Toyota Sienna Service Manual: Diagnosis system

Toyota Sienna Service Manual / Engine hood / door / Slide door closer system / Diagnosis system

1. CHECK DLC3

CHECK DLC3

The vehicle's ECU uses ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches 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.

CHECK DLC3

Connect the cable of the intelligent tester to the DLC3, turn the ignition switch to the ON position and attempt to use the intelligent tester. If the screen displays a communication error message, a problem exists in the vehicle side of the tester side.

HINT:

If communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the original vehicle.
If communication is still impossible when the tool is connected to another vehicle, the problem is probably in the tool itself. Consult the Service Department listed in the tool's instruction manual

Terminals of ECU

1. CHECK POWER SLIDE DOOR ECU LH (WITH POWER SLIDE DOOR) Disconnect the P25 and P26 ECU connectors, and check the voltage and resistance of each terminal of the wire harness side connecto ...

DTC check / clear

1. CHECK DTC (USING INTELLIGENT TESTER) Checking DTCs. Connect the intelligent tester to the DLC3. Turn the ignition switch ON. Read DTCs by following the prompts o ...

Other materials:

Reassembly
1. INSTALL UNDERDRIVE CLUTCH DRUM O-RING (a) Coat a new O-ring with ATF, and install it to the underdrive clutch drum. NOTICE: Make sure that the O-ring is not twisted or pinched. 2. INSTALL UNDERDRIVE CLUTCH PISTON SET (a) Coat the underdrive clutch piston with ATF, and install it t ...

Knock sensor
COMPONENTS REMOVAL 1. DISCHARGE FUEL SYSTEM PRESSURE (See page FU-13) 2. REMOVE V-BANK COVER SUB-ASSEMBLY (See page EM-28) 3. DRAIN ENGINE COOLANT (See page CO-6) 4. REMOVE WINDSHIELD WIPER MOTOR ASSEMBLY HINT: (See page WW-4) 5. REMOVE FRONT OUTER COWL TOP PANEL SUBASSEMBLY ( ...

On-vehicle inspection
1. FRONT SEAT SIDE AIRBAG ASSEMBLY (VEHICLE NOT INVOLVED IN COLLISION) Perform a diagnostic system check. With the front seat side airbag assembly installed on the vehicle, perform a visual check. If there are any defects as mentioned below, replace the front seatback as ...