Symbols (Terminal No.)

Wiring Color

Terminal Description


Specified Condition

BECU (4B-30) - GND1 (4E-17)

L - W-B

Battery (power supply)


11 to 14 V

GND1 (4E-17) - Body ground

W-B - Body ground



Below 1 Q

If the result is not as specified, there may be a malfunction in the wire harness. (c) Reconnect the main body ECU (vehicle rear side) connectors.

(d) Measure the voltage of the wire harness side connectors.

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Do It Yourself Car Diagnosis

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