X-90 (4WD) L4-1591cc 1.6L SOHC MFI (1998)
EGR Control Solenoid: Testing and Inspection
EGR Solenoid Vacuum Valve (For System Check)
1) Disconnect vacuum hoses from pipes.
2) Blow into pipe "A" with ignition switch ON. Air should come out of pipe "B" and not out of pipe "C". If not, proceed to step 4).
Using SUZUKI scan tool
3) Connect SUZUKI scan tool to DLC and connect vacuum hoses.
3-1) Warm up and stop engine.
3-2) Disconnect vacuum noses from pipes.
3-3) Turn ON EGR solenoid vacuum valve (for system check) by using SUZUKI scan tool with ignition switch ON.
In this state, blow pipe "A". Air should come out of pipe "C" and not out of pipe "B". If check results are as describe above, EGR solenoid
vacuum valve (for system check) and its circuit are in good condition.
If not, proceed to step 4).
Not using SUZUKI scan tool
3) Using service wire, connect E34-18 terminal of ECM coupler and body ground with ignition switch OFF.