Diagnosis System

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM

DIAGNOSIS SYSTEM

1. BUS CHECK
(a) Using the Techstream, Select "CAN Bus Check" from the "System Select".
2. CHECK FOR INSTALLED SYSTEMS (ECUS & SENSORS) THAT USE CAN COMMUNICATION
(a) Systems (ECUs, sensors) that use 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 can be displayed by the ECU using the 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
HINT: DTC communication uses the CAN communication system.

HINT: *: The ECM is malfunctioning if U0001 is output alone. Replace the ECM.

(b) HYBRID VEHICLE CONTROL ECU
HINT: DTC communication uses the CAN communication system.

HINT:
- *1: U0293 is output when an error occurs in communication from the hybrid vehicle control ECU to the distance control ECU.
- *2: U0293 is output when an error occurs in communication from the hybrid vehicle control ECU to the skid control ECU.
- *3: U1101 is output when an error occurs in communication from the distance control ECU to the hybrid vehicle control ECU.

(c) SKID CONTROL ECU
HINT: DTC communication uses the CAN communication system.

(d) ABSORBER CONTROL ECU
HINT: DTC communication uses the SIL line.

(e) POWER STEERING ECU
HINT: DTC communication uses the SIL line.

(f) SEAT BELT CONTROL ECU
HINT: DTC communication uses the SIL line.

HINT: *: The Techstream's "CODES ALL" screen will be displayed. However, when only U0235 and U1102 are output, the CAN communication is not malfunctioning U0235-737.

(g) STEERING CONTROL ECU
HINT: DTC communication uses the SIL line.

(h) ACTIVE STABILIZER CONTROL ECU
For vehicle with active stabilizer suspension system only.
HINT: DTC communication uses the SIL line.

(i) NETWORK GATEWAY ECU
HINT: The network gateway ECU is connected to the CAN communication system but CAN communication DTCs are not output.

(j) DISTANCE CONTROL ECU
HINT: The distance control ECU is connected to the CAN communication system but CAN communication DTCs are not output.

4. DTC COMBINATION TABLE

HINT:
- o: Output
- □: Outputs under the following condition
- X: Not output or may be output according to the malfunction part when one side of the CAN bus line opens

HINT:
- o: Output
- ▲: Only when one side has an open circuit
- X: Not output or may be output according to the malfunction part when one side of the CAN bus line opens
- *: When CAN No. 2 communication error other than ECM error, a DTC is stored
- Check the stop mode by using the results of the BUS CHECK for the clearance warning ECU Clearance Warning ECU Communication Stop Mode and the distance control ECU Distance Control ECU Communication Stop Mode.

(a) Perform troubleshooting according to the combination of DTCs output.
- ECM COMMUNICATION STOP MODE: ECM Communication Stop Mode
- SKID CONTROL ECU COMMUNICATION STOP MODE: CAN Communication System
- YAW RATE SENSOR COMMUNICATION STOP MODE: CAN Communication System
- STEERING ANGLE SENSOR COMMUNICATION STOP MODE: [1][2]CAN Communication System
- SEAT BELT CONTROL ECU COMMUNICATION STOP MODE: Seat Belt Control ECU Communication Stop Mode
- STEERING CONTROL ECU COMMUNICATION STOP MODE: [1][2]CAN Communication System
- ABSORBER CONTROL ECU COMMUNICATION STOP MODE: U0132
- NETWORK GATEWAY ECU COMMUNICATION STOP MODE: Gateway ECU Communication Stop Mode
- POWER STEERING ECU COMMUNICATION STOP MODE: U0131-433
- HYBRID VEHICLE CONTROL ECU COMMUNICATION STOP MODE: Hybrid Vehicle Control ECU Communication Stop Mode
- FRONT ACTIVE STABILIZER CONTROL ECU COMMUNICATION STOP MODE: U1108.
- REAR ACTIVE STABILIZER CONTROL ECU COMMUNICATION STOP MODE: U1109.