Mass Air Flow Sensor (Maf Sensor) - Suzuki GRAND VITARA XL-7 Owner's Manual

6E2-32 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)

Mass air flow sensor (MAF sensor)

INSPECTION
NOTE:
Use voltmeter with high-impedance (10 kΩ Ω Ω Ω /V minimum)
or digital type voltmeter.
1) Connect voltmeter (1) to "B+" terminal of MAF sensor (2)
coupler disconnected and ground (3).
2) Turn ignition switch ON and check that voltage is battery volt-
age.If not, check if wire harness is open or connection is
poor.
3) Turn ignition switch OFF and remove ECM/PCM cover (1)
from bracket.
4) Connect MAF sensor coupler to MAF sensor.
5) Turn ignition switch ON and check voltage at MAF sensor
output terminal of ECM/PCM connector (1).
MAF sensor output voltage
Voltage: 1.0 - 1.6 V
6) Start engine and check that voltage is lower than 5 V and it
rises as engine speed increases.
(Reference data: 1.7 – 2.0 V at specified idle speed)
If check result is not as specified above, cause may lie in
wire harness, coupler connection, MAF sensor or ECM/
PCM.