MULTIPLEX COMMUNICATION SYSTEM, Diagnostic DTC:B1208

DTC Code DTC Name
B1208 Passenger Side Outer Mirror ECU

DESCRIPTION


DTC No. DTC Detection Condition Trouble Area
B1208 Outer mirror control ECU (passenger side) communication stops

  • Outer mirror control ECU (passenger side)

  • Wire harness or connector

WIRING DIAGRAM

A0161O7E02

INSPECTION PROCEDURE

Tech Tips

If "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1208, repair the "+B or GND short malfunction of communication bus" DTCs first Click here.

PROCEDURE


  1. INSPECT FUSE (FR DOOR RH*1, FR DOOR LH*2, MPX-B)


    1. Remove the FR DOOR RH fuse from the main body ECU RH (cowl side junction block RH)*1.

    2. Remove the FR DOOR LH fuse from the main body ECU LH (cowl side junction block LH)*2.

    3. Remove the MPX-B fuse from the engine room relay block No. 1.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      FR DOOR RH fuse*1 Always Below 1 Ω
      FR DOOR LH fuse*2 Always Below 1 Ω
      MPX-B fuse Always Below 1 Ω

      • *1: for LHD

      • *2: for RHD


    NG

    REPLACE FUSE

    OK

  2. CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU - BATTERY AND BODY GROUND)


    1. A0161KYE08

      Disconnect the L10 ECU connector*1.

    2. Disconnect the M10 ECU connector*2.

    3. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition

      L10-6 (BDR)*1 - Body ground

      M10-6 (BDR)*2 - Body ground

      		 Always 11 to 14 V

      L10-4 (CPUB)*1 - Body ground

      M10-4 (CPUB)*2 - Body ground

      		 Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition

      L10-1 (GND)*1 - Body ground

      M10-1 (GND)*2 - Body ground

      		 Always Below 1 Ω

      • *1: for LHD

      • *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (OUTER MIRROR CONTROL ECU - BATTERY AND BODY GROUND)

    OK

  3. CHECK HARNESS AND CONNECTOR (COMMUNICATION LINE)


    1. Disconnect the L10 and P33 ECU connectors*1.

      A0162JDE11

    2. Disconnect the M10 and J55 ECU connector*2.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      L10-8 (MPX1) - P33-27 (MPX1)*1

      M10-8 (MPX1) - J55-24 (MPX2)*2

      		 Always Below 1 Ω

      L10-8 (MPX1)*1 - Body ground

      M10-8 (MPX1)*2 - Body ground

      		 Always 10 kΩ or higher

      • *1: for LHD

      • *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (COMMUNICATION LINE)

    OK

    REPLACE OUTER MIRROR CONTROL ECU (PASSENGER SIDE) Click here