DTC U0001:88/U0100:00/U0101:00/U0121:00/U0121:87/U0131:00/U0140:00/U0146:00/U0151:00/U0155:00 [START STOP UNIT]

id0902p6023800

System malfunction location	U0001:88 •  Module communication error (HS-CAN) U0100:00 •  Communication error with PCM U0101:00 •  Communication error with TCM U0121:00 •  Communication error with DSC HU/CM U0121:87 •  Communication error with DSC HU/CM U0131:00 •  Communication error with EPS control module U0140:00 •  Communication error with front body control module (FBCM) U0146:00 •  Communication error with instrument cluster U0151:00 •  SAS control module communication error U0155:00 •  Communication error with instrument cluster
Detection condition	•  U0001:88 ―  The start stop unit detects CAN bus communication line (HS-CAN) malfunction 10 times continuously. •  U0100:00 ―  The start stop unit could not receive CAN signal from the PCM for 1 s or more. •  U0101:00 ―  The start stop unit could not receive CAN signal from the TCM for 1 s or more. •  U0121:00 ―  The start stop unit could not receive CAN signal from the DSC HU/CM for 1 s or more. •  U0121:87 ―  The start stop unit could not receive CAN signal from the DSC HU/CM for 10 s or more. •  U0131:00 ―  The start stop unit could not receive CAN signal from the EPS control module for 1.2 s or more. •  U0140:00 ―  The start stop unit could not receive CAN signal from the front body control module (FBCM) for 5 s or more. •  U0146:00 ―  The start stop unit cannot receive CAN signals from the instrument cluster for 5 s or more with the ignition switched ON (engine off or on). •  U0151:00 ―  The start stop unit could not receive CAN signal from the SAS control module for 1 s or more. •  U0155:00 ―  The start stop unit could not receive CAN signal from the instrument cluster for 5 s or more.
Fail-safe	•  U0001:88 ―  Sets to default signal. ―  Cancel the i-stop control. (With i-stop) •  U0100:00 ―  Sets to default signal. ―  Cancel the i-stop control. (With i-stop) •  U0101:00 ―  Sets to default signal. •  U0121:00 ―  Sets to default signal. •  U0121:87 ―  Sets to default signal. •  U0131:00 ―  Sets to default signal. •  U0140:00 ―  Sets to default signal. •  U0146:00 ―  Sets to default signal. •  U0151:00 ―  Sets to default signal. •  U0155:00 ―  Sets to default signal.
Possible cause	•  Malfunction in CAN bus communication line •  Malfunction in CAN line between the PCM and start stop unit •  Malfunction in CAN line between the TCM and start stop unit •  Malfunction in CAN line between the DSC HU/CM and start stop unit •  Malfunction in CAN line between the EPS control module and start stop unit •  Malfunction in CAN line between the front body control module (FBCM) and start stop unit •  Malfunction in CAN line between the SAS control module and start stop unit •  Malfunction in CAN line between the instrument cluster and start stop unit
System wiring diagram	—

Diagnostic Procedure