Toyota RAV4 manuals

Toyota Sienna Service Manual: Diagnosis system

1. DESCRIPTION

When troubleshooting a vehicle with the diagnosis system, the only difference from the usual troubleshooting procedure is connecting the intelligent tester to the vehicle and reading various data output from the vehicle's clearance warning ECU.

The clearance warning ECU records DTCs when the computer detects a malfunction in the computer itself or in its circuits.

To check the DTCs, connect the intelligent tester to the DLC3 on the vehicle. The intelligent tester enables you to erase the DTCs, activate the various actuators, and check the freeze frame data and Data List.

2. CHECK DLC3

CHECK DLC3

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

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

    If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness or connector.

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.

HINT: If the display shows a communication error message after connecting the intelligent tester to the DLC3 and turning the ignition switch to the ON position, there is a problem with either the vehicle or the tool (intelligent tester only).

Terminals of ECU
1. INSTRUMENT PANEL JUNCTION BLOCK (MULTIPLEX NETWORK BODY ECU)  Disconnect the B6, B7 and B9 ECU connectors. Disconnect the 1A, 1C, 1K, 1L and 1P J/B connectors. Check the vol ...

DTC check / clear
1. DTC CHECK/CLEAR (USING INTELLIGENT TESTER:)  DTC check  Connect the intelligent tester to the DLC3. Turn the ignition switch to the ON position.  Read the DTCs on t ...

Other materials:

Inspection
1. Inspect generator clutch pulley (a) Hold the center of the pulley, and confirm that the outer ring turns counterclockwise and does not turn clockwise. If the result is not as specified, replace the clutch pulley. 2. Remove generator drive end frame bearing (a) Check that the bear ...

Removal
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait for 90 seconds after disconnecting the cable to prevent the airbag working. 2. REMOVE FRONT SEAT ASSEMBLY HINT:  Refer to the instructions for removal of the front seat assembly (for flat type).  Refer to the in ...

Display contents
The multi-information display presents the driver with a variety of vehicle data. Menu icons Displays the following information when an icon is selected. Some of the information may be displayed automatically depending on the situation. Drive information Select to display various ...

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