Exhaust Butterfly Valve Actuator Sensor (Service Code 34)
Exhaust Butterfly Valve Actuator Sensor Output
Before this inspection, confirm the pulley [A] is original
position (see Exhaust Butterfly Valve Actuator Installa-
2 pins Connector [B]
3 pins Connector [C]
Connect the harness adapter [A] between the 3 pins con-
Special Tool - Throttle Sensor Setting Adapter #1: 57001
Connect a digital meter to the harness adapter leads.
Exhaust Butterfly Valve Actuator Sensor Output Voltage
Connections to Adapter:
Digital Meter (+) → BL (actuator Y) lead
Digital Meter (−) → BK/BL (actuator BK) lead
Measure the output voltage at the 3 pins connector of the
exhaust butterfly valve actuator when the pulley is original
Turn the ignition switch ON.
Standard: DC 3.46 ∼ 3.76 V at pulley original position
Turn the ignition switch OFF.
If the reading is out of the standard, check the exhaust
butterfly valve actuator sensor resistance (see Exhaust
Butterfly Valve Actuator Sensor Resistance Inspection).
If the reading is within the standard, remove the ECU and
check the wiring for continuity between main harness con-
Disconnect the ECU and sensor connectors.
ECU Connector [A] ←→
Exhaust Butterfly Valve Actuator Sensor Connector [B]
R/BK lead (ECU terminal 5) [C]
BR/BK lead (ECU terminal 28) [D]
If the wiring is good, check the ECU for its ground and
power supply (see ECU Power Supply Inspection).
If the ground and power supply are good, replace the ECU
(see ECU Removal/Installation).
FUEL SYSTEM (DFI) 3-85