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Code 14 & 15 A/C diagnostic codes
I'd like some input from the board on these two error codes for the HVAC system. I can replace both sensors but before I do, I wanted to make sure that I'm not missing anything.
Code 14 - Evaporator sensor open Code 15 - Refrigerant temp sensor open FSM states to conduct a resistance value check for both sensors. After testing them, they both fell in line with the value from the table. I find it peculiar that BOTH sensors are reporting an open circuit condition at the same time. This points to a connector not making good contact that is common to both. I'll keep poking around but so far haven't found anything concrete. Purchasing these two sensors are rather expensive so I have to make absolutely sure that they're both bad before ordering. $140 for one and $50 for the other. The A/C system does work decent when it works. However, it refused to turn on for my ride home from work, around 90°F. But, it worked earlier in the day during my lunch hour, 40°F vent temp Go figure. When operating normally, the high and low side pressures are appropriate for the ambient temps. This is what happened yesterday: - get in the hot car, turn on engine - push AUTO on the HVAC - system takes a while, maybe 30 seconds before turning on full blast for five seconds. - system shuts off - while I'm driving, I do feel faint cold air coming out of the vents but I don't think the blower was running - shut off system, back to AUTO several times yielded nothing. System converted to r134A - new condenser - new expansion valve - new drier - new a/c comp Thanks for any insight.
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If it ain't broken it, doesn't have enough features!!! '92 SVX LSL '03 4Runner '96 FZJ80 Landcruiser '90 Mercedes 300E |
#2
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Re: Code 14 & 15 A/C diagnostic codes
Did I send you the AC manual?
See attachement for relevant connectors. Ground fault? Borrow an other control unit and try that.... ? Tapani Last edited by Tapani; 05-18-2012 at 08:32 AM. |
#3
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Re: Code 14 & 15 A/C diagnostic codes
That is an excellent picture, thanks. I saved it.
I checked the continuity between 13 & 12 and what do you know, the resistance value is not within spec. In fact, the test revealed an open circuit So, at least I have a defective sensor so it'll have to be replaced I'm thinking. Sucks that I have to deplete the system of R134a but oh well. But, just to be sure, I'll try the control unit next to see what's up. This is a second control unit so I'm hoping it is not failing but it's easy enough to test it out. Thanks.
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If it ain't broken it, doesn't have enough features!!! '92 SVX LSL '03 4Runner '96 FZJ80 Landcruiser '90 Mercedes 300E |
#4
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Re: Code 14 & 15 A/C diagnostic codes
I think I e-mailed the whole AC section a while ago :-)
T |
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