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lmdew

98 Legacy Outback no fans on AC and P0441

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A few years ago I put a 95 2.2 into a 98 Legacy Outback and it went to a friend in Seattle.

 

I helped him this weekend try to figure out the no fans on AC and P0441.

 

I put the car in D-Check and the main fan cycled.  The sub fan did not.  We plugged the sub fan into the main fan connector to make sure the fan was good and it did cycle on and off.  I know the 4 relays in the engine fuse box control the fans and AC.  The sub fan relay main/silver contacts have no voltage at the connector.

 

I could jump the AC Relay front one and the main fan would come on.  Jumping the sub fan did not power it up.  The AC compressor does work, just no fans.  The Compressor clutch cycles on and off as it should when we have the AC on.

 

I checked the Evap connector at the rear of the car for voltage, I had 0 volts.  I'm not sure it was a good reading as the ECU provides the ground, so both leads in the connector would show 0 volts if the ground was open.  I did try pin to a bolt but I'm not positive it was a good ground.  

 

The schematic show power to the connector when the key is on and the ECU controls the ground.  They were just chilton manuals so it may be in error.  

 

Any help would be appreciated.

 

Any good USMB Members in the Seattle area with a shop?

 

Thanks

Larry

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The car Larry's talking about is my son, Eric's.  We flew to Colorado and had a wonderful two day drive back to Seattle--including being snowed-in for a night in western Wyoming! 

 

Thanks for all the input, friends.  GD--he definitely wants to get the car to your shop.  I'll PM you about scheduling and details.

 

Mahalo & Aloha,

Nick

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As a follow-up, yesterday GD worked on the car ('98 Outback with a '95 EJ22 swapped in).  He sent me the following:

 

 

The EVAP purge flow (P0441) was due to a small vacuum routing error on the 2.2 swap. Both sides of the purge solenoid were connected to manifold vacuum so it was "purging" all the time. 

 

The (very strange) P1502 "fan control circuit high" code was due to a failed engine computer. Funny how the computer fails internally and triggers a code pointing the finger at the "circuit" when in fact the computer itself was at fault. Took me all morning to trace that down. First time I've seen that circuit die. I had a used ECU of the same part number in my collection and the sub fan is working normally now.

 

I cannot find a cause for the random P0303 and P0302 (neither were present when the car arrived). It runs ever so slightly rough at idle despite having 195 to 200 psi compression on all 4. I checked valve timing, checked for fuel pressure and drop off (injector leakage), and did a smoke test for vacuum leaks. I cannot determine a cause for the slight roughness but it is probably the cause of the random cylinder 2 and 3 misfires. I suspect there is an imbalance situation between the flywheel and pressure plate, etc. Pressure plate may need to be clocked differently on the flywheel. There doesnt seem to be any other directions to go with the diagnostics for those codes besides throwing a crank sensor at it, or doing a clutch and tossing in a known good flywheel. Being the codes did not present on his drive down to me I suspect he will go through the WA state emissions test without much problem. It is also possible that the failed ECU was responsible though I doubt it. 

 

Rick

 

 

A Big Mahalo to GD and Larry Dew for all their efforts.  Aloha!

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Thanks for the update.

May be I should go work for GD in my retirement from the airlines.  Nov 3rd is right around the corner.

 

Larry

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The P0441 came back. I am having him re-route the line from the firewall directly to the purge solenoid. I seem to remember many years ago having one that didn't like the flow rate of all the hard lines looped together and such. I am hoping that a silicone line from firewall directly to purge solenoid will take care of it. With that code you have to wait and see if the ECU complains. I'm fairly certain it uses the manifold pressure sensor to determine if the system is flowing and if there's not enough of a change it assumes there's a flow problem. Sadly the ECU is not very descriptive and there is no diagnostic information on code activation criterion...... 

 

GD

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That may be why I did not have the code at 6200' here in Colorado Springs but Eric has it at Sea Level out in Seattle.  

I told you Nick the Subaru just likes Colorado!

 

Thanks for all the work GD!

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