Engine Control Unit Check; How To Use The Engine Signal Monitor - Mazda 626 MX-6 Workshop Manual

4A
CONTROL SYSTEM
ENGINE CONTROL UNIT
Engine Signal Monitor (49 9200 162) and Adapter (49 9200 163).
The Engine Signal Monitor (49 9200 162) was developed to check the control unit terminal voltages.
This monitor easily inspects the individual terminal voltages through selection of the monitor switch.

How to Use the Engine Signal Monitor

1. Connect the Engine Signal Monitor (49 9200 162) between the engine control unit and the en­
gine harness using the adapter (49 9200 163).
2. Turn the selector switch and monitor switch to select the terminal number.
3. Check the terminal voltage.
Caution
Never apply voltage to terminals A and B.
4A—88
A d a p te r h a rn e s s
Selector switch
Monitor switch
Control unit
term inal number
■ $ "' '
•
49 9200 163
Engine wiring harness'
ENGINE SIGNAL MONITOR
• -e y O-20V
® ©
Terminals
(A and B)
86U04A-171