Suzuki SY413 Service Manual page 3238

1. MAF sensor couples 3. "R/B" wire terminal
2. Engine ground 4. Throttle body
1. Throttle body
2. MAF sensor
ELECTRONIC FUEL INJECTION SYSTEM (J18 ENGINE WITHOUT WU TWC) 6E3-77
3) Connect voltmeter to "R/B" wire terminal of MAF sensor coupler
disconnected and ground.
4) Turn ignition switch ON and check that voltage is battery volt-
age.
If not, check if wire harness is open or connection is poor.
5) Turn ignition switch OFF and connect MAF sensor coupler to
MAF sensor.
6) Turn ignition switch ON and check voltage at "A24" terminal.
"Standard" voltage: 0.5 – 1.0 V
7) Start engine and check that voltage is lower than 5V and it rises
as engine speed increases.
Reference data: 1.5 – 1.8 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.
REMOVAL
1) Disconnect negative cable at battery and coupler from MAF
sensor.
2) Remove throttle body, refer to "THROTTLE BODY" in this sec-
tion.
NOTE:
Don't remove MAF sensor.
CAUTION:
D Do not expose MAF sensor (throttle body) to any
shock.
D Do not put finger or any other object into MAF sen-
sor and keep away from net. Malfunction may oc-
cur.
1. Throttle body
2. MAF sensor