timing sensor test

Ameer Antar antar at comcast.net
Mon Aug 2 04:28:25 EDT 2004

Hall sensors usually have 3 lines: voltage, ground, and output. You should be able to determine which ones are positive and ground by the color of the wires or by doing some detective work w/ a VOM... and then the ouput by elimination. Make sure you have the proper voltage coming in from the engine's wiring harness, and then you can use some alligator clips to connect the pos/neg pins from the wiring harness to the sensor. Now measure the voltage across the output and ground while moving a piece of steel across the sensors path. You should see some change in voltage... usually high voltage normally and near 0V when steel is in front of the sensor, but can be reversed. Good luck.


----Original Message----
Date: Sat, 31 Jul 2004 16:38:31 -0500
From: Jim & Michelle <jimhill at blomand.net>
Subject: timing sensor test
To: quattro at audifans.com
Message-ID: <001101c47746$ba7bad20$17b590cf at jim-s>
Content-Type: text/plain;	charset="iso-8859-1"

I'm trying to track a no spark condition in my 87, 5k.  So far I put together a low voltage LED test light, 1. checked the hall sender, test light flickered. (o.k.). 2. Run a test at the coil transistor connector, no flashing light. I've got a manual ordered but in the meantime I know this either means a bad transistor in the icu, or maybe the timing sensor or rpm sensors aren't sending any info to the icu.  How can I check the sensors to see which is the culprit?
OH yeah, the code was giving a hall sender code (2113). Am I on the right track?



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