Suzuki Grand Vitara XL-7 Service Manual page 167

6-1-28 ENGINE DIAGNOSIS (RHZ ENGINE WITH TRIPLE-CONNECTOR ECM)
TROUBLESHOOTING
STEP
1 Was "ENGINE DIAG. FLOW TABLE"
performed?
2 Is operating sound heard from fuel pump?
3 Check Wire Harness
1) Disconnect boost pressure regulator
solenoid valve connector with ignition switch
OFF.
2) With ignition switch ON, check voltage
between "BLU/WHT" wire terminal of
solenoid valve connector disconnected and
ground.
Within 5 sec. after ignition switch ON:
about 12 V
Over 5 sec. after ignition switch ON: 0 V
Is check result as specified?
4 Check Boost Pressure Regulator Solenoid
Valve
1) Check solenoid valve referring to Section
6E3.
Is check result as specified?
NOTE:
If DTC is checked using generic scan tool only and DTC P0245 (P0243)/P0246 (P0243) Diag. Flow Table is
not performed yet, go to the table before ECM replacement.
ACTION YES
Go to Step 2.
Go to Step 3.
Go to Step 4.
"GRN /BLK" wire open or
shorted to power/ground.
Poor E229-31 connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck.
(See NOTE.)
NO
Go to "ENGINE DIAG.
FLOW TABLE".
Proceed to DTC
P0230 Diag. Flow
table.
"BLU/WHT" wire
open, shorted to
power /ground or fuse
broken.
Faulty solenoid valve.