Suzuki GA413, Service Manual

Page: 456 / 1246

6E-46 ENGINE AND EMISSION CONTROL SYSTEM
TABLE B-5 EVAPORATIVE EMISSION CONTROL SYSTEM CHECK
SYSTEM AND WIRING DIAGRAM
1. Fuel tank
2. EVAP canister
3. EVAP canister purge valve
4. EVAP canister purge valve connector
5. To intake manifold
6. ECM connector (A)
7. ECM connector (B)
8. ECM
9. Power supply from main relay
SYSTEM DESCRIPTION
ECM transmits duty signal to EVAP canister purge valve.
INSPECTION
STEP ACTION YES NO
1 Did you perform “ENGINE DIAGNOSTIC FLOW
TABLE” in Section 6?
Go to Step 2. Go to “ENGINE DIAG-
NOSTIC FLOW TABLE”.
2 1) Perform the following inspections.
“EVAP System Hose and Pipes”
“EVAP Canister Purge Valve”
“EVAP Canister”
Are they in good condition?
Go to Step 3. Repair or replace.
3 1) Disconnect EVAP hose.
2) Start engine and run it at idle.
3) Place your thumb over end of hose in order to
check for vacuum.
Is vacuum felt?
Faulty “G/Y” wire.
If OK, substitute a
known-good ECM and
recheck.
Go to Step 4.
4 1) Turn ignition switch OFF position.
2) Disconnect ECM connectors.
3) Measure resistance between “A1” to “B5” of
ECM connectors.
Is resistance within 30-34 at 20 C (68 F)?
Poor connection.
If OK, substitute a
known-good ECM and
recheck.
Faulty “B/R”, “G/Y” wire.
Poor connection of
EVAP canister purge
valve connector.