Toyota RAV4 Service Manual: Diagnosis system

1. Bus check

1. 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 can vim.

2. Press "enter" on the intelligent tester via can vim.

3. The screen displayed the ecus and sensors that are properly connected to the can communication system.

Hint:

There is a communication stop in the system of any properly connected ecus or sensors that are not displayed (see page ca-10).

2. Check installed systems (ecus and sensors) that use can communication

1. System (ecus and sensors) that use can communication vary depending on the vehicle's optional settings. Check which systems (ecus and sensors) are installed on the vehicle.

3. Dtc table by ecu

Hint:

• In the can communication system, can communication system dtcs output by the ecu can be displayed by using the intelligent tester.
• If can communication system dtcs are output, the trouble cannot be determined solely from the dtcs.

  Perform troubleshooting according to "how to proceed with troubleshooting" (see page ca-8).

1. Abs and traction actuator (skid control ecu)

Hint:

Dtc communication uses the can communication system.

2. Power steering ecu

Hint:

Dtc communication uses the can communication system.

3. Ecm

Hint:

Dtc communication uses the can communication system.

4. Air conditioning amplifier for vehicle with air conditioning (automatic air conditioning system and manual air conditioning system).

Hint:

Dtc communication uses the can communication system.

5. Combination meter ecu

Hint:

Dtc communication uses the can communication system.

6. 4Wd control ecu

For vehicle with 4wd only.

Hint:

Dtc communication uses the can communication system.

7. Main body ecu

Hint:

The center airbag sensor is connected to the can communication system but can communication dtcs are not output.

8. Center airbag sensor

Hint:

The center airbag sensor is connected to the can communication system but can communication dtcs are not output.

4. Dtc combination table

Hint:

• O: Outputs under condition shown in table above
• X: not output

Hint:

• O: Outputs under condition shown in table above
• X: not output
• Check the stop mode by using the results of the bus check for the center airbag sensor (see page ca- 69) and main body ecu (see page ca-64).

1. Perform troubleshooting according to the combination of dtcs output.

• Abs and traction actuator (skid control ecu) communication stop mode: (see page ca-42)
• Power steering ecu communication stop mode: (see page ca-49)
• Steering angle sensor communication stop mode: (see page ca-52)
• Yaw rate sensor communication stop mode: (see page ca-55)
• Ecm communication stop mode: (see page ca-58)
• Air conditioning amplifier communication stop mode: (see page ca-45)
• Combination meter ecu communication system: (see page ca-67)
• 4Wd control ecu communication stop mode: (see page ca-72)