Go to step

CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE)

Wire Harness Side:

® ECM Connector

-s

*

J

MPMP

Front View

Canister Pump Module Connector

MTRB

Front View

MTRB

Front View

(a) Turn the ignition switch OFF.

(b) Disconnect the S3 canister pump module connector.

(c) Disconnect the A9 ECM connector.

(d) Measure the resistance between MPMP terminal of the ECM connector and MTRB terminal of the canister pump module connector.

Result

Test Results

Suspected Trouble Areas

Proceed To

Below 1 Q

ECM

A

10 kQ or higher

Wire harness between ECM and canister pump module

B

(e) Reconnect the canister pump module connector.

(f) Reconnect the ECM connector.

Go to step 34

Go to step 31

INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

(a) Stop the engine.

(b) Disconnect the EVAP hose from the intake manifold.

(c) Start the engine.

(d) Use your finger to confirm that the port of the intake manifold has suction.

Result

Test Results

Suspected Trouble Areas

Proceed To

Suction applied

EVAP hose between intake manifold and purge VSV

A

No suction

Intake manifold

B

(e) Reconnect the EVAP hose.

Go to step 32

Go to step 33

CORRECTLY REINSTALL OR REPLACE FUEL CAP

HINT:

• When reinstalling the fuel cap, tighten it until a few click sounds are heard.

• When replacing the fuel cap, use a fuel cap that meets OEM specifications, and install it until a few click sounds are heard.

nexT>

Go to step 36

REPLACE FUEL CAP

HINT:

When installing the fuel cap, tighten it until a few click sounds are heard.

NEXT>

Go to step 36

LOCATE EVAP LEAK PART

(a) Disconnect the vent hose.

(b) Connect the EVAP pressure tester tool to the canister pump module with the adapter.

(c) Pressurize the EVAP system to 3.2 to 3.7 kPa (24 to 28 mmHg).

(d) Apply soapy water to the piping and connecting parts of the EVAP system.

(e) Look for areas where bubbles appear. This indicates the leak point.

(f) Repair or replace the leak point. HINT:

Disconnect the hose between the canister and the fuel tank from the canister. Block the canister side and conduct an inspection. In this way, the fuel tank can be excluded as an area suspected of causing fuel leaks.

NEXT

Go to step 3e

REPLACE CHARCOAL CANISTER ASSEMBLY

(a) Replace the canister assembly (see page EC-10). NOTICE:

When replacing the canister, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose.

Inspection Area*

Inspection Area*

*: Check for disconnection and/or cracks

A127720E01

NEXT

Go to step 36

REPLACE DUTY VACUUM SWITCHING VALVE (PURGE VSV)

Rav4 Vsv Valve Hose Connection

NEXT>

(a) Disconnect the connector and the hoses from the purge VSV.

(b) Remove the purge VSV.

(c) Install a new purge VSV.

(d) Reconnect the connector and hoses.

NEXT>

Go to step 36

31

REPAIR OR REPLACE HARNESS OR CONNECTOR

nexT>

Go to step 36

32

REPLACE EVAP HOSE (INTAKE MANIFOLD - PURGE VSV)

NEXT>

Go to step 36

33

INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

(a) Check that the EVAP purge port of the intake manifold is not clogged. If necessary, replace the intake manifold.

NEXT

Go to step 36

34

REPLACE ECM

(a) Replace the ECM (see page ES-429).

nexT>

Go to step 36

35

REPAIR OR REPLACE PARTS AND COMPONENTS INDICATED BY OUTPUT DTCS

(a) Repair the malfunctioning areas indicated by the DTCs that had been confirmed when the vehicle was brought in.

NEXT

Go to step 36

PERFORM EVAP SYSTEM CHECK (AUTO OPERATION)

NOTICE:

• The EVAP SYSTEM CHECK (AUTO OPERATION) consists of 5 steps performed automatically by the intelligent tester. It takes a maximum of approximately 18 minutes.

• Do not perform the EVAP SYSTEM CHECK when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable.

• When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing an EVAP SYSTEM CHECK, keep the temperature below 35°C (95°F).

(b) On the intelligent tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.

(c) After the SYSTEM CHECK is completed, check for pending DTCs by selecting the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.

HINT:

If no pending DTCs are found, the repair has been successfully completed.

COMPLETED

CONFIRMATION DRIVING PATTERN

HINT:

After a repair, check Monitor Status by performing the Key-Off Monitor Confirmation and Purge Flow Monitor Confirmation described below. 1. KEY-OFF MONITOR CONFIRMATION

(a) Preconditions

The monitor will not run unless:

• The vehicle has been driven for 10 minutes or more (in a city area or on a freeway)

• The Engine Coolant Temperature (ECT) is between 4.4°C and 35°C (40°F and 95°F)

• The Intake Air Temperature (IAT) is between 4.4°C and 35°C (40°F and 95°F)

• The vehicle remains stationary (the vehicle speed is 0 km/h [0 mph])

(b) Monitor Conditions

1. Allow the engine to idle for at least 5 minutes.

2. Turn the ignition switch OFF and wait for 6 hours (8 or 10.5 hours). HINT:

Do not start the engine until checking MONITOR STATUS. If the engine is started, the steps described above must be repeated.

(c) Monitor Status

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch ON and turn the tester ON.

3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / MONITOR STATUS.

4. Check the Monitor Status displayed on the tester. HINT:

If INCMP is displayed, the monitor is not complete. Make sure that the preconditions have been met, and perform the Monitor Conditions again. 2. PURGE FLOW MONITOR CONFIRMATION (P0441)

HINT:

Perform this monitor confirmation after the Key-Off Monitor Confirmation shows COMPL (complete).

(a) Preconditions

The monitor will not run unless:

• The vehicle has been driven for 10 minutes or more (in a city area or on a freeway)

• The ECT is between 4.4°C and 35°C (40°F and 95°F)

• The IAT is between 4.4°C and 35°C (40°F and 95°F)

(b) Monitor Conditions

1. Release the pressure from the fuel tank by removing and reinstalling the fuel cap.

2. Warm the engine up until the ECT reaches more than 75°C (167°F).

3. Increase the engine speed to 3,000 rpm once.

4. Allow the engine to idle and turn A/C ON for 1 minute.

(c) Monitor Status

1. Turn the ignition switch OFF (if ON or the engine is running).

2. Connect the intelligent tester to the DLC3.

3. Turn the ignition switch ON and turn the tester ON.

4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / MONITOR STATUS.

5. Check the Monitor Status displayed on the tester. HINT:

If INCMP is displayed, the monitor is not complete. Make sure that the preconditions have been met, and perform the Monitor Conditions again.

MONITOR RESULT

Refer to CHECKING MONITOR STATUS (See page ES-17).

ECM Power Source Circuit

DESCRIPTION

When the ignition switch is turned ON, the battery voltage is applied to the IGSW of the ECM. The output signal from the MREL terminal of the ECM causes a current to flow to the coil, closing the contacts of the integration relay (EFI MAIN relay) and supplying power to either terminal +B or +B2 of the ECM.

WIRING DIAGRAM

Ignition Switch

Ignition Switch

2001 Rav4 Evap System

A127273E01

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Do It Yourself Car Diagnosis

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