ENGINE DIAGNOSIS (RHZ ENGINE WITH SINGLE-CONNECTOR ECM)
6-49
TROUBLESHOOTING
STEP
ACTION
YES
NO
1
Was “ENGINE DIAG. FLOW TABLE”
performed?
Go to Step 2.
Go to “ENGINE DIAG.
FLOW TABLE”.
2
Is operating sound heard from fuel pump?
Go to Step 3.
Proceed to DTC
P0230 Diag. Flow
table.
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?
Go to Step 4.
“BLU / WHT” wire
open, shorted to
power / ground or fuse
broken.
4
Check Boost Pressure Regulator Solenoid
Valve
1) Check solenoid valve referring to Section
6E3.
Is check result as specified?
“GRN / BLK” wire open or
shorted to power / ground.
Poor C51-26 connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck.
(See NOTE.)
Faulty solenoid valve.
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.
