Service Manual — page 141 of 715

Fuel System (DFI) › Main Throttle Sensor Inspection (Service Code 11/DTC P0123)
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FUEL SYSTEM (DFI) 3-51
Main Throttle Sensor (Service Code 11) (DTC P0120, P0123)
(Checking wire for short circuit to ground)
• Check the wiring for short circuit to ground by check-
  ing the continuity between the sensor connector [A] and
  frame ground [B].
    Wiring Continuity Inspection
     Y/W lead (ECU terminal 27) [C] ←→ Frame Ground
    If there is continuity, repair or replace the main harness.
    If there is no continuity, check the sensor for internal short
    circuit.

(Checking sensor for internal short circuit)
• Connect the setting adapter [A] to the sensor connector
  only.
    Special Tool - Throttle Sensor Setting Adapter:        57001
                      -1538
• Measure the main throttle sensor resistance.
    Main Throttle Sensor Resistance
     Connections to Adapter:
        Digital Meter (+) → R (sensor BL) lead
        Digital Meter (–) → BK (sensor G) lead

      Standard:        4 ∼ 6 kΩ
    If the reading is out of the standard, replace the throttle
    body assy.
Main Throttle Sensor Inspection (Service Code
11/DTC P0123)
(Checking wire for short circuit to power supply wire)
• Remove:
   Right Side Cover (see Side Cover Removal in the Frame
   chapter)
• Disconnect the main throttle sensor connector and con-
  nect the setting adapter [A] between the connectors.
   Main Harness [B]
   Main Throttle Sensor [C]
    Special Tool - Throttle Sensor Setting Adapter:        57001
                      -1538
• Connect a digital meter [D] to the setting adapter leads.
    Main Throttle Sensor Output Voltage
     Connections to Adapter:
        Digital Meter (+) → W (sensor Y/W) lead
        Digital Meter (–) → BK (sensor G) lead

• Measure   the output voltage with the engine stopped and
  with the connector joined.
• Turn the ignition switch on.
    Output Voltage
     Standard:        DC 1.03 ∼ 1.06 V at idle throttle opening
                      DC 4.13 ∼ 4.52 V at full throttle opening
                      (for reference)

• Turn the ignition switch off.