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3-50 FUEL SYSTEM (DFI)
Main Throttle Sensor (Service Code 11)
•
Turn the ignition switch off.
•
Measure the output voltage with the engine stopped and
with the connector joined.
•
Turn the ignition switch on.
Output Voltage
Standard: DC 1.02
∼ 1.06 V at idle throttle opening
DC 4.22
∼ 4.42 V at full throttle opening (for
reference)
NOTE
○
Open the throttle, confirm the output voltage will be
raise.
○
The standard voltage refers to the value when the volt-
age reading at the Input Voltage Inspection shows 5 V
exactly.
○
When the input voltage reading shows other than 5 V,
derive a voltage range as follows.
Example:
In the case of a input voltage of 4.75 V.
1.02 × 4.75 ÷ 5.00 = 0.969 V
1.06 × 4.75 ÷ 5.00 = 1.007 V
Thus, the valid range is 0.969
∼
1.007 V
•
Turn the ignition switch off.
If the reading is out of the standard, replace the throttle
body assy.
If the reading is within the standard, replace the ECU and
check the wiring for continuity between main harness con-
nectors.
Disconnect the ECU and sensor connectors.
Wiring Continuity Inspection
ECU Connector [A] ←→
Main Throttle Sensor Connector [B]
Y/W lead (ECU terminal 27) [C]
G lead (ECU terminal 49) [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).
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