DTC P0443: Evaporative Emission Control System Purge Control Valve Circuit: Procedure

WARNING: This page is about a different car, the 2010 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTIVE TEST USING TECHSTREAM

Disconnect the vacuum hose from the VSV for EVAP.

Fig 1: View Of VSV ON / OFF
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Connect the Techstream to the DLC3.
Start the engine and turn the Techstream on.
Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Evap Control. Press the right or left button.

Check if air is sucked into the port when operating the VSV for EVAP using the in TECHSTREAM.

Standard

Tester Operation	Specified Condition
VSV is OFF	No air sucked

Result

Result	Proceed to
NG	A
OK	B

Reconnect the vacuum hose.

B → See step 6

A: Go to next step

INSPECT PURGE VSV

Disconnect the purge VSV connector.

Fig 2: Inspecting Purge VSV
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance between the terminals of the purge VSV.

Standard resistance

Tester Connection	Condition	Specified Condition
1 - 2	20°C (68°F)	23 to 26 Ω

Reconnect the purge VSV connector.

NG → See step 7

OK: Go to next step

INSPECT PURGE VSV (POWER SOURCE VOLTAGE)

Disconnect the purge VSV connector.

Fig 3: View Of Purge VSV Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Turn the ignition switch to ON.

Measure the voltage between the terminal of the wire harness side connector and body ground.

Standard voltage

Tester Connection	Condition	Specified Condition
C6-1 (Purge VSV) - Body ground	Ignition switch ON	11 to 14 V

Reconnect the purge VSV connector.

NG → CHECK HARNESS AND CONNECTOR (PURGE VSV - ENGINE RELAY BLOCK)

OK: Go to next step

CHECK HARNESS AND CONNECTOR (ECM - PURGE VSV)

Disconnect the purge VSV connector.

Fig 4: Checking Harness & Connector (ECM - Purge VSV)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the ECM connector.

Measure the resistance between the terminals.

Standard resistance (Check for open)

Tester Connection	Condition	Specified Condition
C6-2 (Purge VSV) - C55-108 (PRG)	Always	Below 1 Ω

Standard resistance (Check for short)

Tester Connection	Condition	Specified Condition
C6-2 (Purge VSV) or C55-108 (PRG) - Body ground	Always	10 kΩ or higher

Reconnect the ECM connector.
Reconnect the purge VSV connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - PURGE VSV)

OK → See step 5

REPLACE ECM. Refer to REMOVAL
CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS
REPLACE VACUUM SWITCHING VALVE (PURGE VSV). Refer to REMOVAL