Mazda 626 1989 Workshop Manual page 373

Number: 002/93
Section 1- ECU DIAGNOSTICS PROCEDURE
1. Disconnect ECU connectors
2. Connect SST (Engine Signal Monitor and Adapter)
as shown. Place application panel sheet on the
Engine Signal Monitor.
3. Measure the voltage according to the specifications
in the workshop manual.
4. If the voltage is different than specified, check the
related input and output devises and wiring for dam­
age. If no problem is found and the reading remains
out of specification, replace the ECU.
5. If the voltage is within specification and the problem
still exists, contact the Technical Hotline for assis­
tance.
Terminals A&B are for external voltmeter con­
CAUTION:
nections. Use these terminal to attach a digi­
tal voltmeter or oscilloscope for precise volt
readings.
Never apply current to these terminals,
dam age to the ECU will result.
Page 4 of 18
Date Issued: 9/16/93
Revised:
ECU
Application Panel Sheet
Engine Signal Monitor
Terminals A and B
CNSME SK3HM L M0MTQR
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