1. Double relay
2. ECM
3. EGR solenoid valve
4. Booster pump
5. “ENG” fuse (15 A)
6. “FUEL PUMP” fuse (15 A)
6-54
ENGINE DIAGNOSIS (RHZ ENGINE WITH SINGLE-CONNECTOR ECM)
DTC P0403 (P0403) EGR SOLENOID VALVE CIRCUIT MALFUNCTION
WIRING DIAGRAM
DTC CONFIRMATION PROCEDURE
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze flame data by using scan tool.
3) Check DTC and pending DTC by using scan tool.
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 EGR solenoid valve connector with
ignition switch turned OFF.
2) With ignition switch ON, check voltage between
“BLU / WHT” wire terminal of solenoid valve
connector and ground.
D
Within 5 sec. after ignition switch ON: 10 – 14 V
D
Over 5 sec. after ignition switch ON: about 0 V
Is check result as specified?
Go to Step 4.
“BLU / WHT” wire
open, shorted to
power / ground or fuse
broken.
4
Check EGR Solenoid Valve
1) Check solenoid valve referring to Section 6E3.
Is it in good condition?
D
“LT GRN / RED” wire
open or shorted to
power / ground
D
Poor C51-52
connection
If wire and connection
are OK, substitute a
known-good ECM and
recheck.
Faulty EGR solenoid
valve.
