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psom_c252.jpg PSOM C252
For more info, read the PREVious/NEXT several pages.

CHECK SPEED INPUT SIGNAL 

NOTE: Only wiring harness end of connector is to be probed. 
* Connect Rotunda Digital Volt-Ohmmeter 014-00407 or equivalent to Pin 4 (speed in ) and Pin 5 (speed in -). 
* Does the voltage increase smoothly and continuously from 0 to approximately 3.5 volts as vehicle speed increases from 0 to 48 km/h (0 to 30 mph)? 
OR: 
* If available, a frequency counter may be connected to Pin 4 (Speed in ) and Pin 5 (Speed in -). 
* Does the displayed frequency of the signal increase smoothly and continuously from 0 to approximately 667 Hz at approximately 48 km/h (30 mph)? 
OR: 
* If neither a voltmeter nor frequency counter is available, vehicle speed control may be used as a good indicator. If it works normally, then the speedometer module is at least receiving a speed input signal and the wiring and  [url=https://www.amazon.com/dp/B001H1MQFI]ABS sensor (DY1123, F85Z-9E731-AB)[/url] can be assumed to be good.
psom_c252.jpg | Hits: 10689 | Posted on: 9/23/08 | View original size (61.85 KB)

PSOM C252
For more info, read the PREVious/NEXT several pages.

CHECK SPEED INPUT SIGNAL

NOTE: Only wiring harness end of connector is to be probed.
* Connect Rotunda Digital Volt-Ohmmeter 014-00407 or equivalent to Pin 4 (speed in ) and Pin 5 (speed in -).
* Does the voltage increase smoothly and continuously from 0 to approximately 3.5 volts as vehicle speed increases from 0 to 48 km/h (0 to 30 mph)?
OR:
* If available, a frequency counter may be connected to Pin 4 (Speed in ) and Pin 5 (Speed in -).
* Does the displayed frequency of the signal increase smoothly and continuously from 0 to approximately 667 Hz at approximately 48 km/h (30 mph)?
OR:
* If neither a voltmeter nor frequency counter is available, vehicle speed control may be used as a good indicator. If it works normally, then the speedometer module is at least receiving a speed input signal and the wiring and ABS sensor (DY1123, F85Z-9E731-AB) can be assumed to be good.
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