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BryanPendleton · 01-26-2004, 09:20 AM

I have finished wiring up my 99 b16 with a 97 ex harness (motor not in car). I have all sensors and harness clips identified except one. The sensor is not on the engine itself, but the harness is located under the intake manifold. It a one-wire harness with blue/red color. I am looking for some input on this harness or rather the sensor it goes to.

http://www.autoserve.8m.com/OBD2ab1.html

According to this site, it the "ACS", but what is that.

Tim@Canspeed.com · 01-26-2004, 08:33 PM

According to that site the pinout is A27 which is the Engine Coolant Blower Motor Switch on OBDII.

However, I list that sensor as a Yel/Grn wire from sensor to ECU.

pissedoffsol · 01-27-2004, 07:36 AM

its for the A/c system. more commonly called the A/C Request Input. it raises/adjusts idle approprately when the a/c is kicked on.

BryanPendleton · 01-27-2004, 09:48 AM

I have determined that the sensor is the Knock Sensor, which mine was missing on the motor I purchased. . . .

Off to the salvage yard.

pissedoffsol · 01-27-2004, 10:03 AM

can't be.

97 ex's dont have a knock sensor.... why would it be part of the harness?

slick*vic* · 01-27-2004, 10:18 AM

the 97 ex does have a knock sensor.........

civicious · 01-27-2004, 04:57 PM

i've got that blue/red plug plugged into my knock sensor, theres nothin else back there that it would plug into...

course it dont matter cuz i have a p28 (p28 = no knock sensor)

i sure did think thta was the knock sensor thogh....

Tim@Canspeed.com · 01-31-2004, 02:21 AM

Knock sensor is red/blue.

The EX (our Canadian Si right?) uses a knock sensor.

01-26-2004, 08:33 PM	#2
Tim@Canspeed.com Member Join Date: Jan 2004 Posts: 70 iTrader: 0 / 0% Rep Power: 12	According to that site the pinout is A27 which is the Engine Coolant Blower Motor Switch on OBDII. However, I list that sensor as a Yel/Grn wire from sensor to ECU. __________________ Perfect Power Canada - National Distributor <a href=\'http://www.perfectpower.ca\' target=\'_blank\'>http://www.perfectpower.ca</a>

01-27-2004, 04:57 PM	#7
civicious FüK-VTEC Join Date: Jun 2003 Location: Houston, Texas Age: 23 Posts: 8,410 iTrader: 3 / 100% Ride: 07 Nissan Frontier, 90 CRX Si, 06 ZX6R racebike, chopped-out 02 Yamaha V-Star Rep Power: 189	i've got that blue/red plug plugged into my knock sensor, theres nothin else back there that it would plug into... course it dont matter cuz i have a p28 (p28 = no knock sensor) i sure did think thta was the knock sensor thogh.... __________________ CMRA #265 http://www.myspace.com/civicious AIM: greyfades

01-31-2004, 02:21 AM	#8
Tim@Canspeed.com Member Join Date: Jan 2004 Posts: 70 iTrader: 0 / 0% Rep Power: 12	Knock sensor is red/blue. The EX (our Canadian Si right?) uses a knock sensor. __________________ Perfect Power Canada - National Distributor <a href=\'http://www.perfectpower.ca\' target=\'_blank\'>http://www.perfectpower.ca</a>


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01-26-2004, 09:20 AM	#1
BryanPendleton Junior Member Join Date: Jan 2004 Posts: 9 iTrader: 0 / 0% Rep Power: 0	I have finished wiring up my 99 b16 with a 97 ex harness (motor not in car). I have all sensors and harness clips identified except one. The sensor is not on the engine itself, but the harness is located under the intake manifold. It a one-wire harness with blue/red color. I am looking for some input on this harness or rather the sensor it goes to. http://www.autoserve.8m.com/OBD2ab1.html According to this site, it the "ACS", but what is that.

01-27-2004, 07:36 AM	#3
pissedoffsol RETIRED Join Date: Sep 2002 Location: Retirement Home Age: 29 Posts: 49,951 iTrader: 2 / 100% Ride: Electric Scooter Blog Entries: 1 Rep Power: 531	its for the A/c system. more commonly called the A/C Request Input. it raises/adjusts idle approprately when the a/c is kicked on.

01-27-2004, 09:48 AM	#4
BryanPendleton Junior Member Join Date: Jan 2004 Posts: 9 iTrader: 0 / 0% Rep Power: 0	I have determined that the sensor is the Knock Sensor, which mine was missing on the motor I purchased. . . . Off to the salvage yard.

01-27-2004, 10:03 AM	#5
pissedoffsol RETIRED Join Date: Sep 2002 Location: Retirement Home Age: 29 Posts: 49,951 iTrader: 2 / 100% Ride: Electric Scooter Blog Entries: 1 Rep Power: 531	can't be. 97 ex's dont have a knock sensor.... why would it be part of the harness?

01-27-2004, 10:18 AM	#6
slickvic Member Join Date: Oct 2003 Posts: 96 iTrader: 0 / 0% Rep Power: 13	the 97 ex does have a knock sensor.........

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Help with sensor identification