Testing a Knock Sensor

btwilson86 · 01-17-2009, 07:23 AM

Hi, I have an 87 NA and an 88 NA, both of which have the Knock Sensor Engine Code. On both cars the wiring is still intact, meaning from plug to ECU pin I have continuity. So I am wondering if anyone knows how to bench test a Knock Sensor to see if it's faulty.

Any ideas or links would be appreciated.

jrok · 01-17-2009, 07:28 AM

at 2000 rpm hit the intake the timing should change or to bench test when you strike it it should produce some electricty but very small....problem usually in the wiring, check wire to ground, the outside of the wire should be grounded.

01-17-2009, 07:23 AM	#1
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Testing a Knock Sensor Hi, I have an 87 NA and an 88 NA, both of which have the Knock Sensor Engine Code. On both cars the wiring is still intact, meaning from plug to ECU pin I have continuity. So I am wondering if anyone knows how to bench test a Knock Sensor to see if it's faulty. Any ideas or links would be appreciated. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

01-17-2009, 07:28 AM	#2
jrok Intake Join Date: Sep 2008 Location: british columbia canada Posts: 31	in the car at 2000 rpm hit the intake the timing should change or to bench test when you strike it it should produce some electricty but very small....problem usually in the wiring, check wire to ground, the outside of the wire should be grounded. __________________ 1984 celica supra with 7mgte swap, custom intercooler, 2.5 exhaust no muffler or cat, shimmed wastegate to 12 lbs boost, with r154 turbo 5-speed tranny 16x8 xxr s13's with 245/50R16 toyo proxes 4's .http://au.youtube.com/watch?v=rgOxP0PxCwo .http://au.youtube.com/watch?v=uf989mb3EDw also own: 2000 4runner 3 inch lift, 33inch tires .http://au.youtube.com/watch?v=J15k1rCh7-A 1988 4runner stock .http://au.youtube.com/watch?v=2u7e1_pMqfs .http://au.youtube.com/watch?v=9lu4j5P6M7M ]

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Picture Of Knock Sensor Locations	ravenmaster	MKIII Supra	10	01-31-2012 03:37 PM
KNock Sensor	ZauggIt1	MKIII Supra	0	12-17-2006 05:22 PM
Knock sensor for an N/A.	rnoswal	MKIII Supra	2	11-16-2005 05:12 PM
Knock sensor..........ebay.	rnoswal	MKIII Supra	0	11-06-2005 07:24 PM
Bad Knock sensor	TWRViper	MKIII Supra	5	08-31-2005 09:24 PM