Toyota RAV4 manuals

Toyota Sienna Service Manual: Diagnosis system

1. CHECK DLC3

CHECK DLC3

  1.  The ECU uses ISO 15765-4 for communication.

    The terminal arrangement of the DLC3 complies with SAE J1962 and meets the ISO 15765-4 format.

CHECK DLC3

NOTICE: *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches, or the doors. If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.

HINT: If the display shows a communication error message when connecting the cable of the intelligent tester to the DLC3, turning the ignition switch to the ON position and operating the intelligent tester, there is a problem on the vehicle side or tool side.

2. SYMPTOM SIMULATION

HINT:

The most difficult case in troubleshooting is when no symptoms occur. In such cases, a thorough customer problem analysis must be carried out. Then the same or similar conditions and environment in which the problem occurred in the customer's vehicle should be simulated.

No matter how experienced or skilled a technician may be, if he proceeds to troubleshoot without confirming the problem symptoms, he will likely overlook something important and make a wrong guess at some points in the repair operation.

This leads to a standstill in troubleshooting.

  1.  Vibration method: When vibration seems to be the major cause.

SYMPTOM SIMULATION

HINT: Perform the simulation method only during the primary check period (for approximately 6 seconds after the ignition switch is turned to the ON position).

  1. Slightly vibrate the part of the sensor considered to be the problem cause with your fingers and check whether the malfunction occurs.

    HINT: Shaking the relays too strongly may result in open relays.

  2.  Slightly shake the connector vertically and horizontally.
  3.  Slightly shake the wire harness vertically and horizontally.

The connector joint and fulcrum of the vibration are the major areas to be checked thoroughly.

  1.  Simulation method for DTC B1795: Turn the ignition switch from the LOCK to the ON position, hold for 10 seconds, and then back to the LOCK position again 50 times in a row.

    HINT: DTC B1795 is output if the occupant classification ECU receives the ignition switch LOCK-ON-LOCK signal 50 times in a row when a malfunction occurs in the power circuit for the occupant classification system.

3. FUNCTION OF PASSENGER AIRBAG ON/OFF INDICATOR

  1. Initial check
  1. Turn the ignition switch to the ON position.
  2. The passenger airbag ON/OFF indicator ("ON" and "OFF") comes on for approximately 4 seconds, then goes off for approximately 2 seconds.
  3.  Approximately 6 seconds after the ignition switch is turned to the ON position, the passenger airbag ON/OFF indicator will be ON/ OFF depending on the conditions listed below.

FUNCTION OF PASSENGER AIRBAG ON/OFF INDICATOR

HINT:

FUNCTION OF PASSENGER AIRBAG ON/OFF INDICATOR

4. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

 CHECK PASSENGER AIRBAG ON/OFF INDICATOR

  1.  Turn the ignition switch to the ON position.
  2.  Check that the passenger airbag ON/OFF indicator ("ON" and "OFF") comes on for approximately 4 seconds, then goes off for approximately 2 seconds.

HINT: Refer to the table in the previous step regarding the passenger airbag ON/OFF indicator when the ignition switch is turned to the ON position and approximately 6 seconds have elapsed.

Terminals of ECU
1. OCCUPANT CLASSIFICATION ECU ...

DTC check / clear
1. DTC CHECK HINT: When DTC B1150/23 is detected as a result of troubleshooting for "Airbag System", perform troubleshooting for the Occupant Classification System.  Check t ...

Other materials:

Removal
1. REMOVE INSTRUMENT CLUSTER FINISH PANEL CENTER NO.1 (See page IP-8) 2. REMOVE INSTRUMENT CLUSTER FINISH PANEL CENTER NO.2 3. REMOVE SHIFT LEVER KNOB SUB-ASSEMBLY HINT: (See page AX-146 for U151E, AX-146 for U151F) 4. REMOVE INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY CENTER (See page IP-9) 5 ...

Unlocking and locking the doors from the inside
Door lock switch Locks all the doors Unlocks all the doors Inside lock button Locks the door Unlocks the door The front doors can be opened by pulling the inside handle even if the lock buttons are in the lock position. ...

Disassembly
1. REMOVE COOLER THERMISTOR NO.1 (for Automatic Air Conditioning System) (a) Disengage the 2 claw fittings and the clamp and remove the cooler thermistor No. 1. 2. REMOVE COOLING UNIT MOTOR SUB-ASSEMBLY WITH FAN (a) Remove the 3 screws and the cooling unit motor sub-assembly w/ fan. 3. ...

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