechanic had to take down my transmission to replace a leaking freeze plug, so he drained the xmission fluid on the torque converter, then filled it up, when the everything is back in place, I had this reverse problem... evrytime I step on my gas and execeeding the RPM to 1300rpm the RPM/(tacho meter) goes up, even though the brake is already applied, the van will not stop coz' the RPM never drops, so I have to put it to nuetral to be able to brake. But reversing is ok when RPM is below 1300rpm, as long as you don't step on the gas to hard. And also if you are reversing in an inclined position with out stepping on the gas the RPM also goes up. Can someone please help me out. thanks...
#14 of 55 Here's a good one for you
Aug 17, 2007 (5:23 am)
99 Nissan Quest done a T-belt then customer comes back. Now speedo dont work. Replaced VSS. Still no luck. Any advice?
#15 of 55 Re: Here's a good one for you [lorddrago1]
Aug 17, 2007 (6:56 am)
Forgot to say tach dose not work either
#16 of 55 Poor Gas Mileage
Aug 24, 2007 (8:01 am)
Purchased 07 Quest S in May 07.
Checked mpg for trip only got 20 mpg at 65 mphr.
What can I do improve mileage or when does it get rated mpg?
#17 of 55 Re: Poor Gas Mileage [unclesonny]
Aug 24, 2007 (10:33 am)
How many miles do you have on the vehicle? How are you calculating the mpg? If it is anything other than total miles driven on the tank divided by gallons of gas pumped, then it is not accurate. The mpg computed by the computer is fairly close if you remember to reset it once you fill up. Otherwise it is giving you the average mpg since the last reset.
BTW, it took about 7k - 8k miles before I started seeing 24 mpg on the highway. Let's not discuss the city driving.
#18 of 55 Re: '99 Nissan Quest GXE rpm and shifting issues [supernet]
Aug 27, 2007 (5:59 pm)
Just curious. Was the problem described above ever resolved. I am having the same problem with my 2002 Nissan Quest. I have had the TPS sensor replaced and yet the problem still exist. However, I only get the harsh shifting went the engine has time to warm up. I thinking I might have a cold sauder on the EMC. Does everyone known where the EMC is located?
#19 of 55 05 Quest
Aug 27, 2007 (6:31 pm)
My Quest is experience shifting flare. when shifting in 2-3, the rpm spikes up by 100-300. It is a 4 speed and I have only put slightly over 10k miles on it. Has anyone experienced similar issue?
#20 of 55 Quest won't shift out of Park
Feb 06, 2008 (10:43 am)
I own a 2005 Quest that has until today had no transmission issues. This morning I was unable to shift out of park. I looked up the issue in the manual and was directed to use a screwdriver to depress the "shift lock" lever (accessible after removing a small plastic cover on the shift block). I did that and could then shift into drive, but apparently I will have to do this same thing everytime I try to shift out of park -- plus, the manual says the depressing the lever can also affect the brake lights. Has anyone had this problem? What did you do? thanks