Toyota RAV4 manuals

Toyota Sienna Service Manual: System description

1. MULTIPLEX COMMUNICATION SYSTEM (BEAN)

  1. The BEAN communication line is used to control the combination meter, the A/C amplifier, the airbag sensor assembly, the multiplex network body ECU, the power slide door ECU LH, the power slide door ECU RH, the power back door ECU, the seat position control ECU, the outer mirror control ECU LH, and the outer mirror ECU RH. If there is a shortcircuit (bus-down) in the line, the communication to the system that has a short-circuit (bus-down) will be disabled and the DTC concerning the system will be output from the multiplex network gateway ECU.

MULTIPLEX COMMUNICATION SYSTEM

MULTIPLEX COMMUNICATION SYSTEM

  1. If the DTC of ECU communication stop is output, connectors may be disconnected, or communication buses may be open at 2 points. It will not become abnormal with only 1 communication bus open.

MULTIPLEX COMMUNICATION SYSTEM

  1. If 2 communication buses are open at the points shown in the illustration, the DTC of ECU communication stop between those 2 buses is output.

2. CHECK COMMUNICATION FUNCTION

  1. Check the battery voltage.

    Standard voltage: 11 to 14 V

  2. Inspect the DTC output.
  1. Check a DTC concerning the multiplex network body ECU by connecting the intelligent tester to the DLC3 and turning the ignition switch to the ON position.
  2. When the display shows DTCs concerning the ECU unconnected and the communication bus defective, perform the inspection depending on the troubleshooting procedures.

HINT: When another DTC is output, refer to the DTC table and check the applicable section.

Multiplex communication system
PARTS LOCATION ...

How to proceed with troubleshooting
HINT: Troubleshoot in accordance with the procedures on the following pages. 1 VEHICLE BROUGHT TO WORKSHOP 2 DTC CHECK Check for DTCs and make a note of the code that is output (See page MP- ...

Other materials:

AUX Port/USB Port
Connect an iPod, USB memory device or portable audio player to the AUX port/USB port as indicated below. Select “iPod”, “USB” or “AUX” on the audio source selection screen and the device can be operated via audio system. Connecting using the AUX port/USB port iPod Open the cove ...

How to proceed with troubleshooting
HINT: Troubleshoot in accordance with the procedures on the following pages 1 VEHICLE BROUGHT TO WORKSHOP 2 CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK 3 INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN) Use the intelligent tester to check for normal ...

Removal
1. REMOVE V-BANK COVER SUB-ASSEMBLY (See page EM-28) 2. REMOVE NO. 1 ENGINE UNDER COVER (See page EM-26) 3. DRAIN ENGINE COOLANT (See page CO-6) 4. REMOVE NO. 2 AIR CLEANER INLET (See page EM- 28) 5. REMOVE BATTERY (See page EM-26) 6. REMOVE FRONT BUMPER ASSEMBLY (See page ET-3) 7. REMOVE ...

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