ENGINE AND EMISSION CONTROL SYSTEM
6E1-37
B-5 EVAPORATIVE EMISSION CONTROL SYSTEM CHECK
1. To throttle body
2. To fuel tank
3. EVAP canister
4. Air
5. Air and vapor
6. EVAP canister purge valve
7. Main relay
8. Sensed information
9. ECM
10. Fuel tank
STEP
ACTION
YES
NO
1
Check canister purge system for opera-
tion referring to p.6E1-73.
Is it in good condition?
Check EVAP canister referring to
p.6E1-76 and fuel filler cap referring
to Section 6C.
If OK, system is in good condition.
Go to Step 2.
2
Check vacuum passage, hoses and
EVAP canister purge valve referring to
p.6E1-74.
Are they in good condition?
“O/Y” wire open,
“O/Y” wire shorted to ground,
Poor EVAP canister purge valve
coupler connection,
Poor “E32-307” connection,
Poor performance of ECT sensor
or MAP sensor or TP sensor
If none of the above exists, substi-
tute a known-good ECM and re-
check.
Vacuum passage
clogged,
Vacuum leakage or
Faulty EVAP canister
purge valve