DTC B2620: ECU Power Source Circuit Malfunction: Procedure

1. Disconnect the J28 connector from the multiplex tilt & telescopic ECU.

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

   Standard voltage

   Tester connection (Terminal No.)	Condition	Specified value
   ECUB (J28-9) - Body ground	Always	10 to 14 V

NG → See step   3 

OK: Go to next step 

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

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   Standard resistance

   Tester connection (Terminal No.)	Condition	Specified value
   GND (J28-11) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MULTIPLEX TILT & TELESCOPIC ECU 

1. Disconnect the RA connector from the main body ECU RH (cowl side J/B RH).

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

   Standard resistance

   Tester condition (Terminals No.)	Condition	Specified value
   ECUB (J28-9) - RA-18	Always	Below 1 Ω
   ECUB (J28-9) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - COWL SIDE J/B RH) 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - COWL SIDE J/B RH)