3-64 FUEL SYSTEM (DFI)
Subthrottle Sensor (Service Code 32)
Subthrottle Sensor Output Voltage
Connections to Adapter:
Digital Meter (+) → Y/W (sensor BR) lead
Digital Meter (–) → BK/BL (sensor BR/BK) lead
Turn the ignition switch to ON.
Measure the output voltage when the subthrottle valve is
fully opened or completely closed by hand.
DC 0.6 ∼ 0.8 V (at idle throttle opening)
DC 4.08 ∼ 4.12 V (at full throttle opening)
Turn the lever counterclockwise, confirm the output volt-
age will be raise.
The standard voltage refers to the value when the volt-
age reading at the Input Voltage Inspection shows 5 V
When the input voltage reading shows other than 5 V,
derive a voltage range as follows.
In the case of a input voltage of 4.75 V.
0.6 × 4.75 ÷ 5.00 = 0.57 V
0.8 × 4.75 ÷ 5.00 = 0.76 V
Thus, the valid range is 0.57
Turn the ignition switch to OFF.
If the output voltage is out of the standard, inspect the
subthrottle sensor resistance.
If the reading is within the standard, remove the ECU and
check the wiring for continuity between main harness con-
Special Tool - Hand Tester: 57001-1394
Disconnect the ECU and sensor connectors.
Wiring Continuity Inspection
ECU Connector [A] ←→
Subthrottle Sensor Connector [B]
BR lead (ECU terminal 19) [C]
BR/BK lead (ECU terminal 22) [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).