Thanks!

 

coolant temp.... but it tells ur fan when to come on and works ur gauge, not the ecu how warm it is that one is in the side of the head.

 

does a OBD-0 B16 have one there...?

 

not to thread jack but what's the green plug above that? mines not hooked up and fan doesnt come on but that black plug is plugged in

 

the green one is the knock

 

I found this...i thought I should add it..

 

The one circled in the original post is the fan switch...found on OBD0 blocks. One with the green connector is knock as mentioned.

 

the green one is the knock sensor, the black one is the radiator fan switch (the early blocks have on the back where yours is the newer ones have on the thermostat outlet housing) theres also another one that is next to the fan switch in the back of the block, thats the oil temp sensor, when you have overheating problems this is the sensor that makes the condensor and the radiator fan come on whe you tur the car off. hope that helps!!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic46 &raquo;</TD></TR><TR><TD CLASS="quote">coolant temp.... but it tells ur fan when to come on and works ur gauge, not the ecu how warm it is that one is in the side of the head.</TD></TR></TABLE>

Not to be a smart a** but the sensor on the back of the block is only for the fans, the temp sensor for the temp guage is located on the side of the head near the dizzy...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by allhonda &raquo;</TD></TR><TR><TD CLASS="quote"> theres also another one that is next to the fan switch in the back of the block, thats the oil temp sensor, when you have overheating problems this is the sensor that makes the condensor and the radiator fan come on whe you tur the car off. hope that helps!!!!</TD></TR></TABLE>

Wrong... Thats just the oil pressure switch for the dummy light on the cluster.

 

Yeah I'm pretty sure that is the oil pressure sending unit!

 

not wrong, thers also another sensor with 2 wires, not the pressure switch wich has only one wire ( yellow/red wire ). hey i feed my family by working on hondas and doing all kinds of swaps, your wrong!!!!!

 

I'm gonna have to agree with 4thgen... \
OBD0 blocks have the Rad fan switch in the back of the block, (2 wire sensor)
OBD1 blocks have it in the T-stat housing (as shown in the pic)
the single wire plug, is in fact the Oil press. sending unit. turns the dash light on and off. thats it. So you are wrong. Unless your talking about something nobody else see's in the pic...

 

sorry again, but yeah i have a b18a and someone said they dont have knock sensors. but i have those two exact plugs, green one unplugged cause the plug wont fit and the black one is plugged in but fan doesnt turn on, changed temp sensor and thermo? any ideas?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RexQ &raquo;</TD></TR><TR><TD CLASS="quote">sorry again, but yeah i have a b18a and someone said they dont have knock sensors. but i have those two exact plugs, green one unplugged cause the plug wont fit and the black one is plugged in but fan doesnt turn on, changed temp sensor and thermo? any ideas?
</TD></TR></TABLE>

Take the 2 wires going to the fan switch and short them your fan should come on if not check your wiring around the fan and relay...

 

thanks guys, still nothing guess ill figure something out

also does anyone know what that sensor is on the back of the blcok, the green plug, on a b18a obd-0? thanks