Diagnosis System
WARNING: This page is about a different car, the 2012 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
- CAN BUS CHECK
- Using the Techstream, select "CAN Bus Check" from the "System Select".
- CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT ADOPT CAN COMMUNICATION
- Systems (ECUs, sensors) that adopt CAN communication vary depending on the vehicle and optional settings. Check which systems (ECUs, sensors) are installed on the vehicle.
HINT:
ECUs and sensors that are connected to the LIN communication system and the local CAN system are also displayed.
ECU/Sensor Name Applicability ECM Installed on all vehicles Combination meter Installed on all vehicles Air conditioning amplifier Installed on all vehicles Center airbag sensor Installed on all vehicles Power steering ECU Installed on all vehicles Main body ECU Installed on all vehicles Skid control ECU Installed on all vehicles Steering angle sensor Vehicles with VSC Yaw rate sensor Vehicles with VSC Certification ECU Vehicles with Smart key system
- Systems (ECUs, sensors) that adopt CAN communication vary depending on the vehicle and optional settings. Check which systems (ECUs, sensors) are installed on the vehicle.
- 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. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .
- SKID CONTROL ECU (w/o VSC)
HINT:
DTC communication uses the CAN communication system.
DTC No. Detection Item U0073 Control Module Communication Bus Off - SKID CONTROL ECU (w/ VSC)
HINT:
DTC communication uses the CAN communication system.
DTC No. Detection Item U0073 Control Module Communication Bus Off U0100 Lost Communication with ECM/PCM "A" U0123 Lost Communication with Yaw Rate Sensor Module U0124 Lost Communication with Lateral Acceleration Sensor Module U0126 Lost Communication with Steering Angle Sensor Module - AIR CONDITIONING AMPLIFIER
HINT:
- DTC communication uses the CAN communication system.
- The following DTC is output only for current malfunctions.
DTC No. Detection Item B1499 Multiplex Communication Circuit - COMBINATION METER
HINT:
DTC communication uses the CAN communication system.
DTC No. Detection Item U0100 Lost Communication with ECM/PCM "A" U0129 Lost Communication with Brake System Control Module - POWER STEERING ECU
HINT:
DTC communication uses the CAN system.
DTC No. Detection Item U0100 Lost Communication with ECM U0129 Lost Communication with Anti-lock Brake System (ABS) Control Module - MAIN BODY ECU
HINT:
DTC communication uses the CAN system.
DTC No. Detection Item U0327 Software Incompatibility with Vehicle Security Control Module U1002 Lost Communication with Gateway Module - ECM (for 2AZ-FE)
HINT:
DTC communication uses the CAN communication system.
DTC No. Detection Item U0129 Lost Communication with Brake System Control Module - ECM (for 2ZR-FE)
HINT:
The ECM is connected to the CAN communication system, but CAN communication DTCs are not output.
- CENTER AIRBAG SENSOR
HINT:
The center airbag sensor is connected to the CAN communication system, but CAN communication DTCs are not output.
- STEERING ANGLE SENSOR (w/ VSC)
HINT:
The steering angle sensor is connected to the CAN communication system, but CAN communication DTCs are not output.
- YAW RATE SENSOR (w/ VSC)
HINT:
The yaw rate sensor is connected to the CAN communication system, but CAN communication DTCs are not output.
- CERTIFICATION ECU
HINT:
The certification ECU is connected to the CAN communication system, but CAN communication DTCs are not output.
- DTC COMBINATION TABLE
- CAN No. 1 Bus (w/o VSC)
DTC Trouble Mode Output from Output DTC ECM Communication Stop Mode Skid Control ECU Communication Stop Mode Power Steering ECU Communication Stop Mode Center Airbag Sensor Communication Stop Mode Air Conditioning Amplifier Communication Stop Mode Combination Meter ECU Communication Stop Mode Main Body ECU Communication Stop Mode Skid Control ECU U0073 X ◦*1 X X X X X Combination Meter U0100 ◦ X X X X ◦*1 X U0129 X ◦ X X X ◦*1 X Power Steering ECU U0100 ◦ X ◦*1 X X X X U0129 X ◦ ◦*1 X X X X Air Conditioning B1499 ◦*2, *3 X X X ◦*2, *3 X X ECM (for 2AZ-FE) U0129 ◦*1 ◦ X X X X X HINT:
- ◦: Set
- X: Not set or may be set according to the malfunctioning part when one side of the CAN bus wire opens
- *1: DTC is not output during communication error
- *2: Only current DTCs are output
- *3: Stored only when there is a communication error between the ECM and combination meter
- CAN No. 1 Bus (w/ VSC)
DTC Trouble Mode Output from Output DTC ECM Communication Stop Mode Skid Control ECU Communication Stop Mode Steering Angle Sensor Communication Stop Mode Yaw Rate Sensor Communication Stop Mode Power Steering ECU Communication Stop Mode Skid Control ECU U0073 X ◦*1 X X X U0100 ◦ ◦*1 X X X U0123 X ◦*1 X ◦ X U0124 X ◦*1 X ◦ X U0126 X ◦*1 ◦ X X Combination Meter U0100 ◦ X X X X U0129 X ◦ X X X Power Steering ECU U0100 ◦ X X X ◦*1 U0129 X ◦ X X ◦*1 Air Conditioning B1499 ◦*2, *3 X X X X ECM (for 2AZ-FE) U0129 ◦*1 ◦ X X X HINT:
- ◦: Set
- X: Not set or may be set according to the malfunctioning part when one side of the CAN bus wire opens
- *1: DTC is not output during communication error
- *2: Only current DTCs are output
- *3: Stored only when there is a communication error between the ECM and combination meter
DTC Trouble Mode Output from Output DTC Center Airbag Sensor Communication Stop Mode Air Conditioning Amplifier Communication Stop Mode Combination Meter ECU Communication Stop Mode Main Body ECU Communication Stop Mode Skid Control ECU U0073 X X X X U0100 X X X X U0123 X X X X U0124 X X X X U0126 X X X X Combination Meter U0100 X X ◦*1 X U0129 X X ◦*1 X Power Steering ECU U0100 X X X X U0129 X X X X Air Conditioning B1499 X ◦*2, *3 X X ECM (for 2AZ-FE) U0129 X X X X HINT:
- ◦: Set
- X: Not set or may be set according to the malfunctioning part when one side of the CAN bus wire opens
- *1: DTC is not output during communication error
- *2: Only current DTCs are output
- *3: Output CAN communication interruption of engine and meter
- ECM Communication Stop Mode. Refer to ECM Communication Stop Mode
- Skid Control ECU Communication Stop Mode. Refer to Skid Control ECU Communication Stop Mode
- Steering Angle Sensor Communication Stop Mode. Refer to Steering Angle Sensor Communication Stop Mode
- Yaw Rate Sensor Communication Stop Mode. Refer to Yaw Rate Sensor Communication Stop Mode
- Combination Meter Communication Stop Mode. Refer to Combination Meter ECU Communication Stop Mode
- Air Conditioning Amplifier Communication Stop Mode. Refer to Air Conditioning Amplifier Communication Stop Mode
- Center Airbag Sensor Communication Stop Mode. Refer to Center Airbag Sensor Communication Stop Mode
- Power Steering ECU Communication Stop Mode. Refer to Power Steering ECU Communication Stop Mode
- Main Body ECU Communication Stop Mode. Refer to Main Body ECU Communication Stop Mode
- CAN No. 1 Bus (w/o VSC)