DTC B2620: ECU Power Source Circuit Malfunction [09/2014 - ]: Procedure

1. Disconnect the O18 multiplex tilt and telescopic ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   O18-9 (ECUB) - Body ground	Always	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Disconnect the O18 multiplex tilt and telescopic ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU)

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   O18-8 (GND2) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU. Refer to  REMOVAL [09/2014 - 01/2023]  , or refer to  REMOVAL [01/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR