Active Control Engine Mount System [10/2022 - ]: Procedure

1. According to the display on the GTS, perform the Active Test to operate the No. 1 vacuum switching valve (for active control engine mount system) and for check the operating sound of the No. 1 vacuum switching valve (for active control engine mount system).

   Powertrain > Engine > Active Test 

   Tester Display
   Activate the ACM Inhibit

   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 [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

Result: 

OK 

See step  4

1. Inspect the front engine mounting insulator.

   Refer to ON-VEHICLE INSPECTION [10/2022 - ]

   Result

   Result	Proceed to
   OK (for 2WD)	A
   OK (for AWD)	B
   NG	C

Result: 

B 

SYSTEM NORMAL 

Result: 

C 

REPLACE FRONT ENGINE MOUNTING INSULATOR 

Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

Result: 

A 

See step  5

1. Inspect the rear engine mounting insulator.

   Refer to ON-VEHICLE INSPECTION [10/2022 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

SYSTEM NORMAL 

Result: 

NG 

REPLACE REAR ENGINE MOUNTING INSULATOR 

Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

1. Disconnect the No. 1 vacuum switching valve (for active control engine mount system) connector.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to No. 1 Vacuum Switching Valve (for Active Control Engine Mount System))

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   C12-1 (+B) - Body ground	Ignition switch ON	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  9

Result: 

OK 

See step  7

1. Inspect the No. 1 vacuum switching valve (for active control engine mount system).

   Refer to INSPECTION [10/2022 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE NO. 1 VACUUM SWITCHING VALVE (FOR ACTIVE CONTROL ENGINE MOUNT SYSTEM) 

Refer to REMOVAL [10/2022 - ]

Result: 

OK 

See step  8

1. Disconnect the No. 1 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
   C12-2 (ACM) - C89-14 (ACM)	Always	Below 1 Ω
   C12-2 (ACM) or C89-14 (ACM) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM 

Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Inspect the EFI-MAIN NO. 3 relay.

   Refer to PROCEDURE - Step 5 [10/2022 - 11/2023] , or refer to PROCEDURE - Step 5 [11/2023 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE EFI-MAIN NO. 3 RELAY 

Result: 

OK 

See step  10

1. Remove the EFI-MAIN NO. 3 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
   *2	EFI-MAIN NO. 3 relay

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   3 (EFI-MAIN NO. 3 relay) - Body ground	Always	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - EFI-MAIN NO. 3 RELAY) 

Result: 

OK 

See step  11

1. Remove the EFI-MAIN NO. 3 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 (EFI-MAIN NO. 3 relay) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  12

1. Remove the EFI-MAIN NO. 3 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
2. Disconnect the No. 1 vacuum switching valve (for active control engine mount system) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   5 (EFI-MAIN NO. 3 relay) - C12-1 (+B)	Always	Below 1 Ω
   5 (EFI-MAIN NO. 3 relay) or C12-1 (+B) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - EFI-MAIN NO. 3 RELAY) 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR