P0449

DTC P0449

DTC Detecting Condition and Trouble Area






Circuit Diagram










DTC Confirmation Procedure

WARNING:

If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.

- Select a level road with no traffic to minimize the risk of accident.
- Perform the test extremely carefully.
- Perform the road test using 2 persons, a driver and an assistant.

1) Warm up engine to normal operating temperature.
2) Drive vehicle at 40 km/h (25 mile/h) for 15 min.
3) Push engine switch to change ignition mode to "OFF" and leave ignition mode in "OFF" for 5 hours.

DTC Troubleshooting



1. Was "Engine and Emission Control System Check" performed?
YES
Go to Step 2.
NO
Go to Engine and Emission Control System Check Engine and Emission Control System Check.
2. EVAP vent valve power supply circuit check
Confirm that ignition mode of keyless push start system is in "OFF".
Disconnect connector from EVAP leak check module.
Check for proper terminal connection to EVAP leak check module.
If connections are OK, check that voltage is battery voltage between "A1" circuit and ground with ignition mode of keyless push start system in "ON".
Is it in good condition?
YES
Go to Step 3.
NO
Repair or replace defective wire harness.
3. EVAP vent valve drive circuit check
Push engine switch to change ignition mode to "OFF".
Disconnect "C01" and "E01" connectors.
Check for proper terminal connection to "C01" and "E01" connectors.
If connections are OK, check the following points.
Resistance of "A2" circuit: less than 1
Resistance of "A2" circuit between EVAP leak check module connector and ground: infinity
Resistance between "A2" circuit terminal and each terminal at EVAP leak check module connector: infinity
Voltage of "A2" circuit: 0 - 1 V (with ignition mode of keyless push start system in "ON")
Are they in good condition?
YES
Go to Step 4.
NO
Repair or replace defective wire harness.
4. EVAP vent valve check
Check EVAP vent valve coil resistance referring "EVAP Canister Vent Valve On-Vehicle Inspection" under EVAP Leak Check Module Inspection EVAP Leak Check Module Inspection.
Is it in good condition?
YES
Replace ECM and recheck DTC. Service and Repair
NO
Replace EVAP leak check module. Service and Repair