DTC P0443 / P0458 / P0459
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P0443: Evaporative Emission System Purge Control Valve Circuit EVAP canister purge valve drive circuit is open with engine running. (3 D/C detection logic) |
•EVAP canister purge valve and/or its circuit
•ECM |
|
P0458: Evaporative Emission System Purge Control Valve Circuit Low EVAP canister purge valve drive circuit is shorted to ground with engine running. (3 D/C detection logic) |
|
|
P0459: Evaporative Emission System Purge Control Valve Circuit High EVAP canister purge valve drive circuit is shorted to power supply with engine running. (3 D/C detection logic) |
Circuit Diagram
| [A]: | ECM connector (View: [a]) | B1: | EVAP canister purge valve drive circuit | 2. | To main relay |
| A1: | EVAP canister purge valve power supply circuit | 1. | EVAP canister purge valve | 3. | ECM |
DTC Confirmation Procedure
NOTE:
Check that the following condition is met in this “DTC Confirmation Procedure”.
•Battery voltage > 8.5 V
1)Run engine at idle speed for 1 min.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
EVAP canister purge valve power supply circuit check
1)With ignition “OFF”, disconnect EVAP canister purge valve connector.
2)Check for proper terminal connection to EVAP canister purge valve connector.
3)If connection is OK, set ignition “ON”.
4)Check that voltage between “A1” and ground is battery voltage.
Is check result OK?
|
Go to Step 3.
|
Repair or replace defective wire harness.
|
| 3 |
EVAP canister purge valve drive circuit check
1)With ignition “OFF”, disconnect “C01” and “E01” connectors of ECM.
2)Check for proper terminal connection to “C01” and “E01” connectors.
3)If connections are OK, check the following points.
•Resistance of “B1” circuit: less than 1 Ω
•Resistance between “B1” circuit and ground: infinity •Resistance between “A1” circuit terminal and “B1” circuit terminal at EVAP canister purge valve connector: infinity •Voltage of “B1” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 4.
|
Repair or replace defective wire harness.
|
| 4 |
EVAP canister purge valve check
1)Check EVAP canister purge valve for resistance.
Is check result OK?
|
Replace ECM and recheck DTC.
|
Replace EVAP canister purge valve.
|