Toyota Sienna Quiz
Can communication

CAN Bus Line

In this manual: Can communication
Introduction — 55Service specifications — 7Maintenance — 7Engine — 264U151e automatic transaxle — 108Transfer — 19Propeller shaft — 8Drive shaft — 14Differential — 16Axle — 18Suspension — 37Tire and wheel — 54Brake control — 141Parking brake — 16Steering Column — 11Power steering — 18Air conditioning — 106Supplemental restraint system — 146Seat belt — 22Theft deterrent — 14Engine immobiliser — 17Cruise control — 65Lighting — 61Wiper and washer — 13Door lock — 42Meter — 28Audio / visual — 94Navigation — 108Park assist / monitoring — 33Horn — 5Garage door opener — 42GR-FE Engine control system — 126Supplemental restraint system — 147Other system — 14Windshield / windowglass — 43Mirror — 23Instrument panel — 6Seat belt — 22Seat — 92Engine hood / door — 104Exterior — 39Interior — 5Sliding roof — 9Multiplex communication — 18Can communication — 23
2steps
~12min
1/5difficulty
Done 0 of 2

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

WIRING DIAGRAM
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)

CHECK CAN BUS WIRE
  1. Turn the ignition switch off.
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

2 CHECK FOR SHORT TO B+ IN CAN BUS WIRE

CHECK FOR SHORT TO B+ IN CAN BUS WIRE
  1. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

3 CHECK FOR SHORT TO GND IN CAN BUS WIRE

CHECK FOR SHORT TO GND IN CAN BUS WIRE
  1. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

GO TO HOW TO PROCEED WITH TROUBLESHOOTING

Test yourself

A quick Toyota Sienna quiz: every answer comes with an explanation and a link to the manual page.