Active Control Engine Mount System [03/2014 - ]: 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.

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

NG → REPAIR OR REPLACE VACUUM HOSES 

OK: Go to next step 

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.

NG → CHECK AND REPLACE VACUUM SOURCE AND HOSES 

OK: Go to next step 

1. Inspect the vacuum switching valve for active control engine mount operation. Refer to INSPECTION [03/2014 - ] - Step 1 .

NG → See step   8 

OK: Go to next step 

1. Inspect the vacuum switching valve for active control engine mount. Refer to INSPECTION [03/2014 - ] - Step 2 .

NG → See step   8 

OK: Go to next step 

1. Inspect the front engine mounting insulator. Refer to ON-VEHICLE INSPECTION [03/2014 - ] - Step 1 .

NG → See step   9 

OK: Go to next step 

1. Disconnect the 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	Switch Condition	Specified Condition
   D4-1 - Body ground	Engine switch on (IG)	11 to 14 V

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 2 FUSE - VACUUM SWITCHING VALVE) 

OK: Go to next step 

1. Disconnect the 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 (Check for Open)

   Tester Connection	Condition	Specified Condition
   D4-2 - D1-83 (ACM)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   D4-2 or D1-83 (ACM) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (VACUUM SWITCHING VALVE - ECM) 

OK → See step   10