Diagnosis System

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM

1. CAN BUS CHECK

(a) Using the Techstream, select "CAN Bus Check" from "System Select".

2. CHECK INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION

(a) 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 Techstream.
* 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" How to Proceed With Troubleshooting.
(a) BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)

HINT
DTC communication uses the CAN communication system.

(b) POWER STEERING ECU ASSEMBLY

HINT
DTC communication uses the CAN communication system.

(d) AIR CONDITIONING AMPLIFIER ASSEMBLY

For vehicles with air conditioning (Automatic air conditioning system or manual air conditioning system).

HINT
DTC communication uses the CAN communication system.

(e) COMBINATION METER ASSEMBLY (COMBINATION METER ECU)

HINT
DTC communication uses the CAN communication system.

(f) 4WD CONTROL ECU ASSEMBLY

For vehicles with 4WD only.

HINT
DTC communication uses the CAN communication system.

(g) MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)

For vehicles with the smart key system.

HINT
DTC communication uses the CAN communication system.

(h) For vehicles without the smart key system.

HINT
The main body ECU (driver side junction block) is connected to the CAN communication system but CAN communication DTCs are not output.

(i) CENTER AIRBAG SENSOR ASSEMBLY

HINT
The center airbag sensor assembly is connected to the CAN communication system but CAN communication DTCs are not output.

(j) STEERING ANGLE SENSOR

HINT
The steering angle sensor is connected to the CAN communication system but CAN communication DTCs are not output.

(k) YAW RATE SENSOR ASSEMBLY

HINT
The yaw rate sensor assembly is connected to the CAN communication system but CAN communication DTCs are not output.

(l) ECU AGGREGATION BOX ASSEMBLY (CERTIFICATION ECU)

HINT
The ECU aggregation box (certification ECU) is connected to the CAN communication system but CAN communication DTCs are not output.

4. DTC COMBINATION TABLE

HINT
* o: Stored.
* X: When one side of branch wire is open, storage may occur.
* -: Not stored.
* *1: Only stored when communication recovery has occurred. During communication stop, this DTC cannot be stored.
* *2: : Only stored when air conditioning amplifier is malfunctioning.
* *3: Only stored when communication with ECM and combination meter ECU stop simultaneously.
(a) Perform troubleshooting according to the combination of DTCs output.

* ABS and Traction Actuator (Skid Control ECU) Communication Stop Mode: ABS and Traction Actuator (Skid Control ECU) Communication Stop Mode

* Power Steering ECU Communication Stop Mode: Power Steering 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

* ECM Communication Stop Mode: ECM 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

* 4WD Control ECU Communication Stop Mode: 4WD Control ECU Communication Stop Mode