DTC U0001:88/U0100:00/U0101:00/U0104:00/U0121:00/U0131:00/U0140:00/U0151:00/U0155:00/U0182:00/U0214:00/U0235:00/U023A:00 [CONNECTIVITY MASTER UNIT]

id0902n7036400

Description	•  U0001:88 ―  Module communication error (HS-CAN) •  U0100:00 ―  Communication error with PCM •  U0101:00 ―  Communication error with TCM •  U0104:00 ―  Communication error with vehicle control module (V/C-module) •  U0121:00 ―  Communication error with ABS HU/CM or DSC HU/CM •  U0131:00 ―  Communication error with EPS control module •  U0140:00 ―  Communication error with front body control module (FBCM) •  U0151:00 ―  Communication error with SAS control module •  U0155:00 ―  Communication error with instrument cluster •  U0182:00 ―  Communication error with AFS control module or auto leveling control module •  U0214:00 ―  Communication error with start stop unit •  U0235:00 ―  Communication error with laser sensor •  U023A:00 ―  Communication error with forward sensing camera (FSC)
Detection condition	•  U0001:88 ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot detect a CAN bus communication line (HS-CAN) signal for 1 s or more. ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) detects malfunction in the CAN bus communication line (HS-CAN) 10 times continuously. •  U0100:00 ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the PCM for 5 s or more. •  U0101:00 ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the TCM for 5 s or more. •  U0104:00 ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the vehicle control module (V/C-module) for 5 s or more. •  U0121:00 ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the ABS HU/CM or DSC HU/CM for 5 s or more. •  U0131:00 ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the EPS control module for 5 s or more. •  U0140:00 ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the front body control module (FBCM) for 5 s or more. •  U0151:00 ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the SAS control module for 5 s or more. •  U0155:00 ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the instrument cluster for 5 s or more. •  U0182:00 ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the AFS control module for 5 s or more. ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the auto leveling control module for 5 s or more. •  U0214:00 ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the start stop unit for 5 s or more. •  U0235:00 ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the laser sensor for 5 s or more. •  U023A:00 ―  With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the forward sensing camera (FSC) for 5 s or more.
Fail-safe function	•  U0001:88 ―  Not applicable •  U0100:00 ―  Not applicable •  U0101:00 ―  Not applicable •  U0104:00 ―  Not applicable •  U0121:00 ―  Not applicable •  U0131:00 ―  Not applicable •  U0140:00 ―  Not applicable •  U0151:00 ―  Not applicable •  U0155:00 ―  Not applicable •  U0182:00 ―  Not applicable •  U0214:00 ―  Not applicable •  U0235:00 ―  Not applicable •  U023A:00 ―  Not applicable
Possible cause	•  Malfunction in CAN bus communication line •  Malfunction in CAN communication line between the PCM and connectivity master unit (CMU) •  Malfunction in CAN communication line between the TCM and connectivity master unit (CMU) •  Malfunction in CAN communication line between the vehicle control module (V/C-module) and connectivity master unit (CMU) •  Malfunction in CAN communication line between the ABS HU/CM or DSC HU/CM and connectivity master unit (CMU) •  Malfunction in CAN communication line between the EPS control module and connectivity master unit (CMU) •  Malfunction in CAN communication line between the front body control module (FBCM) and connectivity master unit (CMU) •  Malfunction in CAN communication line between the SAS control module and connectivity master unit (CMU) •  Malfunction in CAN communication line between the instrument cluster and connectivity master unit (CMU) •  Malfunction in CAN communication line between the AFS control module and connectivity master unit (CMU) •  Malfunction in CAN communication line between the auto leveling control module and connectivity master unit (CMU) •  Malfunction in CAN communication line between the start stop unit and connectivity master unit (CMU) •  Malfunction in CAN communication line between the laser sensor and connectivity master unit (CMU) •  Malfunction in CAN communication line between the forward sensing camera (FSC) and connectivity master unit (CMU)
System wiring diagram	Not applicable

Diagnostic procedure