Suzuki GRAND VITARA XL-7 Service Manual

6-32 ENGINE DIAGNOSIS (RHZ ENGINE WITH SINGLE-CONNECTOR ECM)
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
ground.
Is voltage 10 – 14 V?
Go to Step 3. Faulty “BLK/WHT”
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 C51-13 and
C51-33 terminal at idle speed.
Is voltage about 2 V?
Poor C51-13
connection, Faulty
“BRN” wire and
Poor C51-22
connection.
If OK, substitute
a known-good
ECM and recheck.
(See NOTE)
Faulty “PPL/WHT”
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.

Suzuki GRAND VITARA XL-7 Specifications

General

Brand	Suzuki
Model	GRAND VITARA XL-7
Category	Automobile
Language	English