Check Chart 3

Check Chart 3: Hood Switch Input Circuit:

3. HOOD SWITCH INPUT CIRCUIT

Description of Operation
When the hood is closed (the hood switch is switched OFF), HIGH-level signals are sent to the ECU:

When the hood is opened (the hood switch is switched ON), LOW-level signals are sent to the ECU.

Check Chart 3: ECU Terminal No. 18:

ECU Terminal Voltage (Connection condition of the ECU connector).