Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000YZ5I
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 -           ]
Title: BRAKE SYSTEM (OTHER): VACUUM PUMP: ON-VEHICLE INSPECTION; 2017 - 2020 MY Sienna [08/2016 -        ]

ON-VEHICLE INSPECTION

PROCEDURE

1. REMOVE WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY

Click here 2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: FRONT WIPER MOTOR: REMOVAL

2. REMOVE FRONT OUTER COWL TOP PANEL SUB-ASSEMBLY

Click here 2016 - 2020 MY Sienna [12/2015 -        ]; FRONT SUSPENSION: FRONT SHOCK ABSORBER: REMOVAL+

3. OPERATION CHECK

(a) Slide the clip and disconnect the air tube from the vacuum pump assembly.

(b) Connect the hose of the vacuum gauge to the vacuum pump assembly.

*a

Vacuum Gauge

*b

Plug

(c) Start the engine and warm it up for more than 2 minutes.

(d) With the engine idling, check the vacuum of the vacuum pump assembly.

Standard Pressure:

More than 86.7 kPa (650 mmHg, 25.6 in.Hg)

If necessary, replace the vacuum pump assembly.

HINT:

Always perform this operation check procedure after replacing the vacuum pump assembly.

(e) Remove the vacuum gauge from the vacuum pump assembly.

(f) Connect the air tube to the vacuum pump assembly, and slide the clip to secure it.

4. INSTALL FRONT OUTER COWL TOP PANEL SUB-ASSEMBLY

Click here 2016 - 2020 MY Sienna [12/2015 -        ]; FRONT SUSPENSION: FRONT SHOCK ABSORBER: INSTALLATION+

5. INSTALL WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY

Click here 2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: FRONT WIPER MOTOR: INSTALLATION