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:
Disassembly
1. REMOVE CYLINDER BOOT
(a) Using a screwdriver, remove the set ring and
cylinder boot.
2. REMOVE REAR DISC BRAKE PISTON
(a) Place a shop rug, between the rear disc brake
piston and the disc brake cylinder.
(b) Use compressed air to remove the rear disc brake
piston from the disc brak ...
Disassembly
1. REMOVE NO. 1ULTRASONIC SENSOR RETAINER
(w/ Clearance Sonar System) (See page PM-19)
2. REMOVE NO. 1 ULTRASONIC SENSOR (w/
Clearance Sonar System) (See page PM-19)
3. REMOVE REAR BUMPER ENERGY ABSORBER
4. REMOVE REAR BUMPER BAR PLATE
Remove the 4 clips and the rear bumper bar plate.
5. ...
Dtc check / clear
1. DTC CHECK/CLEAR (WHEN USING SST CHECK WIRE):
(a) DTC check
(1) Using SST, connect terminals TC and CG of the
DLC3.
SST 09843-18040
(2) Turn the ignition switch to the ON position.
(3) Read the DTCs from the ABS warning light on
the combination meter.
HINT:
If no code appears, inspe ...
