FI SYSTEM 4-35
OUTPUT VOLTAGE (VCC VOLTAGE 4.5 – 5.0 V, AMBIENT
TEMP. 20 – 30 °C, 68 – 86 °F)
ALTITUDE
(Reference)
ATMOSPHERIC
PRESSURE
OUTPUT
VOLTAGE
(ft) (m) (mmHg) kPa (V)
0
2 000
0
610
760
707
100
94
3.4 – 4.0
2 001
5 000
611
1 524
707
634
94
85
3.0 – 3.7
5 001
8 000
1 525
2 438
634
567
85
76
2.6 – 3.4
8 001
10 000
2 439
3 048
567
526
76
70
2.4 – 3.1
3
Ye s
No
If check result is not satis-
factory, replace IAP sensor
with a new one.
Red, G/B or B/Br wire open or shorted to ground, or poor
0
,
F
or
X
connection. (
:
4-22)
If wire and connection are OK, intermittent trouble or faulty
ECM.
Recheck each terminal and wire harness for open circuit and
poor connection. (
:
4-5)
Remove the IAP sensor.
Connect the vacuum pump gauge to the vacuum port of
the IAP sensor.
Arrange 3 new 1.5 V batteries in series (check that total
voltage is 4.5 – 5.0 V) and connect
-
terminal to the
ground terminal and
+
terminal to the Vcc terminal.
Check the voltage between Vout and ground. Also, check
if voltage reduces when vacuum is applied up to 40 cmHg
by using vacuum pump gauge. (See table below.)
z
09917-47010: Vacuum pump gauge
09900-25008: Multi circuit tester
u
Tester knob indication: Voltage (
-
)
Replace the ECM with a new
one, and inspect it again.
ECM coupler
3
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