Toyota Sienna Service Manual: Diagnosis system
1. 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.
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.
- 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 DRIVER SIDE J/B ASSEMBLY (MULTIPLEX NETWORK BODY ECU)
Disconnect the B6, 1C, 1K and 1L J/B connectors.
Measure the voltage and resistance according to
the value(s) in th ...
Data list / active test
1. READ DATA LIST
HINT:
Using the intelligent tester's DATA LIST allows switch,
actuator and other item values to be read without
removing any parts. Reading the DATA LIST early in
troubleshootin ...
Other materials:
Diagnostic trouble code chart
1. DTC CHECK
If a malfunction code is displayed during the DTC check ,
check the suspected area listed for that code in the table
below, and proceed to the appropriate page.
DIAGNOSTIC TROUBLE CODE CHART
DTC No.
Detection Item
Suspect Area
B1244
Light Se ...
Removal
1. REMOVE FRONT SEAT INNER BELT ASSEMBLY
HINT:
Refer to the instructions for disassembly of the front seat assembly
(for flat type).
Refer to the instructions for disassembly of the front seat assembly
(for manual seat).
Refer to the instructions for disassembly of the fro ...
Vehicle lift and support locations
1. NOTICE ABOUT VEHICLE CONDITION WHEN
JACKING UP VEHICLE
(a) The vehicle must be unloaded before jacking up/
lifting up the vehicle. Never jack up/lift up a heavily
loaded vehicle.
(b) When removing heavy parts such as the engine and
transmission, the center of gravity of the vehicle
may s ...