Diagnosis System
NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM
DIAGNOSIS SYSTEM
1. ECUS OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM
(a) CAN No. 1 Bus
(1) ECM
(2) Main body ECU (Instrument panel junction block)
(3) Combination meter
(4) Power steering ECU
(5) Air conditioning amplifier
(6) Center airbag sensor assembly
(7) Skid control ECU (Brake actuator)
(8) Steering angle sensor
(9) Yaw rate sensor
(10) 4WD control ECU*1
(11) Certification ECU*2
(12) Power management control ECU*2
(b) CAN No. 2 Bus
(1) AFS ECU*3
(c) CAN MS Bus
(1) Back door motor unit (Power back door ECU)*4
(2) Back door closer ECU*5
HINT: *1: for AWD
*2: w/ Smart key system
*3: w/ HID headlight
*4: w/ Power back door system
*5: w/ Back door closer system (w/o Power back door 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"
HINT:
- DTC communication uses the CAN communication system.
- *1: The ECM is malfunctioning if only U0101 is output. Refer to SFI System (1AR-FE: U0101, 2GR-FE: U0101).
(b) TCM / Techstream Display "ECT"
HINT:
- DTC communication uses the CAN communication system.
- *2: The ECM is malfunctioning if only U0100 is output. Refer to Automatic Transaxle System (U760E: U0100, U760F: U0100, U660E: U0100, U660F: U0100).
(c) Main Body ECU (Instrument Panel Junction Block) / Techstream Display "Main Body"
HINT: DTC communication uses the CAN communication system.
(d) Power Steering ECU / Techstream Display "EPS"
HINT: DTC communication uses the CAN communication system.
(e) Air Conditioning Amplifier / Techstream Display "Air Conditioner"
HINT:
- DTC communication uses the CAN communication system.
- DTCs can be checked using the air conditioning control panel (DTC 99 is output).
(f) Combination Meter / Techstream Display "Combination Meter"
HINT: DTC communication uses the CAN communication system.
(g) 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.
(h) Skid control ECU (Brake Actuator) / 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) 4WD Control ECU / Techstream Display "Four Wheel Drive Control"
HINT: DTC communication uses the CAN communication system.
(l) Certification ECU / Techstream Display "Smart Access/ Smart Key/ Wireless Tuner"
HINT: DTC communication uses the CAN communication system.
(m) Power Management Control ECU / Techstream Display "Electric Power Control"
HINT:
- DTC communication uses the CAN communication system.
- "Electric Power Control" output DTC is communication error in CAN No. 1 bus.
(n) Power Management Control ECU / Techstream Display "Power Management1"
HINT:
- DTC communication uses the CAN communication system.
- "Power Management1" output DTC is communication error in CAN No. 2 bus.
(o) Power Management Control ECU / Techstream Display "Power Management2"
HINT:
- DTC communication uses the CAN communication system.
- "Power Management2" output DTC is communication error in power management bus.
(p) Power Back Door ECU (Back Door Motor Unit) / Techstream Display "Power 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.
(q) Back Door Closer ECU / Techstream Display "Power Back Door"
HINT: The back door closer ECU is connected to the CAN communication system, but CAN communication DTCs are not output.
(r) AFS ECU / Techstream Display "AFS/HL AutoLeveling"
HINT: The AFS 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 is stored only when both communications are simultaneously interrupted.
- *3: DTC is not output during communication error.
- *4: 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
- Air Conditioning Amplifier Communication Stop Mode Air Conditioning Amplifier 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
- 4WD Control ECU Communication Stop Mode 4WD Control ECU Communication Stop Mode
- Certification ECU Communication Stop Mode Certification ECU Communication Stop Mode
- Power Management Control ECU Communication Stop Mode Power Management Control ECU Communication Stop Mode