Electric Load Sensor: Testing and Inspection

Electrical load signals (component "ON") are sent to the ECU from the headlight, rear window defroster and blower motor switches.

HEADLIGHT SWITCH

Headlight switch signal can be checked at ECU terminal 1H. With headlights "ON," terminal voltage should be approximately 10 - 12V. With headlights "OFF," voltage should be below 2.5V.

REAR WINDOW DEFROSTER SWITCH

Rear window defroster switch signal can be checked at ECU terminal 1J. With switch "ON," terminal voltage should be below 2.5V. With switch "OFF," terminal voltage should be approximately 12V.

BLOWER MOTOR SWITCH

Blower motor switch signal can be checked at ECU terminal 1P, ignition "ON." With blower switch "ON" at 5th - 8th positions, terminal voltage should be below 1.5V. At other positions, voltage should be approximately 12V.