Precautions of ECM Circuit Inspection

WARNING: This page is about a different variant/trim than selected.

When measuring circuit voltage and/or pulse signal at ECM connector, connect the special tool to ECM and ECM connectors referring to INSPECTION OF ECM AND ITS CIRCUITS and note the following.

ECM connectors are waterproofed. Each terminal of the ECM connectors is sealed with the grommet.
Therefore, do not insert the tester probe into sealed terminal from harness side. When measuring circuit voltage and/or pulse signal at ECM connector, be sure to connect special tool to ECM connectors and insert tester probe into special tool's connectors at harness side. Otherwise, ECM and its circuits may be damaged by water.
Wire colors of special tool's connectors are different from those of ECM connectors. However, terminal arrangement of these connectors are the same as those of ECM connectors. Therefore, be sure to identify the terminal location in order to measure proper terminal.