Engine Control Module: Testing and Inspection

How to use the Engine Signal Monitor (SST Mazda Part# 49 9200 162).

Engine Signal Monitor:

1. Connect the engine signal monitor between the control unit and the engine harness using the adapter (SST Mazda Part# 49 U018 001).
2. Turn the selector switch and monitor switch to select the terminal number.
3. Check the terminal voltage.

CAUTION: DO NOT APPLY VOLTAGE TO THE TERMINALS OF THE SST

PRECAUTIONS

Improper Testing Procedure:

1. Never push the circuit tester test probe into the connectors from the engine control unit side.
2. Before checking the engine control unit, troubleshoot with the self-diagnosis checker.

Pinched Wire:

3. Before replacing the engine control unit, first check the parts, wiring harnesses, and terminal contacts if the terminal voltage is incorrect, and repair as necessary.

INSPECTION OF TERMINAL VOLTAGE

1. Warm up the engine and stop it.

Terminal Voltage Inspection:

2. Disconnect the connector from the engine control unit.
3. Connect the adapter (Mazda Part# 49 U018 001 between the engine control unit and the connector.
4. Connect the Engine Signal Monitor (Mazda Part# 49 9200 162) to the adapter.
5. Check the voltage of each terminal.