Diagnosis System

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM

DIAGNOSIS SYSTEM

1. BUS CHECK
(a) Using Techstream, select "CAN Bus Check" from the "System Select".
2. CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION
(a) 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.






3. DTC TABLE BY ECU
HINT:
- For the CAN communication system, CAN communication system DTCs stored in certain ECUs can be displayed using Techstream.
- If CAN communication system DTCs are output, trouble cannot be determined only by the DTCs. Perform troubleshooting according to "HOW TO PROCEED WITH TROUBLESHOOTING" How to Proceed With Troubleshooting.

(a) ECM (2AZ-FE)





HINT:
- DTC communication is via the CAN communication system.
- *: The ECM is malfunctioning if only U0101 is output. Replace the ECM.

(b) ECM (2GR-FE)





HINT:
- DTC communication is via the CAN communication system.
- *: The ECM is malfunctioning if only U0101 is output. Refer to SFI system U0101.

(c) ECT (2AZ-FE)





HINT:
- DTC communication is via the CAN communication system.
- *: The ECM is malfunctioning if only U0100 is output. Replace the ECM.

(d) ECT (2GR-FE)





HINT:
- DTC communication is via the CAN communication system.
- *: The ECM is malfunctioning if only U0100 is output. Refer to Automatic Transaxle system U0100.

(e) SKID CONTROL ECU (with VSC)





HINT:
- DTC communication is via the CAN communication system.
- *: TMC made only

(f) SKID CONTROL ECU (without VSC)





HINT: DTC communication is via the CAN communication system.

(g) COMBINATION METER ECU





HINT: DTC communication is via the CAN communication system.

(h) AIR CONDITIONER AMPLIFIER





HINT: DTC communication is via the CAN communication system.

(i) MAIN BODY ECU (with smart key system)





HINT:
- DTC communication is via the CAN communication system.
- *: The main body ECU is malfunctioning if B1207 and/or B2326 are output alone. Refer to DTC chart Automatic Transaxle System - U660E.

(j) MAIN BODY ECU (without smart key system)
HINT: Although the center airbag sensor is connected to the CAN communication system, CAN communication DTCs are not output.

(k) CENTER AIRBAG SENSOR
HINT: Although the center airbag sensor is connected to the CAN communication system, CAN communication DTCs are not output.

(l) CERTIFICATION ECU
HINT: Although the Main Body ECU is connected to the CAN communication system, CAN communication DTCs are not output.

4. DTC COMBINATION TABLE
(a) with VSC SYSTEM





*: TMC made only.
HINT:
- o: Set
- X: Not set or may be set according to the malfunctioning part when one side of the CAN bus wire opens
- a��: Set under the condition shown in the table above





*: TMC made only.
HINT:
- o: Set
- X: Not set or may be set according to the malfunctioning part when one side of the CAN bus wire opens
- a��: The combination meter and main body ECU indicate communication errors.

(b) without VSC SYSTEM





HINT:
- o: Set
- X: Not set or may be set according to the malfunctioning part when one side of the CAN bus wire becomes open.
- a��: The combination meter and main body ECU indicate communication errors.

(c) Perform troubleshooting depending on the combination of DTCs output.
HINT:
- ECM Communication Stop Mode ECM Communication Stop Mode
- Skid Control ECU Communication Stop Mode Skid Control ECU Communication Stop Mode
- Steering Angle Sensor Communication Stop Mode Steering Angle Sensor Communication Stop Mode
- Yaw Rate Sensor Communication Stop Mode Yaw Rate Sensor Communication Stop Mode
- Combination Meter ECU Communication Stop Mode Combination Meter ECU Communication Stop Mode
- Center Airbag Sensor Communication Stop Mode Center Airbag Sensor Communication Stop Mode
- Air Conditioner Amplifier ECU Communication Stop Mode Air Conditioning Amplifier Communication Stop Mode
- Main Body ECU Communication Stop Mode Main Body ECU Communication Stop Mode