Exhaust Gas Recirculation: Testing and Inspection

EGR SYSTEM INSPECTION (USING SUZUKI SCAN TOOL)




1. Connect SUZUKI scan tool to data link connector (DLC) (1) with ignition switch OFF

Special tool
A: 09931 - 76011
B: Mass storage cartridge
C: 09931 - 76030

NOTE: For operation procedure of cartridge, refer to its cartridge operator's manual.

2. Start engine and warm up it to normal operating temperature.




3. With engine idling (without depressing accelerator pedal), open EGR valve by using "MISC. TEST" mode.

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.

INSPECTION




1. Check resistance between following terminals of EGR valve (1) in each pair.
If found faulty, replace EGR valve assembly.
2. Remove carbon from EGR valve gas passage.

NOTE: Do not use any sharp-edged tool to remove carbon. Be careful not to damage or bend EGR valve, valve seat and rod.




3. Inspect valve (2), valve seat (3) and rod for fault, cracks bend or other damage.
If found faulty, replace EGR valve (1) assembly.