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:

Air Inlet Damper Control Servo Motor Circuit
DESCRIPTION The air inlet control servo motor is controlled by the A/C amplifier and moved to the desired position. The air inlet control servo motor switches the air inlet mode by rotating (normal, reverse) with electrical power from the A/C amplifier. This controls intake air and changes ...

Removal
1. REMOVE INSTRUMENT PANEL SUB-ASSEMBLY WITH PASSENGER AIRBAG ASSEMBLY HINT: Refer to the instructions for removal of the instrument panel sub-assembly w/ passenger airbag assembly (See page IP-5). 2. REMOVE HEATER TO FOOT DUCT NO.1 (a) Remove the clip and the heater to foot duct No. 1. 3 ...

Fuel tank
Components REMOVAL 1. DISCHARGE FUEL SYSTEM PRESSURE (See page FU-1) 2. REMOVE CHARCOAL CANISTER PROTECTOR (See page FU-30) 3. REMOVE REAR FLOOR NO. 2 CROSSMEMBER BRACE LH (a) Remove the 2 bolts and the rear floor No. 2 crossmember brace LH. 4. REMOVE FUEL TANK FILLER HOSE COVER ...

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