Suzuki Wagon R Manual page 3218

ENGINE AND EMISSION CONTROL SYSTEM (M13 ENGINE) 6E2-41
Emission Control System
EGR system inspection
1) Connect SUZUKI scan tool to data link connector (DLC) with
ignition switch turn OFF.
2) Turn ON ignition switch and erase DTC using "CLEAR DTC"
in "TROUBLU CODES" menu.
3) Start engine and warm up it to normal operating temperature
then select "DTATA LIST" mode on scan tool.
4) Make sure that vehicle condition is as following.
• Vehicle speed = 0 km/h (0 KPH)
≤
• Engine speed 900 rpm
• Engine coolant temp.
5) With engine idling (without depressing accelerator pedal),
open EGR valve using "STEP EGR" mode in "MISC. TEST"
menu.
In this state, according as EGR valve opening increases
engine idle speed drops. If not, possible cause is clogged
EGR gas passage, stuck or faulty EGR valve.
1. SUZUKI scan tool display
2. EGR valve opening (0: Close, 100: Full Open)
EGR valve removal and installation
Removal
1) Disconnect negative cable at battery.
2) Remove air intake pipe.
3) Remove EGR pipe.
4) Disconnect EGR valve connector.
5) Remove EGR valve and gasket from cylinder head.
Installation
Reverse removal procedure noting following.
• Clean mating surface of valve and cylinder head.
• Use new gaskets.
EGR valve inspection
1) Check resistance between following terminals of EGR valve
(1) in each pair.
If found faulty, replace EGR valve assembly.
EGR valve resistance
Terminal
A – B
C – B
F – E
D – E
≥ 90°C, 164°F
Standard resistance
20 – 24 Ω