Subthrottle Valve Actuator (Service Code 62)
Subthrottle Valve Actuator Input Voltage Inspection
Be sure the battery is fully charged.
Turn the ignition switch OFF.
Connect the peak voltage adapter [A] and a digital meter
[B] to the connector [C], using the needle adapter set [D].
Special Tools - Peak Voltage Adapter: 57001-1415
Brand: KOWA SEIKI
Needle Adapter Set: 57001-1457
Subthrottle Valve Actuator Input Voltage
Connections to Harness Connector
Meter (+) → BK/BL lead 
Meter (–) → P lead 
Meter (+) → W/BL lead 
Meter (–) → G/Y lead 
Measure the actuator input voltage with the engine
stopped, and with the connector joined.
Turn the ignition switch ON.
Input Voltage at Actuator
about 8.5 ∼ 10.5 V DC
If the reading is within the standard but the actuator
doesn't operate, replace it.
If the reading is out of the range, check the wiring to ECU
(see wiring diagram in this section).
If the wiring is good, check the ECU for its ground and
power supply (see ECU Power Supply Inspection).
Subthrottle Valve Actuator Circuit
2. Subthrottle Valve Actuator
FUEL SYSTEM (DFI) 3-69