Dtc B1213 Tilt And Telescopic Ecu Communication Stop

Communication System. Lexus Is250, Is220D. Gse20 Ale20
Multiplex Communication. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE (TI & TE, MPX-B)

CHECK WIRE HARNESS (TILT AND TELESCOPIC ECU - BATTERY AND BODY GROUND)

CHECK RESISTANCE OF COMMUNICATION LINE

DTC B1213 Tilt and Telescopic ECU Communication Stop


DESCRIPTION

  1. This DTC is detected when communication between the tilt and telescopic ECU and the gateway ECU stops for more than 10 seconds.

DTC No.
DTC Detection Condition
Trouble Area
B1213
Tilt and telescopic ECU communication stops
  1. Tilt and telescopic ECU
  2. Wire harness

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Multiplex Communication.Multiplex Communication System. Dtc B1213 Tilt And Telescopic Ecu Communication Stop


INSPECTION PROCEDURE

HINT:
When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1213, repair the "+B or GND short malfunction of communication bus" DTCs first.
1.INSPECT FUSE (TI & TE, MPX-B)

  1. Remove the TI & TE fuse from the main body ECU RH (cowl side J/B RH).

  1. Remove the MPX-B fuse from the engine room J/B No. 1.

  1. Measure the resistance of the fuses.

    Standard resistance:
    Below 1 Ω


NG
REPLACE FUSE
OK


2.CHECK WIRE HARNESS (TILT AND TELESCOPIC ECU - BATTERY AND BODY GROUND)


    Lexus Is250, Is220D. Gse20 Ale20.Multiplex Communication.Multiplex Communication System. Dtc B1213 Tilt And Telescopic Ecu Communication Stop

  1. Disconnect the J28 ECU connector.

  1. Measure the resistance and voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    +B (J28-2) - Body ground
    		Always
    		10 to 14 V
    ECUB (J28-9) - Body ground
    		Always
    		10 to 14 V
    Standard resistance:
    Tester Connection
    		Specified Condition
    GND (J28-11) - Body ground
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK RESISTANCE OF COMMUNICATION LINE


  1. Disconnect the J28 and RA ECU connectors.


    Lexus Is250, Is220D. Gse20 Ale20.Multiplex Communication.Multiplex Communication System. Dtc B1213 Tilt And Telescopic Ecu Communication Stop

  1. Measure the resistance between the specified terminals on the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    MPX1 (J28-5) - RA-20
    		Below 1 Ω
    MPX1 (J28-5) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TILT AND TELESCOPIC ECU