Diagnosis System

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM

DIAGNOSIS SYSTEM

1. BUS CHECK
(a) Select "CAN Bus Check" from the "System Select" screen on the Techstream.
HINT: If any properly connected ECUs or sensors are not displayed, there is a communication stop in the system Symptom Related Diagnostic Procedures.
Display the "Communication Bus Check" screen for approximately 1 minute and check for ECUs and sensors that are not indicated on the screen.

2. CHECK INSTALLED SYSTEMS (ECUS AND SENSORS) THAT ADOPT CAN COMMUNICATION
(a) Systems (ECUs and sensors) that adopt CAN communication vary depending on the vehicle's optional settings. Check which systems (ECUs, 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 a Techstream.
- If CAN communication system DTCs are output, trouble cannot be determined solely from the DTCs. Perform troubleshooting according to "HOW TO PROCEED WITH TROUBLESHOOTING" How to Proceed With Troubleshooting.

(a) BRAKE ACTUATOR (SKID CONTROL ECU)
HINT: DTC communication uses the CAN communication system.





(b) POWER STEERING ECU
HINT: DTC communication uses the SIL Line.





*: w/ ABS
(c) COMBINATION METER ASSEMBLY
HINT: DTC communication uses the CAN communication system.





*: w/ ABS
(d) AIR CONDITIONING AMPLIFIER
HINT: DTC communication uses the CAN communication system.





(e) MAIN BODY ECU
HINT:
- The main body ECU is connected to the CAN communication system but CAN communication DTCs are not output.
- If "Main Body" is not displayed on the "Communication Bus Check" screen on the Techstream, proceed to "Main Body ECU Communication Stop Mode." Main Body ECU Communication Stop Mode

(f) CENTER AIRBAG SENSOR ASSEMBLY
HINT:
- The center airbag sensor assembly is connected to the CAN communication system but CAN communication DTCs are not output.
- If "SRS Airbag" is not displayed on the "Communication Bus Check" screen on the Techstream, proceed to "Center Airbag Sensor Communication Stop Mode." Center Airbag Sensor Communication Stop Mode

(g) ECM
HINT:
- The ECM is connected to the CAN communication system but CAN communication DTCs are not output.
- If ""Engine" is not displayed on the "Communication Bus Check" screen on the Techstream, proceed to "ECM Communication Stop Mode." ECM Communication Stop Mode

4. DTC COMBINATION TABLE






*1: This DTC may not be output when the CAN communication system malfunctions.
*2: This DTC is output when communication failures from the ECM and the combination meter ECU occur.
*3: w/ ABS.
HINT:
- o: It is necessary to check for the trouble mode.
- X: Not output

(a) Perform troubleshooting according to the combination of DTCs output.
HINT:
- Brake Actuator (Skid Control ECU) Communication Stop Mode: Brake Actuator (Skid Control ECU) Communication Stop Mode
- Power Steering ECU Communication Stop Mode: Power Steering ECU Communication Stop Mode
- ECM Communication Stop Mode: ECM Communication Stop Mode
- Center Airbag Sensor Communication Stop Mode: Center Airbag Sensor Communication Stop Mode
- Air Conditioning Amplifier Communication Stop Mode: Air Conditioning Amplifier Communication Stop Mode
- Combination Meter ECU Communication Stop Mode: Combination Meter ECU Communication Stop Mode
- Main Body ECU Communication Stop Mode: Main Body ECU Communication Stop Mode