DESCRIPTION
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| U0100 | No communication from the ECM continues. | ECM main wire or connector Power source circuit of ECM ECM |
HINT
The diagnosis procedure is for when DTC U0100 is output by the power management control ECU (Techstream display: Power Management2).
Scheme 114
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| U0104 | No communication from the driving support ECU continues. | Driving support ECU branch wire or connector Power source circuit of driving support ECU Driving support ECU |
HINT
The diagnosis procedure is for when DTC U0104 is output by the power management control ECU (Techstream display: Power Management1).
Scheme 115
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| U0129 | No communication from the skid control ECU continues. | Skid control ECU branch wire or connector Power source circuit of skid control ECU Skid control ECU (Brake booster with master cylinder) |
HINT
The diagnosis procedure is for when DTC U0129 is output by the power management control ECU (Techstream display: Power Management2).
Scheme 116
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| U0164 | No communication from the air conditioning amplifier continues. | Air conditioning amplifier branch wire or connector Power source circuit of air conditioning amplifier Air conditioning amplifier |
HINT
The diagnosis procedure is for when DTC U0164 is output by the power management control ECU (Techstream display: Power Management2).
Scheme 117
The driving support ECU will store this DTC when no signals can be received from the ECUs that have been memorized as those that are connected to the parking assist bus.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| U1002 | Driving support ECU cannot receive signals from all ECUs that have been memorized as those connected to the parking assist bus. | Open or short in parking assist bus main wire or connector Open or short in parking assist bus branch wire or connector Driving support ECU Lane recognition camera sensor Millimeter wave radar sensor CAN No. 5 junction connector |
HINT
The diagnosis procedure is for when DTC U1002 is output by the driving support ECU (Techstream display: Pre-Collision2).
Scheme 118
- The power management control ECU will store this DTC when no signals can be received from the ECUs that have been memorized as those that are connected to the CAN No. 2 bus.
- When the power management control ECU receives a response signal from the ECUs connected to the CAN No. 2 bus, the power management control ECU recognizes and memorizes that the ECU is connected to the CAN No. 2 bus. Based on this memorized data, the power management control ECU monitors for malfunctions in the ECUs connected to the CAN No. 2 bus when communicating with those ECUs. If the power management control ECU cannot receive response signals from the ECUs that have been memorized as those connected to the CAN No. 2 bus, the power management control ECU determines that a malfunction exists.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| U1002 | Power management control ECU cannot receive signals from all ECUs that have been memorized as those connected to the CAN No. 2 bus. | Open or short in CAN No. 2 bus main wire or connector Open or short in CAN No. 2 bus branch wire or connector Power management control ECU Driving support ECU Seat belt control ECU CAN No. 3 junction connector |
HINT
The diagnosis procedure is for when DTC U1002 is output by the power management control ECU (Techstream display: Power Management1).
Scheme 119
- The power management control ECU will store this DTC when no signals can be received from the ECUs that have been memorized as those that are connected to the power management bus.
- When the power management control ECU receives a response signal from the ECUs connected to the power management bus, the power management control ECU recognizes and memorizes that the ECU is connected to the power management bus. Based on this memorized data, the power management control ECU monitors for malfunctions in the ECUs connected to the power management bus when communicating with those ECUs. If the power management control ECU cannot receive response signals from the ECUs that have been memorized as those connected to the power management bus, the power management control ECU determines that a malfunction exists.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| U1002 | Power management control ECU cannot receive signals from all ECUs that have been memorized as those connected to the power management bus. | Open or short in power management bus main wire or connector Open or short in power management bus branch wire or connector Power management control ECU ECM Air conditioning amplifier Skid control ECU (Brake booster with master cylinder) CAN No. 4 junction connector |
HINT
The diagnosis procedure is for when DTC U1002 is output by the power management control ECU (Techstream display: Power Management2).
Scheme 120
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| U1100 | No communication from the seat belt control ECU continues. | Seat belt control ECU branch wire or connector Power source circuit of seat belt control ECU Seat belt control ECU |
HINT
The diagnosis procedure is for when DTC U1100 is output by the power management control ECU (Techstream display: Power Management1).
Scheme 121
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| Skid Control ECU Communication Stop Mode | "ABS/VSC/TRAC" is not displayed on "CAN Bus Check" screen of the Techstream. Applies to Skid Control ECU Communication Stop Mode in DTC Combination Table. | Skid control ECU branch wire or connector Power source circuit of skid control ECU Skid control ECU (Brake booster with master cylinder) |
Scheme 122
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| Power Steering ECU Communication Stop Mode | "EPS" is not displayed on "CAN Bus Check" screen of the Techstream. Applies to Power Steering ECU Communication Stop Mode in DTC Combination Table. | Power steering ECU branch wire or connector Power source circuit of power steering ECU Power steering ECU |
Scheme 123
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| Steering Angle Sensor Communication Stop Mode | "Steering Angle Sensor" is not displayed on "CAN Bus Check" screen of the Techstream. Applies to Steering Angle Sensor Communication Stop Mode in DTC Combination Table. | Steering angle sensor branch wire or connector Power source circuit of steering angle sensor Steering angle sensor |
Scheme 124
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| Yaw Rate Sensor Communication Stop Mode | "Yaw Rate/Decelerate Sensor" is not displayed on "CAN Bus Check" screen of the Techstream. Applies to Yaw Rate Sensor Communication Stop Mode in DTC Combination Table. | Yaw rate sensor branch wire or connector Power source circuit of yaw rate sensor Yaw rate sensor |
Scheme 125
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| ECM Communication Stop Mode | "Engine" and "ECT" are not displayed on "CAN Bus Check" screen of the Techstream. Applies to ECM Communication Stop Mode in DTC Combination Table. | Power source circuit of ECM ECM main wire or connector ECM |
Scheme 126
The transmission control ECU drives the parking lock actuator in accordance with signals from the power management control ECU.
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| Transmission Control ECU Communication Stop Mode | "Transmission Control " is not displayed on "CAN Bus Check" screen of the Techstream. Applies to Transmission Control Communication Stop Mode in DTC Combination Table. | Transmission control ECU branch wire or connector Power source circuit of transmission control ECU Transmission control ECU |
Scheme 127
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| Main Body ECU Communication Stop Mode | "Main Body" is not displayed on "CAN Bus Check" screen of the Techstream. Applies to Main Body ECU Communication Stop Mode in DTC Combination Table. | Main body ECU branch wire or connector Power source circuit of main body ECU Main body ECU |
Scheme 128
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| Power Management Control ECU Communication Stop Mode | "Electric Power Control" is not displayed on the CAN Bus Check screen of the Techstream. Applies to Power Management Control ECU Communication Stop Mode in DTC Combination Table. | Power management control ECU branch wire or connector Power source circuit of power management control ECU Power management control ECU |
Scheme 129
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| Combination Meter ECU Communication Stop Mode | "Combination Meter" is not displayed on "CAN Bus Check" screen of the Techstream. Applies to Combination Meter ECU Communication Stop Mode in DTC Combination Table. | Combination meter main wire or connector Power source circuit of combination meter Combination meter |
Scheme 130
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| Certification ECU Communication Stop Mode | "Smart Access/Smart Key/Wireless Tuner" is not displayed on "CAN Bus Check" screen of the Techstream. Applies to Certification ECU Communication Stop Mode in DTC Combination Table. | Power source circuit of certification ECU Certification ECU branch wire or connector Certification ECU |
Scheme 131
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| Center Airbag Sensor Communication Stop Mode | "SRS Airbag" is not displayed on "CAN Bus Check" screen of the Techstream. Applies to Center Airbag Sensor Communication Stop Mode in DTC Combination Table. | Center airbag sensor assembly branch wire or connector Power source circuit of center airbag sensor assembly Center airbag sensor assembly |
Scheme 132
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| Navigation ECU Communication Stop Mode | "AVN1" is not displayed on the "CAN Bus Check" screen of the Techstream Applies to Navigation ECU Communication Stop Mode in DTC Combination Table | Navigation ECU sub-assembly branch wire or connector Power source circuit of navigation ECU sub-assembly Navigation ECU sub-assembly |
Scheme 133
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| Audio Receiver Assembly Communication Stop Mode | "AVN1" is not displayed on the "CAN Bus Check" screen of the Techstream Applies to Audio Receiver Assembly Communication Stop Mode in DTC Combination Table | Radio and display receiver assembly branch wire or connector Power source circuit of radio and display receiver assembly Radio and display receiver assembly |
Scheme 134
Scheme 135
There may be an open circuit in the CAN bus main wire and/or the DLC3 branch wire when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 70 ohms or higher.
| Symptom | Trouble Area |
|---|---|
| Resistance between terminals 6 (CANH) and 14 (CANL) of DLC3 is 70 ohms or higher. | DLC3 branch wire or connector CAN bus main wire or connector Combination meter ECM CAN No. 1 junction connector CAN No. 2 junction connector |
Scheme 136
There may be a short circuit in the CAN bus main wire and/or CAN branch wire when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 ohms.
| Symptom | Trouble Area |
|---|---|
| Resistance between terminals 6 (CANH) and 14 (CANL) of DLC3 is below 54 ohms. | Short in CAN bus main wire Short in CAN bus branch wire Power management control ECU ECM Main body ECU Combination meter Skid control ECU (Brake booster with master cylinder) Steering angle sensor Yaw rate sensor Power steering ECU Center airbag sensor assembly Transmission control ECU Certification ECU (Smart key ECU) Navigation ECU sub-assembly*1*2 Radio and display receiver assembly*2 CAN No. 1 junction connector CAN No. 2 junction connector |
*1: for Navigation receiver type
*2: for Radio and display type
Scheme 137
Scheme 138
There may be a short circuit between the CAN bus main wire and +B when no resistance exists between terminals 6 (CANH) and 16 (BAT) or 14 (CANL) and 16 (BAT) of the DLC3.
| Symptom | Trouble Area |
|---|---|
| No resistance exists between terminals 6 (CANH) and 16 (BAT) or 14 (CANL) and 16 (BAT) of DLC3. | Short to +B in CAN bus main wire Short to +B in CAN bus branch wire Power management control ECU ECM Main body ECU Combination meter Skid control ECU (Brake booster with master cylinder) Steering angle sensor Yaw rate sensor Power steering ECU Center airbag sensor assembly Transmission control ECU Certification ECU (Smart key ECU) Navigation ECU sub-assembly*1*2 Radio and display receiver assembly*2 CAN No. 1 junction connector CAN No. 2 junction connector |
*1: for Navigation receiver type
*2: for Radio and display type
There may be a short circuit between the CAN bus main wire and GND when there is no resistance between terminals 6 (CANH) and 4 (CG) or 14 (CANL) and 4 (CG) of the DLC3.
| Symptom | Trouble Area |
|---|---|
| No resistance exists between terminals 6 (CANH) and 4 (CG) or 14 (CANL) and 4 (CG) of DLC3. | Short to GND in CAN bus main wire Short to GND in CAN bus branch wire Power management control ECU ECM Main body ECU Combination meter Power steering ECU Skid control ECU (Brake booster with master cylinder) Steering angle sensor Yaw rate sensor Center airbag sensor assembly Transmission control ECU Certification ECU (Smart key ECU) Navigation ECU sub-assembly*1*2 Radio and display receiver assembly*2 CAN No. 1 junction connector CAN No. 2 junction connector |
*1: for Navigation receiver type
*2: for Radio and display type
If some ECUs and sensors are not displayed on the "CAN Bus Check" screen of the Techstream and some ECUs and sensors repeatedly appear and disappear from the screen when the CAN main bus wires are normal (there is no open, short, short to B+ or short to GND in the main bus wires), there may be an open circuit in either of the CAN branch wires.
HINT
If some ECUs and sensors repeatedly appear and disappear from the "CAN Bus Check" screen, communication between the normal ECUs (sensors) and the Techstream may be affected by the incomplete signals that are output from the ECU that has an open circuit in either of its CAN branch wires. In this case, the CAN branch wires for the ECUs and sensors that repeatedly appear and disappear from the screen are normal and the ECU that is not displayed on the screen may be the main cause of the problem (this ECU may have an open circuit in either of its CAN branch wires).
| Symptom | Trouble Area |
|---|---|
| 2 or more ECUs and/or sensors do not appear on the Techstream "Communication Bus Check" screen. | One side of CAN branch wire is open, or output signals are incomplete. Power management control ECU ECM Main body ECU Combination meter Power steering ECU Skid control ECU (Brake booster with master cylinder) Steering angle sensor Yaw rate sensor Center airbag sensor assembly Transmission control ECU Certification ECU (Smart key ECU) Navigation ECU sub-assembly*1*2 Radio and display receiver assembly*2 |
*1: for Navigation receiver type
*2: for Radio and display type