Active Control Engine Mount System [06/2017 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Active Test / Activate the ACM Inhibit.

   Powertrain > Engine > Active Test 

   Tester Display
   Activate the ACM Inhibit

5. According to the display on the Techstream, perform the Active Test to operate the vacuum switching valve (for active control engine mount system) and for check the operating sound of the vacuum switching valve (for active control engine mount system).

   OK

   Operating sounds can be heard.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  6

Result: 

OK 

See step  2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the air and vacuum hoses for looseness, disconnection and blockage.

   OK

   No looseness, disconnection or blockage.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE VACUUM HOSES 

Result: 

OK 

See step  3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the vacuum hose from the vacuum pump assembly.
2. Start the engine.
3. Check that the disconnected port located on the vacuum pump assembly applies suction to your finger.

   OK

   Vacuum exists.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE VACUUM PUMP ASSEMBLY. Refer to  REMOVAL [06/2017 - ] 

Result: 

OK 

See step  4

1. Inspect the front engine mounting insulator.

   Refer to ON-VEHICLE INSPECTION [06/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT ENGINE MOUNTING INSULATOR. Refer to  REMOVAL [06/2017 - ] 

Result: 

OK 

See step  5

1. Inspect the rear engine mounting insulator.

   Refer to ON-VEHICLE INSPECTION [06/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

SYSTEM NORMAL 

Result: 

NG 

REPLACE REAR ENGINE MOUNTING INSULATOR. Refer to  REMOVAL [06/2017 - 08/2018]  , or refer to  REMOVAL [08/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 08/2022]  , or refer to  REMOVAL [08/2022 - ] 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the vacuum switching valve (for active control engine mount system) connector.
2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   C14-1 (+B) - Body ground	Engine switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO ECM POWER SOURCE CIRCUIT. Refer to  ECM Power Source Circuit [06/2017 - ] 

Result: 

OK 

See step  7

1. Inspect the vacuum switching valve (for active control engine mount system).

   Refer to INSPECTION [06/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE VACUUM SWITCHING VALVE (FOR ACTIVE CONTROL ENGINE MOUNT SYSTEM). Refer to  REMOVAL [06/2017 - ] 

Result: 

OK 

See step  8

1. Disconnect the vacuum switching valve (for active control engine mount system) connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C14-2 (ACM) - C96-39 (ACM)	Always	Below 1 Ω
   C14-2 (ACM) or C96-39 (ACM) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [06/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - 08/2022]  , or refer to  REMOVAL [08/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR