MPI – Troubleshooting
13-20
Item
No.
Normal conditionInspection contentsInspection
item
41 Injector
drive time*
2
Engine: Cranking When engine coolant temper-
ature is 0_C (injection is
carried out for all cylinders
simultaneously)
27 – 41 ms
When engine coolant temper-
ature is 20_C
14 – 22 ms
When engine coolant temper-
ature is 80_C
3.9 – 5.9 ms
Injector
*
D Engine coolant temperature:
_
Engine is idling 1.2 – 2.4 ms
r
ve
me
–
D Lamps, electric cooling fan and
2,500 r/min 1.0 – 2.2 ms
a
accessor
es:
D Transmission: Neutral
When engine is suddenly
raced
Increases
44 Ignition
advance
D Engine: After having been
warmed up
D Timing lamp is set (The timing
Engine is idling 3 – 13_BTDC
.
lamp is set in order to check
actual ignition timing.)
2,500 r/min 24 – 44_BTDC
45 ISC
(stepper)
D Engine coolant temperature:
80 – 90_C
f
A/C switch: OFF 2 – 25 steps
position *
4
,
all accessories: OFF
D Transmission: Neutral
D Idle position switch: ON
A/C switch: OFF → ON Increases by 10 – 70
steps
(When A/C switch is ON, A/C
compressor should be operat-
ing.)
A/C switch: OFF Increases by 5 – 50
steps
49 A/C relay Engine: After having been warmed
up/Engine is idling
A/C switch: OFF OFF (Compressor
clutch is not operating)
A/C switch: ON ON (Compressor
clutch is operating)
NOTE
*1: The idle position switch normally turns off when the voltage of the throttle position sensor is 50 – 100 mV
higher than the voltage at the idle position. If the idle position switch turns back on after the throttle valve
is opened, the idle position switch and the throttle position sensor need to be adjusted.
*2: The injector drive time represents the time when the cranking speed is at 250 r/min or below when the power
supply voltage is 11 V.
*3: In a new vehicle [driven approximately 500 km or less], the injector drive time is sometimes 10% longer than
the standard time.
*4: In a new vehicle [driven approximately 500 km or less], the step of the stepper motor is sometimes 30 steps
greater than the standard value.
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