Suzuki Engine 2002 GRAND VITARA SQ625, Service Manual

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ENGINE GENERAL INFORMATION AND DIAGNOSIS (G16/J20 ENGINES) 6-99
TROUBLESHOOTING (DTC P0403/DTC No.51)
Step Action Yes No
1 Was “Engine Diag. Flow Table” performed? Go to Step 2. Go to “Engine Diag. Flow
Table”.
2 EGR Valve Check :
1) With ignition switch OFF, disconnect con-
nector from EGR valve.
2) Check for proper connection to EGR valve
at each terminal.
3) If OK, check EGR valve for resistance refer-
ring to “EGR System” in Section 6E1.
Is check result as specified?
Go to Step 3. EGR valve malfunction.
3 Wire Harness Check :
1) Connect connector to EGR valve.
2) Remove ECM (PCM) cover and disconnect
connector from ECM (PCM).
3) Check for proper connection to ECM (PCM)
at system related terminals.
4) If OK, check for resistance between follow-
ing terminals of ECM (PCM) connector dis-
connected.
EGR valve resistance
C51-2-13 and C51-3-4, C51-2-14 and C51-3-4,
C51-2-15 and C51-3-4, C51-2-16 and C51-3-4
: 20 – 24
Ω
at 20°C, 68°F
C51-2-13 and ground, C51-2-14 and ground,
C51-2-15 and ground, C51-2-16 and ground
: Infinity (
∞
)
Is check result as specified?
Intermittent trouble or
faulty ECM (PCM).
Recheck referring to
“Intermittent and Poor
Connection” in Section
0A. “BLU/BLK”, “LT GRN”, “LT
GRN/WHT”, “LT GRN/
YEL” or “LT GRN/RED”
circuit open or shorted to
ground.