Toyota Sienna Service Manual: Diagnosis system
1. BUS CHECK
- Select "BUS CHECK" from the "OBD/MOBD MENU" screen.
HINT: The ECUs and sensors that are properly connected to the CAN communication system can be displayed using the intelligent tester via the CAN VIM.
- Press "ENTER" on the intelligent tester.
- The screen displays the ECUs and sensors that are properly connected to the CAN communication system.
HINT: Properly connected ECUs or sensors that are not displayed on the screen indicate that a communication stop is occuring in the system, sensor, or ECU which is not displayed.
2. CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION
- Systems (ECUs, sensors) that use CAN communication vary depending on the vehicle's optional equipment. Check which systems (ECUs, sensors) are installed on the vehicle.
HINT:
- *1: with VSC
- *2: with Dynamic laser cruise control
3. DTC TABLE BY ECU
HINT:
- For the CAN communication system, CAN communication system DTCs stored in certain ECUs can be displayed using the intelligent tester.
- If CAN communication system DTCs are output,
trouble cannot be determined only by the DTCs.
Perform troubleshooting according to "CHECK CAN BUS LINE" (See page CA-35).
- Skid control ECU (with VSC)
HINT: DTC communication uses the CAN communication system.
- ECM (with Dynamic laser cruise control)
HINT:
- DTC communication uses the CAN communication system.
- Distance control ECU data is output.
- Displayed on the "communication malfunction DTCs" screen of the intelligent tester. If U0235 or U1102 is output alone, the CAN communication is normal
- Gateway ECU
HINT: The network gateway ECU is connected to the CAN communication system, but CAN communication DTCs are not output.
4. DTCS COMBINATION TABLE
HINT: *1: with Dynamic laser cruise control
Terminals of ECU
1. JUNCTION CONNECTOR
Junction connector
with VSC
HINT:
*1: with Dynamic laser cruise control
without VSC
CAN junction connector (with VSC)
with VSC
The connection ...
Fail-safe chart
1. FAIL-SAFE FUNCTION
When communication fails in any of the main wires
(communication lines) due to a short circuit or other
causes, the fail-safe function, which is specified for
each syst ...
Other materials:
Installation
1. INSTALL SPIRAL CABLE
Check that the front wheels are facing straight
ahead.
Set the turn signal switch to the neutral position.
NOTICE:
If it is not in the neutral position, the pin of the
turn signal switch may snap.
Install the spiral cable.
NOTICE:
...
Oxygen Sensor Heater Control Circuit
HINT:
Sensor 2 refers to the sensor mounted behind the Three-Way Catalytic
Converter (TWC) and located
furthest from the engine assembly.
DESCRIPTION
Refer to DTC P0136 (See page ES-160).
HINT:
When any of these DTCs are set, the ECM enters fail-safe mode. The ECM turns
off the Heated ...
Dtc check / clear
1. DTC CHECK (USING SST CHECK WIRE)
(a) Check DTCs.
(1) Turn the ignition switch off.
(2) Using SST, connect terminals TC and CG of
DLC3.
SST 09843-18040
(3) Turn the ignition switch to the ON position.
(4) Read and record any DTCs from the tire
pressure warning light on the combin ...
