Suzuki GRAND VITARA XL-7, Руководство по обслуживанию

Страница: 150 / 597

ENGINE DIAGNOSIS (RHZ ENGINE WITH TRIPLE-CONNECTOR ECM) 6-1-11
TROUBLESHOOTING
STEP ACTION YES NO
1 Was “ENGINE DIAG. FLOW TABLE” performed? Go to Step 2. Go to “ENGINE
DIAG. FLOW
TABLE”.
2 MAF sensor power supply Check:
1) With ignition switch OFF, disconnect MAF sensor
coupler.
2) With ignition switch ON, check voltage between
“BLK / WHT” wire terminal of MAF sensor coupler and
“BLK” wire terminal of MAF sensor coupler.
Is voltage 10 – 14 V?
Go to Step 3. Faulty “BLK / WHT”,
“BLK” wire.
3 MAF sensor output voltage Check:
1) With ignition switch OFF, connect MAF sensor
coupler.
2) Remove ECM (PCM) cover.
3) Start engine and check voltage between E228-29 and
E228-30 terminal at idle speed.
Is voltage about 2 V?
Poor E228-29 and
E228-30 connection.
Faulty “BLK” wire
connection.
If OK, substitute a
known-good ECM
and recheck.
(See NOTE) Faulty “PPL / WHT”,
“BRN / BLU” wire.
Poor MAF sensor
coupler terminal
connection.
If wire and connec-
tion are OK, substi-
tute a known-good
MAF sensor and
recheck.
NOTE:
If DTC is checked using generic scan tool only and DTC P0101 (P0100) Diag. Flow Table is not performed
yet, go to the table before ECM replacement.