Suzuki GRAND VITARA XL-7 Owner's Manual page 260

1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool.
3) Start engine and warm up it completely.
4) Increase vehicle speed to 55 km/h (35 mph) or more.
5) Keep driving above vehicle speed for 20 min or more (Change of vehicle speed is permitted in this step).
6) Release accelerator pedal, stop vehicle and run engine at speed for 2 min.
7) Check DTC and pending DTC by using scan tool.
TROUBLESHOOTING
Step
1 Was "ENGINE DIAG. FLOW TABLE" per-
formed?
2 Check EVAP canister purge system for opera-
tion referring to "EVAP CANISTER PURGE
SYSTEM INSPECTION" in this section.
Is check result satisfactory?
3 Check EVAP canister purge valve for resistance
referring to "EVAP CANISTER PURGE VALVE
INSPECTION" in this section.
Is resistance as specified?
ENGINE GENERAL INFORMATION AND DIAGNOSIS (H27 ENGINE) 6-1-99
Action Yes
Go to Step 2.
Intermittent trouble or
faulty ECM (PCM).
Check for intermittent
referring to "INTERMIT-
TENT AND POOR CON-
NECTION" in Section 0A.
"GRN/BLK" or "BLU/BLK"
circuit open or short.
If wire and connections
are OK, substitute a
known-good ECM (PCM)
and recheck.
No
Go to "ENGINE DIAG.
FLOW TABLE" in this
section.
Go to Step 3.
Replace EVAP canister
purge valve.