| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VIBY |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 08/2016] |
| Title: 2GR-FE (ENGINE CONTROL): SFI SYSTEM: Active Control Engine Mount System; 2016 MY Sienna [12/2015 - 08/2016] | ||
|
Active Control Engine Mount System |
DESCRIPTION
LOCATION
The active control engine mount system decreases engine vibration at a low engine speed using the duty vacuum switching valve. The duty vacuum switching valve is controlled by a pulse signal transmitted to the duty vacuum switching valve from the ECM. The frequency of this pulse signal is matched to the engine speed to decrease engine vibration.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
CHECK VACUUM HOSES |
|
(a) If the hose is damaged, replace the vacuum hose assembly. |
|
(b) Check the air and vacuum hoses for looseness, disconnection and blockage.
OK:
No looseness, disconnection or blockage.
Text in Illustration
|
*1 |
Engine |
|
*2 |
Duty Vacuum Switching Valve |
|
*3 |
Front Engine Mounting Insulator Assembly |
|
*4 |
ECM |
|
*5 |
Air Cleaner Filter Element Sub-assembly |
|
*6 |
Vacuum Tank |
|
*a |
to Intake Air Control Valve |
| NG |
|
REPAIR OR REPLACE VACUUM HOSES |
|
|
2. |
CHECK VACUUM |
|
(a) Start the engine. |
|
(b) Disconnect the vacuum hose from the air cleaner cap.
(c) Check that the disconnected port located on the vacuum tank applies suction to your finger.
OK:
Vacuum exists.
| NG |
|
CHECK AND REPLACE VACUUM SOURCE AND HOSES |
|
|
3. |
INSPECT DUTY VACUUM SWITCHING VALVE (OPERATION) |
(a) Inspect the duty vacuum switching valve (See page
![2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): VACUUM SWITCHING VALVE(for Engine Mounting): INSPECTION](/t3Portal/stylegraphics/info.gif)
).
| NG |
|
|
|
4. |
INSPECT DUTY VACUUM SWITCHING VALVE (RESISTANCE) |
(a) Inspect the duty vacuum switching valve (See page
).
| NG |
|
|
|
5. |
INSPECT FRONT ENGINE MOUNTING INSULATOR ASSEMBLY (VACUUM LEAK) |
(a) Inspect the front engine mounting insulator assembly (See page
).
| NG |
|
|
|
6. |
INSPECT DUTY VACUUM SWITCHING VALVE (POWER SOURCE VOLTAGE) |
|
(a) Disconnect the duty vacuum switching valve connector. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A64-1 - Body ground |
Ignition switch ON |
11 to 14 V |
Text in Illustration
|
*a |
Front view of wire harness connector (to Duty Vacuum Switching Valve) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 2 FUSE - DUTY VACUUM SWITCHING VALVE) |
|
|
7. |
CHECK HARNESS AND CONNECTOR (DUTY VACUUM SWITCHING VALVE - ECM) |
(a) Disconnect the A64 duty vacuum switching valve connector.
(b) Disconnect the B1 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A64-2 - B1-83 (ACM) |
Always |
Below 1 Ω |
|
A64-2 or B1-83 (ACM) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|