Lexus IS250 IS220d GSE20 ALE20 - STEERING COLUMN

DESCRIPTION

INSPECTION PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (MULTIPLEX COMMUNICATION SYSTEM)

READ VALUE OF INTELLIGENT TESTER (MAIN BODY ECU RH (COWL SIDE J/B RH) COMMUNICATION SIGNAL)

READ VALUE OF INTELLIGENT TESTER (DRIVER SEAT ECU COMMUNICATION SIGNAL)

READ VALUE OF INTELLIGENT TESTER (COMBINATION SWITCH ECU COMMUNICATION SIGNAL)

READ VALUE OF INTELLIGENT TESTER (POWER SOURCE CONTROL ECU COMMUNICATION SIGNAL)

DTC B2621 Communication Interruption

DESCRIPTION

The multiplex tilt & telescopic ECU forms a network with the ECUs of other systems through the communication bus. Each ECU informs the other ECUs that it is connected to the network by outputting a specified signal (periodical signal) onto the communication bus on a regular schedule. The multiplex tilt & telescopic ECU detects the connection of each ECU based on the signal.

DTC No.Detection ItemTrouble Area
B2621Periodical signal from the specified ECU has stopped.
Multiplex communication system
Main body ECU RH (Cowl side J/B RH)
Front power seat switch (Position control ECU) (Driver Side)
Windshield wiper switch assembly (Combination switch ECU)
Power source control ECU
Multiplex tilt & telescopic ECU

INSPECTION PROCEDURE

1.CHECK ANY OTHER DTCS OUTPUT (MULTIPLEX COMMUNICATION SYSTEM)

Check if multiplex communication system DTC B1200, B1210, B1272 or B1278 is output.

  • Result:
  • DTC ConditionProceed to
    No outputA
    B1200 is outputB
    B1210 is outputC
    B1272 is outputD
    B1278 is outputE
  • HINT:
If any other codes besides B2621 are output, perform troubleshooting for those DTCs first.
DTC B1200 indicates a body ECU communication stop malfunction in the multiplex communication system.
DTC B1210 indicates a power source control ECU communication stop malfunction in the multiplex communication system.
DTC B1272 indicates a power seat ECU communication stop malfunction in the multiplex communication system.
DTC B1278 indicates a combination switch ECU communication stop malfunction in the multiplex communication system.
B
Go to step 2
C
Go to step 3
D
Go to step 4
E
Go to step 5
A
END
2.READ VALUE OF INTELLIGENT TESTER (MAIN BODY ECU RH (COWL SIDE J/B RH) COMMUNICATION SIGNAL)

Connect the intelligent tester to the DLC3.

Turn the engine switch on (IG) and turn the intelligent tester on.

Select "Receive from Body" from DATA LIST.

Check the signal communication state of the main body ECU RH (cowl side J/B RH) on the tester screen.

TILT & TELESCO:
ItemMeasurement Item / Range (Display)Normal Condition
Receive from BodyCommunication state of body ECU signal / OK or InterruptionOK: Communication is normal
Interruption: Communication is interrupted
  • OK:
  • "OK" is displayed.
NG
REPLACE MAIN BODY ECU RH (COWL SIDE J/B RH)
OK
REPLACE MULTIPLEX TILT & TELESCOPIC ECU
3.READ VALUE OF INTELLIGENT TESTER (DRIVER SEAT ECU COMMUNICATION SIGNAL)

Select "Receive from Seat ECU" from DATA LIST.

Check the signal communication state of the front power seat switch (position control ECU (Driver Side)) on the tester screen.

TILT & TELESCO:
ItemMeasurement Item / Range (Display)Normal Condition
Receive from Seat ECUCommunication state of seat ECU signal / OK or InterruptionOK: Communication is normal
Interruption: Communication is interrupted
  • OK:
  • "OK" is displayed.
NG
REPLACE FRONT POWER SEAT SWITCH (POSITION CONTROL ECU (DRIVER SIDE))
OK
REPLACE MULTIPLEX TILT & TELESCOPIC ECU
4.READ VALUE OF INTELLIGENT TESTER (COMBINATION SWITCH ECU COMMUNICATION SIGNAL)

Select "Receive from Combi" from DATA LIST.

Check the signal communication state of the combination switch ECU on the tester screen.

TILT & TELESCO:
ItemMeasurement Item / Range (Display)Normal Condition
Receive from CombiCommunication state of combination switch ECU signal / OK or InterruptionOK: Communication is normal
Interruption: Communication is interrupted
  • OK:
  • "OK" is displayed.
NG
REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY (COMBINATION SWITCH ECU)
OK
REPLACE MULTIPLEX TILT & TELESCOPIC ECU
5.READ VALUE OF INTELLIGENT TESTER (POWER SOURCE CONTROL ECU COMMUNICATION SIGNAL)

Select "Power ECU Info" from DATA LIST.

Check the signal communication state of the power source control ECU on the tester screen.

TILT & TELESCO:
ItemMeasurement Item / Range (Display)Normal Condition
Power ECU InfoCommunication state of power source control ECU signal / OK or InterruptionOK: Communication is normal
Interruption: Communication is interrupted
  • OK:
  • "OK" is displayed.
NG
REPLACE POWER SOURCE CONTROL ECU
OK
REPLACE MULTIPLEX TILT & TELESCOPIC ECU
LEXUS IS250, IS220d / GSE20 ALE20
STEERING COLUMN
Lexus IS250 IS220d GSE20 ALE20
POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM