help. my ac compresor dont work. probabli the ecu have problems

[hertex]

sorri y dont spek english veri well. my car is sentra b14 assembled in mexico. The last week I appeara fault in the system of the conditioned air the compressor does notignite but the ventilators yes if the unic problem that it does not ignite is the valve of minimo and the compressor. that work with rele this rele whenreviewing observe it that him this arriving the negative signal andaccording to the manuals from this car come from the computermake a test bypassing the terminals of rele . and compresory valbulaignited. it wanted to know if to the problem this in the computer oray other system that controls it

[AZhitman]

Pon tu preguntas en Espanol, y nosotros traduzcar para ti.

Llamados al NICO!

[Nismo_Freak]

sorri y dont spek english veri well. my car is sentra b14 assembled in mexico. The last week I appeara fault in the system of the conditioned air the compressor does notignite but the ventilators yes if the unic problem that it does not ignite is the valve of minimo and the compressor. that work with rele this rele whenreviewing observe it that him this arriving the negative signal andaccording to the manuals from this car come from the computermake a test bypassing the terminals of rele . and compresory valbulaignited. it wanted to know if to the problem this in the computer oray other system that controls it

For Search Reasoning:

He has an A/C issue in his Mexican spec Sentra B14 (aka Tsuru). The A/C compressor clutch does not engage, but when he jumped the relay it worked correctly (as per his manual). He is wanting to know if the problem is the computer control or if it is in the relay itself or another aspect that controls it.

Response (Greg mind translating this for his ease?):

The A/C is controlled via the climate control by the user, the signal then goes to the ECU (for idle correction, etc.) then to the A/C relay. The relay will then complete the circuit when engaged and will send power to the A/C compressor clutch. The A/C compressor clutch then locks and spins the compressor.

However when you jumped the relay you basically skipped the electronic control (ie. the ECU, and Climate Control) which allowed it to come on. Since it worked when you jumped the relay I am 100% certain you have a problem with either your climate control or the ECU. I would first try replacing the climate control unit as they are cheap to find used. If that doesn't work then I would look into the ECU.

If you want to try to diagnose the problem... turn the climate control on with the A/C button engaged. Test the signal wire for voltage. If no voltage is present then you have a malfunctioning climate control unit. If voltage is present and the A/C is not coming on then you have an issue with the ECU or the A/C relay itself.

[hertex]

sorri y dont spek english veri well. my car is sentra b14 assembled in mexico. The last week I appeara fault in the system of the conditioned air the compressor does notignite but the ventilators yes if the unic problem that it does not ignite is the valve of minimo and the compressor. that work with rele this rele whenreviewing observe it that him this arriving the negative signal andaccording to the manuals from this car come from the computermake a test bypassing the terminals of rele . and compresory valbulaignited. it wanted to know if to the problem this in the computer oray other system that controls it

BUENO LO QUE LES DECIA ES QUE MI VEHICULO UN SENTRA MODELO B14 FABRICADO EN MEXICO RECIENTEMENTE ME PRESENTO UNA FALLA EL COMPRESOR DEL AIRE NO ENCIENDE EL RESTO DE LOS SISTEMAS FUNCIONAN SOLO EL AIRE, CUANDO REVISE EL RELE DEL COMPRESOR ME FIJE QUE TIENE SEÑAL POSITIVA PERO LA NEGATIVA LA CUAL VIENE DE LA ECU NO ESTA PRESENTE. ME IMAGINE QUE ES LA COMPUTADORA POR LA CUAL LA DESARME A VER SI OBSERVAVA ALGO EXTRAÑO EN ELLA PERO NO LOGRE VER NADA DEFECTUOSO. CUANDO REALICE UN PUENTE EN EL RELE OBVIAMENTE ENCENDIO EL COMPRESOR Y LA VALBULA PERO NO HAY CONTROL. NO SE SI ALGUNA VES AN TENIDO LA OPORTUNIDAD DE VER ESTE VEHICULO MODELO MEXICANO EL CUAL EL SISTEMA ELECTRONICO ES ALGO DISTINTO YA QUE NO TIENE SENSORES DE OXIGENO, SENSOR DE TEMPERATURA DE ENTRADA DE AIRE, SENSOR DE POSISION DEL CIGUEÑAL ETC ES MENOS COMPLETO PERO ALGO MAS SENCILLO A MI PARECRER BUENO AGRADECERIA CUALQUIER INFORMACION SOBRE ESTA FALLA DEL AIRE Y SI PUEDEN ENVIARME MEDIDAS DE VOLTAGE DE REFERENCIA PARA PROBAR LOS SISTEMAS GRACIAS

[s13sr20chris]

i will post in both threads then as i am not sure which will be read.

if you jump the relay and the a/c works...ok, thats a good sign. the next thing to check is the a/c amplifier. this is the little thing inside the evaporator case that has 3 wires. it is a fairly simple transistor to control a/c operation but i am not sure of the wire colors on a tsuru. i do know this, if you jump the wrong two wires it will pop the a/c control head. 99% of the a/c failures i see where the refrigeration system works and the control system does not are a/c amplifier problems. of course it could also be the relay. all relays with the same pinout on the bottom and the same color are interchangable.

please, if someone could translate this for me

[navysnail]

i think greg said somthing along those lines of translation, not sure though

[hertex]

If, already the a/c to amplifier jump even places a analogicothermostat and nothing to him also I did jump to him to dual presureswith and follows without working is by which I think that is the computer

[hertex]

my car is a sentra b14 (mexican model) not if an seen the mexican model this car dont have O2 sensor, IAT, egr sensor aside from others. I entered the test of errors of the computer and it does not show errors in any system I do not know if the computer shows errors with respect to the system of the conditioned air

[crzycav86]

If you need to translate something, try using this online translator: http://babelfish.altavista.com/

The problem is that you have to spell everything correctly, and use proper grammar, or else it won't translate correctly. It helps to use the most simple sentences as possible.

[crzycav86]

I tried to fix up and translate what s13sr20chris wrote using the altavista translator...

s13sr20chris en espanol:Si usted salta el relais y los trabajos del aire acondicionado que es una buena cosa. La cosa siguiente a comprobar es el amplificador del aire acondicionado. Ésta es la pequeña cosa dentro de la caja del evaporador que tiene tres alambres. Es un transistor bastante simple para controlar la operación del aire acondicionado pero no soy wires' seguro; colores en un tsuru. sé esto: si usted salta los dos alambres incorrectos hará estallar el jefe del control del aire acondicionado. el 99% de las faltas del aire acondicionado que veo es cuando el sistema de refrigeración trabaja y no lo hace el sistema de control él es problemas del amplificador del aire acondicionado. por supuesto, podría también ser el relais todos los relais con el mismo pinout en el fondo y el mismo color es interchangable.