Toyota Sienna Service Manual: CAN Bus Line
DESCRIPTION
When any DTC for the CAN communication system is output, first measure the resistance between the terminals of the DLC3 to specify the trouble area, and check that there is no short in the CAN main wire, between the main wire, and +B or GND.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
- Turn the ignition switch off before measuring the resistances of CAN bus main wires and CAN bus branch wires.
- After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
- 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 any doors need to be opened in order to check connectors, open the doors and leave them open.
HINT: Operating the ignition switch, any switches, or any doors triggers related ECU and sensor communication with the CAN. This communication will cause the resistance value to change.
1 CHECK CAN BUS WIRE (MAIN WIRE FOR DISCONNECTION, CAN BUS LINES FOR SHORT CIRCUIT)
- Turn the ignition switch off.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
2 CHECK FOR SHORT TO B+ IN CAN BUS WIRE
- Measure the resistance according to the value(s) in the table below.
Standard resistance
3 CHECK FOR SHORT TO GND IN CAN BUS WIRE
- Measure the resistance according to the value(s) in the table below.
Standard resistance
GO TO HOW TO PROCEED WITH TROUBLESHOOTING
ECM Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
ECM Communication Stop
Mode
"Engine" is not displayed on the "Communication
Bus Che ...
Open in CAN Main Bus Line
DESCRIPTION
There may be an open circuit in the CAN main bus wire and/or the DLC3 branch
wire when the resistance
between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 Ω or higher.
...
Other materials:
Selecting the audio
source
Switching between audio sources such as radio and CD are
explained in this section.
Changing audio source
Press the “AUDIO” button to display the audio source selection
screen.
If the audio source selection screen is not displayed, press the “AUDIO”
button again.
Select the des ...
Rear Speed Sensor RH Circuit
DESCRIPTION
Refer to DTCs C0200/31, C0205/32, C1235/35, and C1236/36 (See page BC-17).
DTCs C1273/73 to C1278/78 can be deleted when the speed sensor sends a vehicle
speed signal or the
Test Mode ends. DTCs C1273/73 to C1278/78 are output only in the Test Mode.
HINT:
DTC C0210/33 ...
Oxygen (A/F) Sensor Signal Stuck
HINT:
Although the DTC titles say oxygen sensor, these DTCs relate to the
Air-Fuel Ratio (A/F) sensor.
Sensor 1 refers to the sensor mounted in front of the Three-Way
Catalytic Converter (TWC) and
located near the engine assembly.
DESCRIPTION
The A/F sensor generates a voltage* ...
