mcx apex

[whitee]

Ok I was changing out the battery on my Mcx apex and noticed a hose dangling as your on the sled on the right side of the intercooler there is what looks like a regulator built into the intercooler, the hose on the top of this isnt going to anything is it supposed to be or is it a vent???? I would take a picture but its -15F and snowing hard

 

[Sammy]

The regulator as you are calling it is a blow off valve, there should be two hoses running to it. One is a vacuum source to operate the blow off valve itself and the other one is a boost line that runs to the atmospheric pressure sensor which is located to the left of your battery. The line that goes to one of three fasteners of the blow off valve is your boost line to the atmospheric pressure sensor. The fastener looks like a grease zerk, but is actually an orficed fitting. If you are experiencing a rough idle then more than likely the vacuum hose is the one that has fallen off. If the boost line has fallen off of the atmospheric pressure sensor then the engine will run lean during part throttle operation. If you have an a/f guage you will see it run anywhere from 14.0 to 17.0. The line has a tendency to fall off at the atmospheric pressure sensor end as the sensor has a tapered end to it. Zip ties on all these lines are a good idea.

 

[whitee]

THANK YOU very much it is running a little lean and idling fast I will try to find that pressure sensor in the morning before I go out again the hose that is off does go down to the front of the belly pan thanks alot I am in Cooke city with limited internet and no phone

 

[Sammy]

This sensor is hard to find if you are not sure what you are looking for. I have attached a picture that shows the sensor. In this picture, my voltage regulator and mcx ecu have been relocated to the inside of the delta frame. The mcx box has a hose running to it (this is the boost line for the map sensor), just to the left of where the hose attaches to the mcx box you can see the atmospheric pressure sensor. The sensor is black and has the blue and white label on it, you can see it mounts to the bronze colored mount below the mcx box. The atmospheric sensor has a tapered plastic fitting on the bottom of it approx. 1" long. This is where the boost line from your intercooler should attach. Hope this helps.

 

[whitee]

Thanks alot Sammy found it this mornin got it hooked up

 

[magicg60]

code #25

Dose anyone know what this code #25 is for ?

 

[philsummers21]

You sure its code 25? Can't seem to find that one or even heard of it.

 

[johnny be bad]

Yamaha Error Codes for Apex, Attak, and Apex Mountain models


Code #
Item
Symptom
Fail-Safe Action Starting Capability Running Capability
11 Cylinder identification sensor No normal signals are received from the cylinder identification sensor Continues to operate the engine based on the results of the cylinder identification that existed up to that point Unable Able
12 Crankshaft position sensor No normal signals are received from the crankshaft position sensor Stops the engine (by stopping the injection and ignition) Unable Unable
13
14 Intake air pressure sensor (open or short circuit) (pipe system) Intake air pressure sensor-open or short circuit detected.
Faulty intake air pressure sensor system Fixes the intake air pressure to 85.0 kPa. Able Able
15
16 Throttle position sensor (open or short circuit) (stuck) Throttle position sensor-open or short circuit detected Fixes the throttle position sensor to fully open Able Able
20 Intake air pressure
Atmospheric pressure Defective values are detected due to the internal malfunction Fixes the intake air pressure and atmospheric pressure to 85.0 kPa. Able Able
21 Coolant temperature sensor Coolant temperature sensor-open or short circuit detected Fixes the coolant temperature to 600 C. After the engine starts, the radiator fan relay will be turned on. Able Able
22 Intake temperature sensor Intake temperature sensor-open or short circuit detected Fixes the intake temperature to 00 C. Able Able
23 Atmospheric pressure sensor (open or short circuit) Atmospheric pressure sensor-open or short circuit detected Fixes the atmospheric pressure to 85.0 kPa. Able Able
30 Oil pressure dropped Engine stops when the oil pressure drop is detected Fuel pump and fuel injection are stopped (main relay is off) Unable Unable
33
34
35
36 Faulty ignition Open circuit detected in the primary lead of the ignition coil Cut the injection of cylinder in the same group with the cylinder that the error is detected. Example, when the #1 cylinder is defective, cut the injection of #1 and #4 cylinders. Turn on the power to the air induction solenoid to always cut-off the aire Able (depending on the number of faulty cylinders) Able (depending on the number of faulty cylinders)
42 Speed sensor No normal signals are received from the speed sensor Assumes highest ratio Able Able
43 Fuel system voltage (monitor voltage) The ECU is unable to monitor the battery voltage (an open circuit in the line to the ECU) Fixes the battery voltage to 12 V Able Able
44 Error in writing the amount of CO adjustment on the EEPROM An error is detected while reading or writing on the EEPROM (CO adjustment value) n/a Able Able
46 Vehicle system power supply (monitor voltage) Power supply to the FI system is not normal Grip warmer output is off Able Able
50 ECU internal malfunction (memory check error) Faulty ECU memory. When this malfunction is detected, the code number might not appear on the meter n/a Unable Unable
80 Grip warmer switch Grip warmer switch-short circuit detected n/a Able Able
81 Grip warmer Grip warmer-open or short circuit detected n/a Able Able
82 Thumb warmer switch Thumb warmer switch-short circuit detected n/a Able Able
83 Thumb warmer Thumb warmer-short circuit detected n/a Able Able
84 T.O.R.S. Detecting conditions for T.O.R.S. are satisfied n/a Able Unable
85 Oil pressure switch Oil pressure switch-open circuit detected n/a Able Able
- Start unable warning Relay is not turned ON even if the crank signal is input while the start switch is turned ON. When the start switch is turned ON while an error is detected with the fault code of number 11, 12, 30, or 50. Engine trouble warning light flashes when the start switch is turned on Unable Unable