DTC U0001:88/U0100:00/U0121:00/U0155:00/U0214:00 [REAR VEHICLE MONITORING SYSTEM]

Description	• U0001:88 ― Unit communication error (MS-CAN) • U0100:00 ― Communication error with PCM • U0121:00 ― Communication error with DSC HU/CM • U0155:00 ― Communication error with instrument cluster • U0214:00 ― Communication error with start stop unit
Detection condition	• U0001:88 ― Rear vehicle monitoring control module (LH) detects a CAN bus communication line (MS-CAN) malfunction. • U0100:00 ― Rear vehicle monitoring control module (LH) cannot receive the CAN signal from the PCM for 2 s or more. • U0121:00 ― Rear vehicle monitoring control module (LH) cannot receive the CAN signal from the DSC HU/CM for 2 s or more. • U0155:00 ― Rear vehicle monitoring control module (LH) cannot receive the CAN signal from the instrument cluster for 2 s or more. • U0214:00 ― Rear vehicle monitoring control module (LH) cannot receive the CAN signal from the start stop unit for 2 s or more.
Fail-safe function	• U0001:88 ― Inhibits the rear vehicle monitoring system. • U0100:00 ― Inhibits the rear vehicle monitoring system. • U0121:00 ― Inhibits the rear vehicle monitoring system. • U0155:00 ― Inhibits the rear vehicle monitoring system. • U0214:00 ― Inhibits the rear vehicle monitoring system.
Possible cause	• Malfunction in CAN bus communication line • Malfunction in CAN communication line between PCM and rear vehicle monitoring control module (LH) ― Instrument cluster communication error (vehicle speed signal is not sent via instrument cluster from PCM) • Malfunction in CAN communication line between DSC HU/CM and rear vehicle monitoring control module (LH) ― Instrument cluster communication error (yaw rate signal is not sent via instrument cluster from DSC HU/CM) • Malfunction in CAN communication line between instrument cluster and rear vehicle monitoring control module (LH) • Malfunction in CAN communication line between start stop unit and rear vehicle monitoring control module (LH) ― Instrument cluster communication error (turn switch signal is not sent via instrument cluster from start stop unit)
System wiring diagram	Not applicable

• Perform the malfunction diagnosis according to the troubleshooting procedure for the multiplex communication system. (See FOREWORD [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5, SKYACTIV-D 2.2 (MTX)].) (See FOREWORD [SKYACTIV-D 2.2 (ATX), MZR 1.6].) (See FOREWORD [SKYACTIV-D 1.5].)