Toyota Sienna Service Manual: Diagnosis system

Toyota Sienna Service Manual / Engine hood / door / Power slide door 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 Disconnect the P25 and P26 ECU connectors, and check the voltage and resistance of each terminal of the wire harness side connectors If the result i ...

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:

Diagnosis system
1. CHECK DLC3 The ECU uses the ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format. NOTICE: *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not opera ...

Disassembly
1. Remove rear wheel 2. Drain brake fluid Notice: wash the brake fluid off immediately if it attaches to any painted surface. 3. REMOVE REAR BRAKE DRUM SUB-ASSEMBLY (a) Release the parking brake lever, and remove the rear brake drum. HINT: If the rear brake drum cannot be removed easily, p ...

Removal
1. PRECAUTION CAUTION: Be sure to read "PRECAUTION" thoroughly before servicing. 2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait for 90 seconds after disconnecting the cable to prevent the airbag working. 3. REMOVE STEERING WHEEL NO.3 COVER LOWER Using a ...