Help with HVAC codes!
Instructor
Joined: Jan 2010
Posts: 240
Likes: 11
From: Plano Texas
Oldtimer
First 2 are history.
B0361 is Short to ground
B0363 is left actuator feedback open
If the DTC is a history or an intermittent. Try to perform the tests shown while "wiggling" wiring and connectors, this can often cause the malfunction to appear.
Visually inspect sensor connector and harness for damage, corrosion or water intrusion.
Check for adequate terminal tension, mis-routed harness, rubbed through wire insulation, and broken wire inside insulation.
B0441 is current. See attached pdf
Since you're getting all three, I'd say wiring harness or connector problem - short, loose connection, cut wire etc.
If not in wiring, you may have to have dealer (or repair shop) use a Tech II scan tool to diagnose.
B0361 is Short to ground
B0363 is left actuator feedback open
If the DTC is a history or an intermittent. Try to perform the tests shown while "wiggling" wiring and connectors, this can often cause the malfunction to appear.
Visually inspect sensor connector and harness for damage, corrosion or water intrusion.
Check for adequate terminal tension, mis-routed harness, rubbed through wire insulation, and broken wire inside insulation.
B0441 is current. See attached pdf
Since you're getting all three, I'd say wiring harness or connector problem - short, loose connection, cut wire etc.
If not in wiring, you may have to have dealer (or repair shop) use a Tech II scan tool to diagnose.
Last edited by PUMP03; Jun 10, 2012 at 01:16 AM.
Instructor
Joined: Jan 2010
Posts: 240
Likes: 11
From: Plano Texas
Oldtimer
If it's not wirring related, then it is either defective HVAC control unit or (more likely) the Left Actuator (this actuator controls the airflow Temperature). You'll have to follow steps outlined in the pdf to determine which one. Re-indexing the actuator is one of the fixes.
Last edited by PUMP03; Jun 12, 2012 at 09:48 PM.
Melting Slicks
Joined: Aug 2003
Posts: 2,786
Likes: 7
From: Iowa
If the wires look good, I'd go for the re-indexing/inspection for a broken gear in the HVAC actuator. Much mroe common problem than an HVAC controller going bad. Other than the dim display problem, I've never heard of one of those failing. But a broken gear in the actuator or a warped blend door (which can be fixed by indexing) is a much more common cause of HVAC problems.
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Thread Starter
Instructor
Joined: Aug 2009
Posts: 242
Likes: 0
From: Orlando Florida
Sorry for getting back so long but to end this thread on a good note, I reindex the actuator. First attempt it was blowing cold air but would get out of sync and start blowing warm air again so I figured I was close to the sweet spot. 2nd attempt was a success! It was blowing as cold the passenger side. Thanks for the help. The codes was still showing up but after a day or 2 it went away.