Vacuum Sensor (W/O Air Flow Meter) (Manifold Absolute Pressure Sensor - Toyota 4A-FE Repair Manual

Fl-140
Type A
Type 8
Filter
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EFI SYSTEM - Electronic Control System
Vacuum Sensor (w/o Air Flow Meter)
(Manifold Absolute Pressure Sensor)
Vacuum Chamber
Terminal
ECU
Vacuum Sensor
(Manifold Absolute Pressure Sensor}
E2
n-~~~ ~~~~~-uE2
PIM
n-~~~~~~~~~~JP\M
VCC
- - - - - - - - - { ) vcc
FROM INT AKE MANIFOLD
Vacuum Chamber
Terminal
Filter
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FROM INTAKE MANIFOLD
Voltmeter Voltmeter
Fl4918 Fl4920
F14916F14917
E1
Fl4424
F14.548 Fil 226
INSPECTION OF VACUUM SENSOR
1. INSPECT POWER SOURCE VOLTAGE OF VACUUM
SENSOR
(a) Disconnect the vacuum sensor connector.
(b) Turn the ignition switch ON.
(c)
Using a voltmeter, measure the voltage between ter-
minals VCC and E2 of the vacuum sensor connector.
Voltage: 4 - 6 V
2. INSPECT POWER OUTPUT OF VACUUM SENSOR
(a) Turn the ignition switch ON.
(b} Disconnect the vacuum hose of the intake manifold
side.