Suzuki GA413, Service Manual

Page: 846 / 1246

6-70 ENGINE GENERAL INFORMATION AND DIAGNOSIS
GA413
supple
STEP ACTION YES NO
6 Check PCV valve for clogging (See Section 6E).
Is it in good condition? Go to Step 7. Replace PCV valve.
7 Check EVAP Canister Purge Valve for Closing.
1) Disconnect purge hose (1) from EVAP canister.
2) Place finger against the end of disconnected hose.
3) Check that vacuum is not felt there, when engine is
cool and running at idle. See Fig. 6.
Is vacuum felt?
Check EVAP control
system
(See Section 6E). Go to Step 8.
8 Check manifold absolute pressure sensor for perfor-
mance (See step 4) DTC P0105 Diag. Flow Table).
Is it in good condition? Go to Step 9. Repair or replace.
9 Check engine coolant temp. sensor for performance
(See Section 6E).
Is it in good condition? Go to Step 10. Replace engine
coolant temp.
sensor.
10 Check parts or system which can cause engine rough idle
or poor performance.
– Engine compression (See Section 6A).
– Valve lash (See Section 6A).
– Valve timing (Timing belt installation. See Section 6A).
Are they in good condition? Check wire harness
and connection of
ECM ground, ignition
system and fuel in-
jector for intermittent
open and short. Repair or replace.
Fig. 1 for Step 3 Fig. 2 for Step 4 Fig. 3 for Step 5
Fig. 4 for Step 4
Fig. 5 for Step 5
Fig. 6 for Step 7
1. Fuel feed hose
2. Fuel pressure gauge & 3 way joint