Inspection Procedure

1. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   VOLTAGE SPECIFICATION TABLE
   
   

   Tester Connection	Condition	Specified Value
   +B (A9-2) - Body ground	Always	10 to 14 V
   IG2 (A9-10) - Body ground	Engine switch on (IG)	10 to 14 V

   Fig 1: Identifying ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: CHECK FOR INTERMITTENT PROBLEMS 

NG: Go to Next Step 

1. Disconnect the active control engine mount ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE REFERENCE TABLE
   
   

   Tester Connection	Specified Condition
   GND (A9-12) - Body ground	Below 1 Ω

   Fig 2: Identifying A9 Active Control Engine Mount ECU Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reconnect the active control engine mount ECU connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (ACTIVE CONTROL ENGINE MOUNT ECU - BODY GROUND) 

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (ACTIVE CONTROL ENGINE MOUNT ECU - BATTERY)