Manual Transmission

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

HEADLIGHT SWITCH

Headlight switch signal can be checked at ECU terminal 1U. With headlights "ON," terminal voltage should be approximately 12V. With headlights "OFF," voltage should be below 1.5V.

BLOWER MOTOR SWITCH

Blower motor switch signal can be checked at ECU terminal 1S, ignition "ON." With blower switch "OFF" or in low position, terminal voltage should be approximately 12V. With switch "ON" in 3rd or 4th high position, voltage should be below 1.5V.

COOLING FAN SWITCH

Fan switch signal can be checked at ECU terminal 1R. With coolant temperature below 97°C (207°F), terminal should read battery voltage. Above 97°C (207°F), voltage should be below 1.5V.

REAR WINDOW DEFROSTER SWITCH

Rear window defroster switch signal can be checked at ECU terminal 1T, ignition "ON." With defroster switch "OFF," terminal should read battery voltage. With switch "ON," voltage should be below 1.5V.