2G 1999 ecu emissions

[azkkr]

just finished the ECU Swapt. I used a 1999 GST. Now The code reader only have 4 incompleted tests. Before it has 5. (Catalyst, Evaporative system, Oxygen sensor, Oxygen sensor heater, and EGR system- NOT Completed). with the new ECU,the O2 Sensor Heater is completed.

Do I need to do something to make the others get completed as well?

P0446 CEL - EVAP Emissions control system vent control circuit malfunction.

 

[Justins99GSX]

You need to drive the car around in order to get the systems to pass....

 

[azkkr]

You need to drive the car around in order to get the systems to pass....

thatswhat I thought, How many miles do you think is enough?

 

[toojung2die]

To get the readiness monitors to complete requires at least two drive cycles, turning off the engine between drives. The first time the drive cycles for all the monitors is successfully completed the readiness monitors remain incomplete. The second time the the drive cycle is executed is when the monitors set to complete. Because you have at least one monitor completed you only have to accomplish the drive cycles for the incomplete monitors one more time. You can use these drive cycles to set the remaining monitors:
http://www.dsmtuners.com/forums/showthread.php?t=173569

 

[MelloEclipse]

good luck with that...my RS has a problem like that...but doing drive cycles will not fix it. yay for DSMs

 

[azkkr]

To get the readiness monitors to complete requires at least two drive cycles, turning off the engine between drives. The first time the drive cycles for all the monitors is successfully completed the readiness monitors remain incomplete. The second time the the drive cycle is executed is when the monitors set to complete. Because you have at least one monitor completed you only have to accomplish the drive cycles for the incomplete monitors one more time. You can use these drive cycles to set the remaining monitors:
http://www.dsmtuners.com/forums/showthread.php?t=173569

my new ECU is from a 1999 gst. All monitors are ready now except for the EVAP. But I have code P0446 showuing up. This is avoiding the EVAT monitor to be ready.

I notice a leak in the vaccum line attached to the BOV. Do you think this can be part of the problem with the P0446 code?

 

[toojung2die]

I notice a leak in the vaccum line attached to the BOV. Do you think this can be part of the problem with the P0446 code?

Probably not. This from the service manual for P0446:
Solenoid coil surge voltage (system voltage +2V) is not detected when the Evaporative
emission vent solenoid is turned on/off.

Your problem is most likely electrical. I'm puzzled about the +2V value but that's what it says...

 

[azkkr]

P0446 CEL - EVAP Emissions control system vent control circuit malfunction.


the vaccum line between the canister and the intake is bend in two places. can this be the problem>>>>>?

 

[toojung2die]

Those kinks in the line could be a problem but it's not what is causing the DTC code you're seeing. The ECU is grounding the solenoid and expecting to see system voltage at the connection to the ECU. This is not happening so the ECU is reporting that the solenoid circuit is bad. It could be a bad solenoid or a break in the circuit.

 

[azkkr]

I found this in a OBD2,100 pages long, document

There are four tests which are performed during a typical EVAP monitor. A DTC is assigned to each test.


3. Excess Vacuum Test (P0446)
This test checks for vent path restrictions. With the vent
solenoid open and purge commanded, the PCM should not
see excessive vacuum in the EVAP system. Typical evap
system vacuum with the vent solenoid open is about 5 to 6 in H2O.

This portion of the EVAP monitor is called the Excess
Vacuum test. When the PCM opens the vent solenoid, evap
system vacuum should decrease. If the vent solenoid were
restricted a code P0446 will set. A blocked/restricted vent
hose could also create a venting problem.

 

[toojung2die]

There are four tests which are performed during a typical EVAP monitor. A DTC is assigned to each test.
3. Excess Vacuum Test (P0446)

Sure won't hurt to verify the vent hose and solenoid are not restricted or clogged. But the information specific to our cars from Mitsu states that the P0446 is a circuit malfunction. Whenever I have a circuit malfunction DTC I always end up replacing the part indicated. Be sure to post your fix when you find it.

 

[azkkr]

Sure won't hurt to verify the vent hose and solenoid are not restricted or clogged. But the information specific to our cars from Mitsu states that the P0446 is a circuit malfunction. Whenever I have a circuit malfunction DTC I always end up replacing the part indicated. Be sure to post your fix when you find it.

now that i think about it, there is aticking noise coming from the fire all right behind the throttle body, can this be the solenoid???

 

[azkkr]

some people where asking where the EGR solenoid was>>

You must be logged in to view this image or video.

 

[plymubishi]

Most common EVAP problem I always run into is a bad gas cap but i think that it is code
P0440. OBD II is always great, yay drive-cycles....in any car

 

[toojung2die]

What kind of ECU are you using? The evap control system on the 2.0 liter turbo engine does not use a vent solenoid, it has a purge solenoid only. The evap control system on the 2.4 liter non-turbo uses both a purge solenoid and a vent solenoid. If you're using a turbo ECU it shouldn't be throwing a P0446 evap vent solenoid circuit failure because the turbo engine doesn't have a evap vent solenoid.
The first diagram is of the 2.4 liter evap system. The last image is the 2.0 liter turbo evap system.

 

[azkkr]

What kind of ECU are you using? The evap control system on the 2.0 liter turbo engine does not use a vent solenoid, it has a purge solenoid only. The evap control system on the 2.4 liter non-turbo uses both a purge solenoid and a vent solenoid. If you're using a turbo ECU it shouldn't be throwing a P0446 evap vent solenoid circuit failure because the turbo engine doesn't have a evap vent solenoid.
The first diagram is of the 2.4 liter evap system. The last image is the 2.0 liter turbo evap system.

1999 turbo ECU MD359403

 

[azkkr]

You must be logged in to view this image or video.

 

[toojung2die]

Something is not adding up here. It appears your ECU is throwing a P0446 evap vent solenoid circuit failure because your car doesn't have a vent solenoid. It doesn't make sense. A turbo ECU doesn't have this circuit so why would the ECU be checking for one? I tried to verify your ECU model# and my CAPS program shows 6 ECU's for the 1999 model year. It doesn't list MD359403. The closest I can find is MD359402 but all turbo ECU's begin with MD*. 2.4 liters begin with MR*. I'm stumped.

 

[azkkr]

Something is not adding up here. It appears your ECU is throwing a P0446 evap vent solenoid circuit failure because your car doesn't have a vent solenoid. It doesn't make sense. A turbo ECU doesn't have this circuit so why would the ECU be checking for one? I tried to verify your ECU model# and my CAPS program shows 6 ECU's for the 1999 model year. It doesn't list MD359403. The closest I can find is MD359402 but all turbo ECU's begin with MD*. 2.4 liters begin with MR*. I'm stumped.

Here is some references

http://simon.chi.il.us/ECU/ECUID.html

http://www.ecanfix.com/users/manualcd/gift/dsm/2g_turbo_vacuum_line_info.pdf

http://www.autozone.com/az/cds/en_us/0900823d/80/1c/c2/3a/0900823d801cc23a/repairInfoPages.htm

http://www.autozone.com/az/cds/en_us/0900823d/80/1c/c2/9e/0900823d801cc29e/repairInfoPages.htm

You must be logged in to view this image or video.

 

[azkkr]

if you look at the pic above, #7 is called the EVAC PURGE Solenoid. Once I erase the code P0446, this solenoid goes crazy making a "Ticking sound" Once the CEL comes up, the noise stops and the Code reads P0446.

 

[toojung2die]

Then I would conclude that the P0446 DTC is actually referring to the purge solenoid even though the manual calls it a vent solenoid circuit malfunction. Reset the CEL and monitor voltage at connector B-53 pin 9. That is the input from the purge solenoid.

 

[toojung2die]

I looked at your links. You should have more than enough information there to troubleshoot this problem. I rely on the backup manual CD.

 

[azkkr]

nevermind all this stuff. I ordered today the Purge solenoid, it costs ~ $46. i decided to remove the batery and take a look at the canister. Guess what? The PCV purge control valve of the canister was smash. The whole top ccame off. Might have happened when I swapt the tranny.

This PVC is controlled by the purge EVAP purge solenoid. That's the reason why the solenoid was clicking like crazy trying to open and close the valve.

Hopefully this will solve the problem. I will post pics and more info later.

 

[azkkr]

http://www.forparts.com/ICOBDIIdiagnostics4.05.htm

Since i was reading Code "P0446pd" I didn't understand what the Pd stood for. It means pending code. THis link explains!!

 

[azkkr]

Then I would conclude that the P0446 DTC is actually referring to the purge solenoid even though the manual calls it a vent solenoid circuit malfunction. Reset the CEL and monitor voltage at connector B-53 pin 9. That is the input from the purge solenoid.

how to do this?