Toyota RAV4 Quiz
Can communication

Can bus line

In this manual: Can communication
Introduction — 37Interior — 12Exterior — 432Az-fe engine mechanical — 1552Az-fe ignition — 182Az-fe charging — 232Az-fe emission control — 82az-fe exhaust — 32Az-fe fuel — 72Az-fe lubrication — 4Brake — 17Brake control — 63U140f automatic transaxle — 59Instrument panel — 8Suspension — 18Drive shaft — 23Axle — 6Tire and wheel — 30Air conditioning — 93Lighting — 45Cruise control — 21Differential — 12Door lock — 31Engine immobiliser — 21Horn — 5Can communication — 27Mirror — 5Parking brake — 5Power steering — 27Propeller shaft — 3Seat — 29Seat belt — 27Sliding roof — 25Steering column — 6Wiper and washer — 11Supplemental restraint system — 95Other system — 5Maintenance — 14
~1min read
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 not a short in the can main wire, between the main wire, to +b, or to gnd.

Wiring diagram
Toyota RAV4. Can bus line

Toyota RAV4. Can bus line

Inspection procedure Notice:
  • Turn the ignition switch off before measuring the resistances of the main wire and the branch wire.
  • 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 for at least 1 minute and do not operate the ignition switch, any switches or doors. If 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, which causes resistance variation.

  1. Check can bus wire (main wire for open, can bus lines for short circuit)
Toyota RAV4. Check can bus wire (main wire for open, can bus lines for short circuit)

  1. Measure the resistance of the dlc3.
Standard resistance


  1. Check can bus line for short to +b
Toyota RAV4. Check can bus line for short to +b

  1. Measure the resistance of the dlc3.
Standard resistance


  1. Check can bus line for short to gnd
Toyota RAV4. Check can bus line for short to gnd

  1. Measure the resistance of the dlc3.
Standard resistance


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