DTC U0129-00: Can Communication System: Communication Error To Electronically Controlled Brake Unit/DSC HU/Cm (PYUL)
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U0129: 00 (PCM (PYUL)) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
CAN communication system: Communication error to electronically controlled brake unit/DSC HU/CM |
| Detection condition |
- Communication error between the PCM and electronically controlled brake unit/DSC HU/CM continues for a specified period of time.
|
| Fail-safe |
- Inhibits the DSC control.
- Inhibits engine-stop by i-stop control.
|
| Possible cause |
- Malfunction in CAN communication line between electronically controlled brake unit/DSC HU/CM and PCM
- Electronically controlled brake unit/DSC HU/CM malfunction (Refer to [ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION
]
). (Refer to [
DSC HU/CM REMOVAL/INSTALLATION] in the appropriate service information).
- PCM malfunction (Refer to [PCM REMOVAL/INSTALLATION
]
).
|
| Repeatability verification procedure |
- Clear the DTC recorded in the memory. (See CLEARING DTC
.)
- Perform the KOEO or KOER self test. (See DTC INSPECTION
.)
|
| System Wiring Diagram |
|