Diagnosis System

NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM

1. ECUS OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM

(a) CAN No. 1 Bus

(1) ECM

(2) Power management control ECU

(3) Combination meter

(4) Main body ECU

(5) Power steering ECU

(6) Center airbag sensor assembly

(7) Skid control ECU (Brake booster with master cylinder)

(8) Steering angle sensor

(9) Yaw rate sensor

(10) Certification ECU (Smart key ECU)

(11) Transmission control ECU

(12) Navigation ECU Sub-assembly*1*2

(13) Radio and display receiver assembly*2

(b) CAN No. 2 Bus

(1) Power management control ECU

(2) Driving support ECU*3

(3) Seat belt control ECU*4

(c) Power Management Bus

(1) Power management control ECU

(2) ECM

(3) Skid control ECU (Brake booster with master cylinder)

(4) Air conditioning amplifier

(d) Parking Assist Bus*3

(1) Driving support ECU

(2) Millimeter wave radar sensor

(3) Lane recognition camera sensor*5

HINT
*1: for Navigation receiver type

*2: for Radio and display type

*3: w/ Dynamic radar cruise control system

*4: w/ Pre-collision system

*5: w/ Lane-keeping assist system

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

(a) The systems (ECUs and sensors) that adopt CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed on the vehicle.

3. CAN BUS CHECK

HINT
The ECUs and sensors that are properly connected to the CAN communication system can be displayed using the Techstream.

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

4. 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) Power Management Control ECU / Techstream Display "Hybrid Control"

HINT
* DTC communication uses the CAN communication system.
* *1: Dynamic radar cruise control system DTC

(b) Power Management Control ECU / Techstream Display "Electric Power Control"

HINT
* DTC communication uses the CAN communication system.
* *2: If U0293 is output alone, CAN communication is normal. Refer to Smart Key System Smart Key System (for Start Function).

(c) Power Management Control ECU / Techstream Display "Power Management1"

HINT
* DTC communication uses the CAN communication system.
* "Power Management1" output DTC is communication error in the CAN No. 2 bus.

(d) Power Management Control ECU / Techstream Display "Power Management2"

HINT
* DTC communication uses the CAN communication system.
* "Power Management2" output DTC is communication error in the power management bus.

(e) ECM / Techstream Display "Engine"

HINT
DTC communication uses the CAN communication system.

(f) Transmission Control ECU / Techstream Display "Transmission Control"

HINT
DTC communication uses the CAN communication system.

(g) Power Steering ECU / Techstream Display "EPS"

HINT
DTC communication uses the CAN communication system.

(h) Skid control ECU (Brake booster with master cylinder) / Techstream Display "ABS/VSC/TRAC"

HINT
DTC communication uses the CAN communication system.

(i) Steering Angle Sensor / Techstream Display "Steering Angle Sensor"

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

(j) Yaw Rate Sensor / Techstream Display "Yaw Rate / Deceleration Sensor"

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

(k) Center Airbag Sensor Assembly / Techstream Display "SRS Airbag"

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

(l) Main Body ECU (w/ LED Headlight System or w/ Remote Air Conditioning System)/ Techstream Display "Main Body"

HINT
DTC communication uses the CAN communication system.

(m) Main Body ECU (w/o LED Headlight System and w/o Remote Air Conditioning System)/ Techstream Display "Main Body"

HINT
The main body ECU (w/o LED Headlight System and w/o Remote Air Conditioning System) is connected to the CAN communication system, but CAN communication DTCs are not output.

(n) Certification ECU / Techstream Display "Smart Access/ Smart Key/ Wireless Tuner"

HINT
DTC communication uses the CAN communication system.

(o) Air Conditioning Amplifier / Techstream Display "Air Conditioner"

HINT
DTC communication uses the CAN communication system.

(p) Combination Meter / Techstream Display "Combination Meter"

HINT
DTC communication uses the CAN communication system.

(q) Navigation ECU sub-assembly (for Navigation receiver type and for Radio and Display Type) / Techstream Display "AVN1"

HINT
DTC communication uses the CAN communication system.

(r) Radio and Display Receiver Assembly (for Radio and Display Type) / Techstream Display "AVN1"

HINT
DTC communication uses the CAN communication system.

(s) Seat Belt Control ECU / Techstream Display "Pre-Collision1"

HINT
DTC communication uses the CAN communication system.

(t) Driving Support ECU / Techstream Display "Pre-Collision2"

HINT
* DTC communication uses the CAN communication system.
* *3: If U0235 or U1119 is output alone, CAN communication is normal. Refer to Dynamic Radar Cruise Control System Dynamic Radar Cruise Control System.

(u) Driving Support ECU / Techstream Display "Cruise Control (ACC)"

HINT
* DTC communication uses the CAN communication system.
* *3: If U0235 is output alone, CAN communication is normal. Refer to Dynamic Radar Cruise Control System Dynamic Radar Cruise Control System.
* *4: If U1119 is output alone, CAN communication is normal. Refer to Lane-keeping Assist System Lane-Keeping Assist System.

(w) Millimeter Wave Radar Sensor

HINT
The millimeter wave radar sensor is connected to the CAN communication system, but CAN communication DTCs are not output.

(x) Lane Recognition Camera Sensor

HINT
The lane recognition camera sensor is connected to the CAN communication system, but CAN communication DTCs are not output.

5. DTC COMBINATION TABLE

(a) CAN No. 1 Bus

HINT
* o: Set
* X: Not set or may be set according to the malfunctioning part when one side of the CAN branch wire opens.
* *1: DTC is not output during communication error, but will be output as a history DTC (past DTC) when communication returns to normal.
* *2: DTC U0100, U0123, U0124 and U0126 are not stored when DTC U0073 has already been stored.
* *3: w/ LED headlight system or w/ remote air conditioning system
* *4: for Navigation receiver type
* *5: for Radio and display type
* *6: If the power management bus circuit is normal
* *7: If the CAN No. 2 bus circuit is normal
* Skid Control ECU Communication Stop Mode 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
* Transmission Control ECU Communication Stop Mode Transmission Control ECU Communication Stop Mode
* Main Body ECU Communication Stop Mode Main Body ECU 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
* Certification ECU Communication Stop Mode Certification ECU Communication Stop Mode
* Power Management ECU Communication Stop Mode Power Management Control ECU Communication Stop Mode
* Navigation ECU Communication Stop Mode Navigation ECU Communication Stop Mode
* Audio Receiver Assembly Communication Stop Mode Audio Receiver Assembly Communication Stop Mode