Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ACTIVATE THE PURGE VSV CONTROL)
INSPECT PURGE VSV
CHECK PURGE VSV (POWER SOURCE VOLTAGE)
CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)
DTC P0443 Evaporative Emission Control System Purge Control Valve Circuit |
DESCRIPTION
To reduce hydrocarbon emissions, fuel vapor from the fuel tank is routed through a canister to the intake manifold for combustion in the cylinders.The ECM changes the duty signals to the purge VSV (Vacuum Switching Valve) so that the intake amount of hydrocarbon emissions is appropriate for the driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is warmed up.DTC No.
| DTC Detection Condition
| Trouble Area
|
P0443
| Both of the following conditions (a) and (b) are met (1 trip detection logic)
(a) The target control value and actual control value do not match for 10 seconds or more.
(b) The target control value and actual control value do not match for 80 times or more.
| - Open or short in purge VSV circuit
- Purge VSV
- ECM
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
- HINT:
- Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
| 1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ACTIVATE THE PURGE VSV CONTROL) |
Connect the intelligent tester to the DLC3.
Disconnect the charcoal canister side vacuum hose from the purge VSV.
Start the engine.
Turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control.
When the purge VSV is operated using the tester, check whether the port of the purge VSV applies suction to your finger.
- OK:
Tester Operation
| Specified Condition
|
ON (Purge VSV is on)
| Purge VSV port applies suction to finger
|
OFF (Purge VSV is off)
| Purge VSV port applies no suction to finger
|
Reconnect the vacuum hose to the purge VSV.
Inspect the purge VSV (CAMRY_ACV40 RM0000012OE006X.html).
| 3.CHECK PURGE VSV (POWER SOURCE VOLTAGE) |
Disconnect the purge VSV connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection
| Switch Condition
| Specified Condition
|
C6-1 - Body ground
| Ignition switch ON
| 11 to 14 V
|
Text in Illustration*1
| Front view of wire harness connector
(to Purge VSV)
|
Reconnect the purge VSV connector.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - EFI MAIN RELAY) |
|
|
| 4.CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM) |
Disconnect the purge VSV connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for Open):
Tester Connection
| Condition
| Specified Condition
|
C6-2 - C24-49 (PRG)
| Always
| Below 1 Ω
|
- Standard Resistance (Check for Short):
Tester Connection
| Condition
| Specified Condition
|
C6-2 or C24-49 (PRG) - Body ground
| Always
| 10 kΩ or higher
|
Reconnect the purge VSV connector.
Reconnect the ECM connector.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - ECM) |
|
|
