HEADLIGHT CLEANER RELAY INSPECTION

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1. Remove the headlight cleaner relay with the connector still connected.

2. Measure the voltage at each terminal.

  • If the voltage is not as specified in the Terminal Voltage Table (Reference), inspect the parts under “Inspection item(s)”.
    ― If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the headlight cleaner relay.

Terminal Voltage Table (Reference)

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Terminal | Signal name | Connected to | Measured condition | Voltage (V)/Continuity | Inspection item(s)
--- | --- | --- | --- | --- | ---
A | Headlight cleaner motor output | Headlight cleaner motor | Headlight cleaner activated (auto-operation or manual operation activated) | Alternates between 1.0 or less and B+ | • Headlight relay (See RELAY INSPECTION.) • Wiper and washer switch (See WIPER AND WASHER SWITCH INSPECTION.) • Headlight cleaner motor (See HEADLIGHT CLEANER MOTOR INSPECTION.) • Related wiring harnesses
Except above | B+
B | Washer motor output | Wiper and washer switch | Turn the ignition switch to the ON position. | Turn the washer switch to the OFF position. | 1.0 or less | • Headlight relay (See RELAY INSPECTION.) • Wiper and washer switch (See WIPER AND WASHER SWITCH INSPECTION.) • Related wiring harnesses
Turn the washer switch to the ON position. | B+
C | GND | Body ground | Under any condition | 1.0 or less | • GND • Related wiring harnesses
D | Headlight | Headlight relay | Light switch at ON position. | B+ | • Headlight relay (See RELAY INSPECTION.) • Related wiring harnesses
Except above | 1.0 or less