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Troubleshooting
SYMPTOM: No signal from the sensor.
CAUSE: Cable connections defective.
REMEDY: Check the connections in the MUX and the sensor cable.
The installation checker (VIB 8.745) can be used to test sensor leads.
The three status LEDs on the housing indicate the condition:
- Green LED : OK
- Red LED :
Short circuit
- Yellow LED: Ground loop
Use a cable with banana plugs and alligator clips to connect the sen-
sor cable. If none of the LEDs illuminate during testing and the battery
is known to be fresh, then the sensor connection is broken.
The installation checker is powered by a 9V battery. Battery condition
can be checked as follows:
• Connect the 'BATT. TEST' and 'GROUND' terminals together.
• If the yellow LED illuminates, then battery voltage is below 5 volts
and is no longer sufficient for reliable testing.
Lead testing
Battery testing
Installation checker
VIB 8.745
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