Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Read freeze frame data using a Techstream. Freeze frame data record the engine condition when malfunctions are detected. 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.

PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR EVAP CONTROL)

Connect a Techstream to the DLC3.
Disconnect the vacuum hose (canister side) from the purge VSV.
Start the engine.
Turn the tester ON.
Select the following menu items: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control.

When the purge VSV is operated using the Techstream, check whether the port of the purge VSV applies suction to your finger.

OPERATION CHART

Tester Operations	Specified Conditions
VSV ON	Purge VSV port applies suction to finger
VSV OFF	Purge VSV port applies no suction to finger

Fig 1: Identifying Purge VSV And Hose

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Reconnect the vacuum hose to the purge VSV.

NG: Go to step 2

OK: CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT PROBLEMS )

INSPECT PURGE VSV (RESISTANCE)

Disconnect C3 purge VSV connector.

Fig 2: Identifying Purge VSV Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
1 - 2	23 to 26 Ω at 20°C (68°F)

Reconnect the purge VSV connector.

NG: REPLACE PURGE VSV (See REMOVAL )

OK: Go to next step

INSPECT PURGE VSV (POWER SOURCE)

Disconnect the C3 purge VSV connector.

Fig 3: Inspecting Purge VSV (Power Source)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.

Standard Voltage

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
C3-2 - Body ground	11 to 14 V

Reconnect the purge VSV connector.

NG: Go to step 5

OK: Go to next step

CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

Disconnect the C3 purge VSV connector.

Fig 4: Identifying Purge VSV And ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the C20 ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
C3-1 - C20-49 (PRG)	Below 1 Ω

Standard Resistance (Check for short)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
C3-1 or C20-49 (PRG) - Body ground	10 kΩ or higher

Reconnect the purge VSV connector.
Reconnect the ECM connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE ECM (See REMOVAL )

CHECK HARNESS AND CONNECTOR (PURGE VSV - INTEGRATION RELAY)

Disconnect the C3 purge VSV connector.

Fig 5: Identifying Integration Relay And Purge VSV Connector Terminals

Remove the integration relay from the engine room relay block.

Check the resistance.

Standard Resistance (Check for open)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
C3-2 - EFI relay (1A-4)	Below 1 Ω

Standard Resistance (Check for short)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
C3-2 or EFI relay (1A-4) - Body ground	10 kΩ or higher

Reconnect the purge VSV connector.
Reinstall the integration relay.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT (See ECM POWER SOURCE CIRCUIT )