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

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

Diagnostic Procedure