MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-527
HO2S
BANK2
S1
A3
*6
Heated
oxygen
sensor (bank
2, sensor 1)
Engine: Warm
(air/fuel
mixture is
made leaner
when
decelerating,
and is made
richer when
revving.)
When the
engine is
running at
4000 r/min,
decelerated
suddenly.
0.2 V or less to
0.6
−
1 V (After
several
seconds have
elapsed)
Code No.
P0150,
P0153,
P0154
P.13B-154
,
P.13B-164
,
P.13B-166
Engine: Warm
(the heated
oxygen sensor
signal is used
to check the
air/fuel mixture
ratio, and
control
condition is
also checked
by the PCM
<A/T> or ECM
<M/T>)
Engine is idling Voltage
alternates
between 0.4 V
or less and 0.6
−
1 V.
2,500 r/min
HO2S
BANK2
S2
A4
*6
Heated
oxygen
sensor (bank
2, sensor 2)
Engine:
warming up
Revving
0 and 0.6
−
1 V
alternate.
Code No.
P0156,
P0159
P.13B-179
,
P.13B-189
IAT
SENSOR
13
*6
Intake air
temperature
sensor
Ignition switch:
"ON" or with
engine running
Intake air
temperature is
-20
°
C (-4
°
F)
-20 degC
(-4 degF)
Code
No.P0111
P.13B-56
Intake air
temperature is
0
°
C (32
°
F)
0 degC
(32 degF)
Intake air
temperature is
20
°
C (68
°
F)
20 degC
(68 degF)
Intake air
temperature is
40
°
C (104
°
F)
40 degC
(104 degF)
Intake air
temperature is
80
°
C (176
°
F)
80 degC
(176 degF)
IG.
TIMING
ADV
44
*6
Ignition coils
and ignition
power
transistor
•
Engine:
warming up
•
Timing light
is set (to
check actual
ignition
timing)
Engine is idling 7
−
23 deg
-
-
2,500 r/min
28
−
48 deg
MUT-II SCAN
TOOL
DISPLAY
ITEM
NO.
INSPECTION
ITEM
INSPECTION REQUIREMENT
NORMAL
CONDITION
INSPECTION
PROCEDURE
NO.
REFERENCE
PAGE