DTC B1210: Power ECU Stop: Procedure

1. Remove the AM2 fuse from the main body ECU RH (cowl side junction block RH).
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   AM2 fuse	Always	Below 1 Ω

NG → REPLACE FUSE (AM2) 

OK: Go to next step 

1. Disconnect the J55 connector.
   Fig 1: Identifying J55 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage and resistance according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   J55-33 (AM1) - Body ground	Always	11 to 14 V
   J55-12 (AM2) - Body ground	Always	11 to 14 V

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J55-6 (GND2) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND) 

OK: Go to next step 

1. Disconnect the J55, J26 and 2F connectors.
   Fig 2: Identifying J55, J26 And 2F Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J55-7 (MPX1) - J26-7 (MPX2)	Always	Below 1 Ω
   J55-24 (MPX2) - 2F-5 (MPX1)	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE POWER SOURCE CONTROL ECU