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Note

• Perform the procedure when the AdBlue® temperature in the urea tank is -9 °C {16 °F} or more.

• Wipe off any AdBlue® liquid around the area as the crystals separate from the liquid as it dries.

• Dispose of any waste AdBlue® according to local disposal laws.

• When performing the following inspections, perform the “AdBlue® Injection Amount Inspection” first. (See AdBlue® Injection Amount Inspection.)

AdBlue® Injection Amount Inspection

1.Remove the injector leaving the connector and quick release connector connected. (See UREA INJECTOR REMOVAL/INSTALLATION [MZR-CD 2.2].)

2.Prepare a container to collect the AdBlue® and weigh the container.

Note

• The container weight is necessary for calculating the AdBlue® injection amount.

3.Set the urea injector into the container.

Note

• Do not remove the urea injector from the container during the test.

4.Connect the M-MDS to DLC-2.

5.After the vehicle is identified, select the following items from the initial screen of the M-MDS.

When using the IDS (laptop PC)

1. Select the “Powertrain”.

2. Select the “SCR System”.

3. Select the “Urea Injector Test”.

6.Perform the procedure according to the directions on the screen.

• If the urea pump pressure is not within the specification and the AdBlue® injection stops during the test, perform the following procedure:

1. Perform the “AdBlue® Leakage Inspection”. (See AdBlue® Leakage Inspection.)

2. Perform the “Urea Pump Inspection”. (See Urea Pump Inspection.)

3. Re-perform the “AdBlue® Injection Amount Inspection”. (See AdBlue® Injection Amount Inspection.)

• If the urea pump pressure exceeds the specification and the AdBlue® injection stops during the test, perform the following procedure:

1. Replace the urea pump, urea tank component. (See UREA TANK REMOVAL/INSTALLATION [MZR-CD 2.2].)

2. Re-perform the “AdBlue® Injection Amount Inspection”. (See AdBlue® Injection Amount Inspection.)

7.After finishing the test, measure the amount of AdBlue® in the container and calculate the AdBlue® injection amount.

AdBlue® injection amount = Weight of container with AdBlue® minus container weight

• If not within the specification, perform the “Urea Pump Inspection (With Urea Hose)” and perform the following procedure:

― If it is normal:

1. Replace the urea injector. (See UREA INJECTOR REMOVAL/INSTALLATION [MZR-CD 2.2].)

2. Re-perform the “AdBlue® Injection Amount Inspection”. (See AdBlue® Injection Amount Inspection.)

― If there is any malfunction:

1. Perform the “Urea Pump Inspection”. (See Urea Pump Inspection.)

2. Re-perform the “AdBlue® Injection Amount Inspection”. (See AdBlue® Injection Amount Inspection.)

8.Install the urea injector. (See UREA INJECTOR REMOVAL/INSTALLATION [MZR-CD 2.2].)

Urea Pump Inspection (With Urea Hose)

1.Disconnect the quick release connector on the urea injector-side. (See QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION [MZR-CD 2.2].)

2.Prepare a container to collect the AdBlue® and weigh the container.

Note

• The container weight is necessary for calculating the AdBlue® discharge amount.

3.Set the urea hose into the container.

4.Connect the M-MDS to DLC-2.

5.After the vehicle is identified, select the following items from the initial screen of the M-MDS.

When using the IDS (laptop PC)

1. Select the “Powertrain”.

2. Select the “SCR System”.

3. Select the “Urea Pump Test”.

6.Perform the procedure according to the directions on the screen.

7.After finishing the test, measure the amount of AdBlue® in the container and calculate the AdBlue® discharge amount.

AdBlue® discharge amount = Weight of container with AdBlue® minus container weight

• If it is not within the specification, perform the following procedure:

1. Perform the “Urea Pump Inspection”. (See Urea Pump Inspection.)

2. Re-perform the “Urea Pump Inspection (With Urea Hose)”. (See Urea Pump Inspection (With Urea Hose).)

8.Connect the quick release connector on the urea injector-side. (See QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION [MZR-CD 2.2].)

Urea Pump Inspection

1.Disconnect the quick release connector on the urea tank-side. (See QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION [MZR-CD 2.2].)

2.Install the vinyl tube to the discharge outlet of the urea pump.

3.Prepare a container to collect the AdBlue® and weigh the container.

Note

• The container weight is necessary for calculating the AdBlue® discharge amount.

4.Set the vinyl tube into the container.

5.Connect the M-MDS to DLC-2.

6.After the vehicle is identified, select the following items from the initial screen of the M-MDS.

When using the IDS (laptop PC)

1. Select the “Powertrain”.

2. Select the “SCR System”.

3. Select the “Urea Pump Test”.

7.Perform the procedure according to the directions on the screen.

8.After finishing the test, measure the amount of AdBlue® in the container and calculate the AdBlue® discharge amount.

AdBlue® discharge amount = Weight of container with AdBlue® minus container weight

• If not within the specification, replace the urea pump and re-measure the AdBlue® discharge amount. (Re-perform from Step 2) (See UREA PUMP REMOVAL/INSTALLATION [MZR-CD 2.2].)

― If the AdBlue® discharge amount is not within the specification, even if the amount is re-measured after replacing the urea pump, replace the urea pump and urea tank component (possibility of urea tank internal malfunction) (See UREA TANK REMOVAL/INSTALLATION [MZR-CD 2.2]).

• If within the specification, visually inspect the urea hose and perform the following procedure:

― If there is AdBlue® leakage:

1. Replace the urea hose.

― If there is no AdBlue® leakage:

1. Clean the inside of the urea hose. (See Cleaning of internal urea hose.)

2. Perform the “Urea Pump Inspection (With Urea Hose)”. If there is any malfunction, replace the urea hose. (See Urea Pump Inspection (With Urea Hose).)

9.Connect the quick release connector on the urea tank-side. (See QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION [MZR-CD 2.2].)

Cleaning of internal urea hose

1.Disconnect the quick release connectors. (See QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION [MZR-CD 2.2].)

2.Install the tube to the air gun nozzle or a water faucet.

3.Insert the tube past the O-ring in the quick release connector.

Caution

• Be careful when performing this step so that the O-ring does not become damaged.

4.Apply positive pressure and clean the inside of the urea hose.

Caution

• Do not apply positive pressure of 1 MPa {10 kgf/cm ², 145 psi} or more to the urea hose.

• Do not allow high pressure air or water to contact the O-ring of the urea hose.

5.Verify that the O-ring is not damaged or it has not slipped.

• If there is any malfunction, replace the urea hose.

6.Connect the quick release connectors. (See QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION [MZR-CD 2.2].)

AdBlue® Leakage Inspection

1.Connect the M-MDS to DLC-2.

2.After the vehicle is identified, select the following items from the initial screen of the M-MDS.

When using the IDS (laptop PC)

1. Select the “Powertrain”.

2. Select the “SCR System”.

3. Select the “Urea Hose Leak Test”.

3.Perform the procedure according to the directions on the screen.

• If AdBlue® leaks from the urea hose during the test, perform the following procedure:

1. Replace the urea hose.

• If the pressure is not within the specification during the test, perform the following procedure:

1. Perform the “Urea Pump Inspection (With Urea Hose)”. (See Urea Pump Inspection (With Urea Hose).)

2. Re-perform the “AdBlue® Leakage Inspection”. (See AdBlue® Leakage Inspection.)