EGR System Test (Swift Federal)
- To check system operation, place transaxle in Park (A/T) or Neutral (M/T). Apply parking brake.
- With coolant temperature less than 122°F (50°C) on DOHC models, or 104°F (40°C) on SOHC models, start engine and operate at high RPM. EGR valve diaphragm should not retract.
- Warm engine to normal operating temperature. Operate engine at high RPM. EGR valve diaphragm should retract.
- If EGR valve does not operate as specified, check for misrouted, restricted, clogged or deteriorated vacuum hoses. If vacuum hoses are okay, check EGR valve and EGR modulator. See EGR VALVE and EGR MODULATOR. See Fig 1
or Fig 2
.
- If EGR valve and EGR modulator are okay, check EGR Vacuum Switching Valve (VSV). See EGR VACUUM SWITCHING VALVE (VSV).
- If VSV is okay, check wiring and ECM. ECM will set a Code 51 if EGR system failure is present. See appropriate TESTS W/CODES
article for system diagnosis.
- To check for clogged EGR passages, allow engine to idle. Manually open EGR valve. Engine RPM should decrease. If engine speed does not decrease, check for clogged EGR passages.
Courtesy of SUZUKI OF AMERICA CORP.
Courtesy of SUZUKI OF AMERICA CORP.