Note. Before performing any DIAGNOSTIC TEST, refer toWARNINGS, CAUTIONS and NOTES in DIAGNOSTIC TESTS .
Note. Testing individual components does not isolate shorts or opens. Perform all voltage tests using a Digital Volt-Ohmmeter Meter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use ohmmeter to isolate wiring harness shorts or opens.
Diagnostic Aids
Malfunction code is set when internal pressure of fuel tank changes more than 100mm/Ag in 20 seconds, after tank and vapor line are close. Check for following possible problems
- Fuel filler cap loose or missing.
- Fuel filler cap "O" ring missing or damaged.
- Faulty or damaged fuel filler pipe.
- Leaking, disconnected or plugged fuel vapor lines.
- Fuel in lines due to faulty rollover valve or On-board Refueling Vapor Recovery (ORVR) valve.
- Improperly installed EVAP Canister Purge Control Solenoid Valve (PCSV).
- PCVS valve stuck open or closed.
- Leaking EVAP canister or catch tank.
- Faulty Diagnostic Module Tank Leakage (DMTL) solenoid valve.
- Faulty LDM.