Aircon code 15 - refrigerant temp sensor

#1 03-26-2005, 10:34 AM

My aircon isn't working well - it's not really pumping out any cold air - there is clearly something wrong. The self-diagnosis comes up with a code 15 suggesting something is wrong with the refrigerant temperature sensor circuit. For further dignosis the books suggest checking the sensor's 2-pin connector which is allegedly below the blower motor unit. I have taken the glove box out so I can see the blower, but I cannot identify the 2-pin connector or the sensor. Can anyone give me any clues?

Dave

1992 JDM import

Electrophil · #2 03-26-2005, 11:00 AM

The service manual says it is on connector BM2, lead numbers 11 and 13. I'm looking up which connector is BM2 now.

Says:
1: Remove glove box
2: Disconnect Connector (BM2)
3: Turn ignition to "ON"
4: Measure resistance using the table below.
"Table below" is a non-linear graph, that at a temp of 77degrees fahrenheit shows about 2.2Kohm.
68 degrees is about 2.67kohm, and 86 degress is about 1.83kohm.

I'm looking up where BM2 is, but it looks like it's in the wiring section manual.

Electrophil · #3 03-26-2005, 11:39 AM

OK... This is confusing.

The refrigerant temperature sensor is a 2 pin device that plugs into a 2 pin connector (BM3). It appears you can't get to that from where you are. But... If you can see the two connectors, both 2 pins each on top and to the left of the blower unit, it is the 2 pin connector to the right of the two connectors. The wires are Green/white and Brown/white.

But (BM3) splices into a larger connector (BM2). And that's where they said to disconnect and measure from. It is a 14 pin connector. The numbering and color code as follows:

|Tab|
|8 |7 |6 | 5 |4 | 3 |2 |1 |
|14|13 |XX|12 |11|XX|10|9 |

L=Blue, B=Black, Lg=Light green, G=Green, and Gr=Grey. The rest are self explanatory.

1-W 2-G 3-Y 4-LW 5-LgR 6-Br 7-L 8-BR 9-Lg 10-WR 11-GW 12-YR 13-BrW 14-NC

Best I can do. Hopefully someone smarter than me... which is everyone else, will come along and clarify.

Electrophil · #4 03-26-2005, 11:40 AM

That "|tab|" up above should be located in the middle... obviously.

Electrophil · #5 03-26-2005, 11:43 AM

Actually, my connector came out all goofed up once it was posted.

Envision pins 1 and 8 are in line and directly above pins 9 and 14 respectively.

Geez!!

Electrophil · #6 03-26-2005, 11:45 AM

The slots with the "XX" are indentions, there is nothing there at all on the connector. no wires, and no slots there to put wires.

I'll shut up now.

Earthworm · #7 03-28-2005, 03:51 PM

Quote:

Originally Posted by Electrophil

|Tab|
|8 |7 |6 | 5 |4 | 3 |2 |1 |
|14|13 |XX|12 |11|XX|10|9 |

As a reminder when posting something and spacing is important you can use the Code feature in the forums (the # button)

Code:

              |Tab|
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
|14 |13 |XX |12 |11 |XX |10 | 9 |

Another hint is to use notepad to line up everything first then copy and paste it between the code tags.