Service manual

FUEL SYSTEM (DFI) 3-43
Throttle Sensor (Service Code 11)
If the input voltage is less than the standard, remove the
ECU and check the wiring between these connectors.
○
Disconnect the ECU and sensor connectors.
Wiring Connection
ECU Connector [A] ←→
Throttle Se nsor Connector [B]
BR/W lead (ECU terminal 3)
BR/BK lead (ECU terminal 10)
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).
Throttle Sensor Output Voltage Inspection
•
Measure t he output voltage at the throttle sensor in the
same way as input voltage inspection, Note the following.
○
Disconnect the throttle sensor connector and connect the
harness adapter [A] between these connectors.
○
In this photo, the air cleaner has been removed for clarity.
Special Tool - Throttle Sensor Setting Adapter: 57001
-1521
Throttle Sensor Output Voltage
Connections to Adapter
Meter (+) → Y/W (sensor Y/W) lead
Meter (–) → BK/BL (sensor BR/BK) lead
•
Start the engine and warm it up thoroughly.
•
Check idle speed to ensure the throttle opening is correct.
Idle Speed
Standard: 1 100 ±50 r/min (rpm)
If the idle speed is out of the specified range, adjust it
(see Idle Speed Inspection in the Periodic Maintenance
chapter).
•
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 at Sensor
Standard: DC 1.00 ∼ 1.24 V (at id le throttle open ing)
DC 4.0 ∼ 4.4 V (at full throttle opening)
•
Turn the ignition switch OFF.
If the output voltage is out of the standard, inspect the
throttle sensor resistance (see Throttle Sensor Resis-
tance Inspection).