DR ALL-TERRAIN Service Manual download pdf (Page 154)

100

101

3-90 FUEL SYSTEM (DFI)

Throttle Body Assy

•

Remove the bypass screw [A], spring [B], washer [C] and

O-ring [D].

○

Check the bypass screw and its hole for carbon deposits.

If any carbon accumulates, wipe the carbon off the bypass

screw and the hole, using a cotton pad penetrated with a

high-flash point solvent.

○

Replace the O-ring with a new one.

○

Check the tapered portion [E] of the bypass screw for

wear or damage.

If the bypass screw is worn or damaged, replace it.

•

Turn in the bypass screw until it seats fully but not tightly.

•

Repeat the same procedure for other bypass screw.

•

Repeat the synchronization.

If the vacuums are correct, check the output voltage of

the throttle sensor (see Throttle Sensor Output Voltage

Inspection in the Fuel System (DFI) chapter).

Throttle Sensor Output Voltage

Connections to ECU

Meter (+) → Y/W lead (ECU terminal 15)

Meter (–) → BR/BK lead (ECU terminal 10)

Standard:

1.00 ∼ 1.24 V DC (at idle throttle opening)

If the output voltage is out of the range, check the throttle

input voltage (see Throttle Sensor Input Voltage Inspec-

tion in the Fuel System (DFI) chapter).

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DR ALL-TERRAIN Service Manual Page 154

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