Active Control Engine Mount System [07/2015 - ]: Procedure

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK

   No looseness, disconnection or blockage.

   TEXT IN ILLUSTRATION
   
   

   *1	Engine
   *2	Duty Vacuum Switching Valve (for Active Control Engine Mount)
   *3	Front Engine Mounting Insulator Assembly
   *4	ECM
   *5	Air Cleaner
   *6	Vacuum Tank
   *a	to Vacuum Switching Valve (for Air Intake Control Valve)

Result:  NG

NG 

REPAIR OR REPLACE VACUUM HOSES 

Result:  OK

OK 

See step  2

1. Disconnect the vacuum hose from the air cleaner cap.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Start the engine.
3. Check that the disconnected port located on the vacuum tank applies suction to your finger.

   OK

   Vacuum exists.

Result:  NG

NG 

CHECK AND REPLACE VACUUM SOURCE AND HOSES 

Result:  OK

OK 

See step  3

1. Inspect the duty vacuum switching valve (for active control engine mount) operation (Refer to PROCEDURE - Step 1 ).

Result:  NG

NG 

REPLACE DUTY VACUUM SWITCHING VALVE (FOR ACTIVE CONTROL ENGINE MOUNT) 

(Refer to REMOVAL [07/2015 - ] )

Result:  OK

OK 

See step  4

1. Inspect the duty vacuum switching valve (for active control engine mount) resistance (Refer to PROCEDURE - Step 2 ).

Result:  NG

NG 

REPLACE DUTY VACUUM SWITCHING VALVE (FOR ACTIVE CONTROL ENGINE MOUNT) 

(Refer to REMOVAL [07/2015 - ] )

Result:  OK

OK 

See step  5

1. Inspect the front engine mounting insulator assembly (Refer to ON-VEHICLE INSPECTION [07/2015 - ] ).

Result:  NG

NG 

REPLACE FRONT ENGINE MOUNTING INSULATOR ASSEMBLY 

(Refer to REMOVAL [07/2015 - ] )

Result:  OK

OK 

See step  6

1. Disconnect the duty vacuum switching valve (for active control engine mount) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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
   D9-1 - Body ground	Engine switch on (IG)	11 to 14 V

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   *a	Front view of wire harness connector (to Duty Vacuum Switching Valve (for Active Control Engine Mount))

Result:  NG

NG 

See step  8

Result:  OK

OK 

See step  7

1. Disconnect the duty vacuum switching valve (for active control engine mount) 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
   D9-2 - A22-8 (ACM)	Always	Below 1 Ω
   D9-2 or A22-8 (ACM) - Body ground	Always	10 kΩ or higher

Result:  OK

OK 

REPLACE ECM 

(Refer to REMOVAL [07/2015 - ] )

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D9-1 - 1A-8	Always	Below 1 Ω
   D9-1 or 1A-8 - Body ground	Always	10 kΩ or higher

Result:  OK

OK 

GO TO ECM POWER SOURCE CIRCUIT 

(Refer to ECM Power Source Circuit [07/2015 - ] )

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR