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) Main body ECU (Multiplex network body ECU)
(3) Combination meter
(4) Power steering ECU
(5) Center airbag sensor assembly
(6) Skid control ECU
(7) Steering angle sensor
(8) Yaw rate sensor
(9) Certification ECU (Smart key ECU)
(10) Power management control ECU
(11) Navigation ECU (Display and navigation module display)*1
(b) CAN No. 2 Bus
(1) Power management control ECU
(2) AFS ECU (Headlight swivel ECU)
(3) Suspension control ECU*2
(4) Driving support ECU*3
(5) Seat belt control ECU*4
(6) Parking assist ECU*5
(7) Clearance warning ECU*6
(c) CAN MS Bus
(1) Main body ECU (Multiplex network body ECU)
(2) Tilt and telescopic ECU (Multiplex tilt and telescopic ECU)
(3) Outer mirror control ECU RH
(4) Outer mirror control ECU LH
(5) Front power seat switch LH*7
(6) Power back door ECU (Back door motor unit)*8
(7) Tire pressure monitor ECU*9
(d) Power Management Bus
(1) Air conditioning amplifier
(2) Power management control ECU
(3) ECM
(4) Skid control ECU
HINT
*1: w/ Navigation system
*2: w/ Air suspension system
*3: w/ Dynamic radar cruise control system
*4: w/ Pre-collision system
*5: w/ Side monitor system
*6: w/o Side monitor system
*7: w/ Position memory system
*8: w/ Power back door system
*9: w/ Tire pressure warning 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) ECM / Techstream Display "Engine and ECT"
HINT
DTC communication uses the CAN communication system.
(b) Main Body ECU (Multiplex Network Body ECU) / Techstream Display "Main Body"
HINT
DTC communication uses the CAN communication system.
(c) Combination Meter / Techstream Display "Combination Meter"
HINT
DTC communication uses the CAN communication system.
(d) Power Steering ECU / Techstream Display "EMPS"
HINT
DTC communication uses the CAN communication system.
(e) 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.
(f) Skid control ECU / Techstream Display "ABS/VSC/TRAC"
HINT
DTC communication uses the CAN communication system.
(g) Steering Angle Sensor
HINT
The steering angle sensor is connected to the CAN communication system, but CAN communication DTCs are not output.
(h) Yaw Rate Sensor
HINT
The yaw rate and acceleration sensor is connected to the CAN communication system, but CAN communication DTCs are not output.
(i) Certification ECU / Techstream Display "Smart Access"
HINT
DTC communication uses the CAN communication system.
(j) Navigation ECU (Display and navigation module display) / Techstream Display "Navigation System"
HINT
DTC communication uses the CAN communication system.
(k) Power Management Control ECU / Techstream Display "Power Source Control"
HINT
* DTC communication uses the CAN communication system.
* *1: If U0293 is output, Smart Access System With Push-Button Start (for Start Function).
(l) Power Management Control ECU / Techstream Display "PM1 Gateway"
HINT
* DTC communication uses the CAN communication system.
* "PM1 Gateway" output DTC is communication error in the CAN No. 2 bus.
(m) Power Management Control ECU / Techstream Display "PM2 Gateway"
HINT
* DTC communication uses the CAN communication system.
* "PM2 Gateway" output DTC is communication error in the power management bus.
(n) Power Management Control ECU / Techstream Display "Hybrid Control"
HINT
* DTC communication uses the CAN communication system.
* *2: Cruise control system DTC.
* *3: Dynamic radar cruise control system DTC.
(o) Air Conditioning Amplifier / Techstream Display "Air Conditioner"
HINT
DTC communication uses the CAN communication system.
(p) AFS ECU (Headlight swivel ECU) / Techstream Display "AFS"
HINT
DTC communication uses the CAN communication system.
(q) Suspension Control ECU / Techstream Display "Air Suspension"
HINT
DTC communication uses the CAN communication system.
(r) Driving Support ECU / Techstream Display "Radar Cruise"
HINT
* DTC communication uses the CAN communication system.
* *4: If U1104 is output, Dynamic Radar Cruise Control System.
(s) Seat Belt Control ECU / Techstream Display "Pre-Collision"
HINT
DTC communication uses the CAN communication system.
(t) Driving Support ECU / Techstream Display "Pre-Collision2"
HINT
* DTC communication uses the CAN communication system.
* *5: If U0235 is output, Pre-Collision System.
* *6: If U1104 is output, Pre-Collision System.
(u) Parking Assist ECU / Techstream Display "Parking Assist Monitor System"
HINT
DTC communication uses the CAN communication system.
(v) Clearance Warning ECU / Techstream Display "Intuitive P/A"
HINT
DTC communication uses the CAN communication system.
(w) Tilt and telescopic ECU (Multiplex Tilt and Telescopic ECU) / Techstream Display "Tilt and Telescopic"
HINT
The multiplex tilt and telescopic ECU is connected to the CAN communication system, but CAN communication DTCs are not output.
(x) Outer Mirror Control ECU RH / Techstream Display "Mirror R"
HINT
DTC communication uses the CAN communication system.
(y) Outer Mirror Control ECU LH / Techstream Display "Mirror L"
HINT
DTC communication uses the CAN communication system.
(z) Front power seat switch LH / Techstream Display "Driver Seat"
HINT
The front power seat switch LH is connected to the CAN communication system, but CAN communication DTCs are not output.
(aa) Power Back Door ECU (Back Door Motor Unit) / Techstream Display "Back Door"
HINT
The back door motor unit (power back door ECU) is connected to the CAN communication system, but CAN communication DTCs are not output.
(ab) Tire pressure monitor ECU / Techstream Display "Tire Pressure Monitor"
HINT
The tire pressure monitor ECU 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.
* 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
* 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