Inspection Steps

WARNING: This page is about a different car, the 2019 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.

Check ignition switch circuit.

Turn the ignition switch to OFF.
Disconnect the ECM harness connector.
Turn the ignition switch to ON.
Measure the voltage between harness connector terminal and chassis ground.

VOLTAGE SPECIFICATION

Inspection terminals	Inspection conditions	Standard value
A33-27 (IGSW) - chassis ground	Always	10V or more

NG: Check the fuse, or repair or replace the harness.

OK: Go to next step

Check poor contact of connector.