Dtc P0403: Exhaust Gas Recirculation Control Circuit - Suzuki Grand Vitara 2011 Manual

1A-143 Engine General Information and Diagnosis: For Petrol Engine Model

DTC P0403: Exhaust Gas Recirculation Control Circuit

Wiring Diagram
Refer to "DTC P0401 / P0402: Exhaust Gas Recirculation Flow Insufficient Detected / Excessive Detected: For Petrol
Engine Model".
DTC Detecting Condition and Trouble Area
DTC detecting condition
Monitored voltage of EGR valve drive pulse is different from its output
command with more than one pole out of 4 poles.
(1 driving cycle detection logic)
DTC Confirmation Procedure
WARNING
!
• When performing a road test, select a place where there is no traffic or possibility of a traffic
accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out by 2 persons, a driver and a tester, on a level road.
1) With ignition switch turned OFF, connect scan tool to DLC.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and warm it up to normal operating temperature.
4) Drive vehicle in 2000 – 3500 rpm of engine speed.
5) Keep above vehicle speed for 1 min. (Throttle valve opening is kept constant in this step.)
6) Stop vehicle and check DTC and pending DTC.
DTC Troubleshooting
NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
"Precautions for DTC Troubleshooting: For Petrol Engine Model".
Step
1 Was "Engine and Emission Control System Check"
performed?
2 EGR valve power supply circuit check
1) With ignition switch turned OFF, disconnect EGR valve
connector.
2) With ignition switch turned ON, measure voltage
between "BLU/BLK" wire terminal of EGR valve
connector and vehicle body ground.
Is check voltage 10 – 14 V?
3 Wire circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Turn ON ignition switch.
3) Measure voltage between engine ground and each
"YEL/BLK", "YEL/RED", "YEL/GRN", "YEL" wire
terminals of EGR valve connector.
Is each voltage 0 V?
Action
Trouble area
• EGR valve circuit open
• EGR valve
• ECM
Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
S6JB0A1114045
No
Go to "Engine and
Emission Control
System Check: For
Petrol Engine Model".
"BLU/BLK" wire is open
circuit.
Faulty wire(s) are
shorted to other circuit.
If wires are OK,
substitute a known-
good ECM and recheck.