Suzuki 2000 Grand Vitara SQ416, Service Manual

Page: 87 / 729

YH4
GRAND
VITARA
ENGINE DIAGNOSIS (G16 / J20 ENGINES) 6-83
20 – 24 at
20
_
C, 68
_
F
Infinity (
8
)
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 connector
from EGR valve.
2) Check for proper connection to EGR valve at each
terminal.
3) If OK, check EGR valve for resistance referring
to “EGR Valve Inspection” 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 following
terminals of ECM (PCM) connector disconnected.
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
C51-2-13 and ground
C51-2-14 and ground
C51-2-15 and ground
C51-2-16 and ground
Is check result as specified?
Intermittent trouble
or faulty ECM
(PCM).
Recheck referring
to “Intermittent and
Poor Connection” in
Section 0A. “Bl / B”, “Lg”, “Lg / W”
“Lg / Y” or “Lg / R”
circuit open or
shorted to ground.