Section 04 FUEL SYSTEM
Subsection 02 (ELECTRONIC FUEL INJECTION (EFI))
Install the D.E.S.S. key on its post.
Briefly press the START button to wake up the
ECM. Do not start engine.
Connect B.U.D.S. Refer to
COMMUNICATION
TOOLS AND B.U.D.S. SOFTWARE.
In B.U.D.S., select the Monitoring tab then the
ECM tab. Use the Throttle Opening.
mmr2009-120-001
MONITORING AND ECM TABS
Slowly and regularly depress the throttle lever.
Observe the needle movement.
NOTE: An initial slight delay after the throttle lever
is depressed and before the needle starts to move
is normal.
Needle should change gradually and regularly
as you move the throttle lever. If the needle
“sticks”, bounces or suddenly drops, it may indi-
cates a worn TPS that needs to be replaced.
If the needle behavior is not as expected, perform
the following.
Manually move the throttle plate in throttle body
using a screwdriver (without sharp tip).
WARNING
Do not move throttle plate with your fingers.
Otherwise, if ECM would turn off, it would
quickly close the throttle plate and this could
cause serious finger injuries if you were
workinginthisarea.
smr2009-030-016_b
1. Push here
Check needle movement again.
– If needle moves as expected, check the throttle
accelerator sensor (TAS) of throttle lever. Refer
to
THROTTLE ACCELERATOR SENSOR (TAS)
in this subsection.
– If needle does not move as expected, perform
the
TPS VOLTAGE TEST
and the
TPS RESIS-
TANCE TEST
in this subsection.
TPS Resistance Test
To gain access to throttle body, remove the re-
quired parts as described in
THROTTLE BODY RE-
MOVAL.
Ensure the throttle body connector is plugged.
Disconnect the ECM connector A from the ECM.
Use the
FLUKE 115 MULTIMETER (P/N 529 035 868)
and select .
Probe circuit as per following table while using
your hand to manually move throttle plate.
FULLY CLOSED
THROTTLE
PLATE
(1)
FULLY OPEN
THROTTLE
PLATE
ECM
ADAPTER
RESISTANCE (
)
PIN MIN. MAX. MIN. MAX.
A-A2 A-K4 875 1625 875 1625
A-A2 A-K3 954 1934 228 585
A-A2 A-F3 254 634 980 1983
A-K3 A-K4 228 585 954 1934
A-K3 A-F3 1385 2315 1385 2315
A-K4 A-F3 980 1983 254 634
(1)
To obtain the fully closed position, it is necessary
to push against throt
tle plate in throttle body
with your hand and hold it in this position for the
measurement.
240 smr2009-030
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