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DTC    B2620    ECU Power Source Circuit Malfunction

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DESCRIPTION

The ECU power source circuit supplies positive voltage to the multiplex tilt & telescopic ECU.

DTC No.
Detection Item
Trouble Area
B2620
The voltage of the ECU power source drops to 8 V or less and continues for 10 secs. or more.
  1. Battery
  2. Wire harness or connector
  3. Multiplex tilt & telescopic ECU

WIRING DIAGRAM


C106489E02


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - BATTERY)


    C106463E29

  1. Disconnect the L27 connector from the multiplex tilt & telescopic ECU.

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

    Voltage:
    Tester connection
    (Terminal No.)
    		Condition
    		Specified value
    ECUB (L27-9) - Body ground
    		Always
    		10 to 14 V



NG
Go to step 3
OK


2.CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - BODY GROUND)


    C106463E30

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

    Resistance:
    Tester connection
    (Terminal No.)
    		Condition
    		Specified value
    GND (L27-11) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MULTIPLEX TILT & TELESCOPIC ECU 

3.CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - COWL SIDE J/B RH)


    C106480E03

  1. Disconnect the DA connector from the cowl side J/B RH.

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

    Resistance:
    Tester condition
    (Terminals No.)
    		Condition
    		Specified value
    ECUB (L27-9) - DA-18
    		Always
    		Below 1 Ω
    ECUB (L27-9) - 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)