DTC U0073:00, U0101:00, U0121:00, U0131:00, U0140:00, U0151:00, U0155:00, U0214:00, U0235:00 [SKYACTIV-D 1.5]

id0102q2910800

DTC U0073:00

CAN system communication error (HS CAN)

DETECTION CONDITION

•  With the following conditions met, a CAN bus communication line error is continued for 1 s or more.

MONITORING CONDITIONS

―  Battery voltage: 10 V or more

―  1.5 s have elapsed after the ignition was switched ON (engine off or on)

Diagnostic support note

•  This is an intermittent monitor (other).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA/Snapshot data is not available.

•  DTC is not stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Not applicable

POSSIBLE CAUSE

•  CAN bus communication line malfunction

•  PCM malfunction

SYSTEM WIRING DIAGRAM

•  Not applicable

DTC U0073:00	CAN system communication error (HS CAN)
DETECTION CONDITION	• With the following conditions met, a CAN bus communication line error is continued for 1 s or more. MONITORING CONDITIONS ― Battery voltage: 10 V or more ― 1.5 s have elapsed after the ignition was switched ON (engine off or on) Diagnostic support note • This is an intermittent monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA/Snapshot data is not available. • DTC is not stored in the PCM memory.
FAIL-SAFE FUNCTION	• Not applicable
POSSIBLE CAUSE	• CAN bus communication line malfunction • PCM malfunction
SYSTEM WIRING DIAGRAM	• Not applicable

DTC U0101:00

CAN communication: communication error to TCM

DETECTION CONDITION

•  With the following conditions met, a communication error between the PCM and TCM is continued for 5 s or more.

MONITORING CONDITIONS

―  Battery voltage: 10 V or more

―  1.5 s have elapsed after the ignition was switched ON (engine off or on)

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Inhibits engine-stop by operating the i-stop function.

POSSIBLE CAUSE

Note

•  During malfunction diagnosis, first verify the malfunction detection of DTC U0074:00 or U0115:00 for the TCM.

•  CAN communication line malfunction between PCM and TCM

•  TCM malfunction

•  PCM malfunction

SYSTEM WIRING DIAGRAM

•  Not applicable

DTC U0101:00	CAN communication: communication error to TCM
DETECTION CONDITION	• With the following conditions met, a communication error between the PCM and TCM is continued for 5 s or more. MONITORING CONDITIONS ― Battery voltage: 10 V or more ― 1.5 s have elapsed after the ignition was switched ON (engine off or on) Diagnostic support note • This is a continuous monitor (CCM). • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Inhibits engine-stop by operating the i-stop function.
POSSIBLE CAUSE	Note • During malfunction diagnosis, first verify the malfunction detection of DTC U0074:00 or U0115:00 for the TCM. • CAN communication line malfunction between PCM and TCM • TCM malfunction • PCM malfunction
SYSTEM WIRING DIAGRAM	• Not applicable

DTC U0121:00

CAN communication: communication error to DSC HU/CM

DETECTION CONDITION

•  With the following conditions met, a communication error between the PCM and DSC HU/CM is continued for 5 s or more.

MONITORING CONDITIONS

―  Battery voltage: 10 V or more

―  1.5 s have elapsed after the ignition was switched ON (engine off or on)

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Not applicable

POSSIBLE CAUSE

•  CAN communication line malfunction between PCM and DSC HU/CM

•  DSC HU/CM malfunction

•  PCM malfunction

SYSTEM WIRING DIAGRAM

•  Not applicable

DTC U0121:00	CAN communication: communication error to DSC HU/CM
DETECTION CONDITION	• With the following conditions met, a communication error between the PCM and DSC HU/CM is continued for 5 s or more. MONITORING CONDITIONS ― Battery voltage: 10 V or more ― 1.5 s have elapsed after the ignition was switched ON (engine off or on) Diagnostic support note • This is a continuous monitor (CCM). • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Not applicable
POSSIBLE CAUSE	• CAN communication line malfunction between PCM and DSC HU/CM • DSC HU/CM malfunction • PCM malfunction
SYSTEM WIRING DIAGRAM	• Not applicable

DTC U0131:00

CAN communication: communication error to EPS control module

DETECTION CONDITION

•  With the following conditions met, a communication error between the PCM and EPS control module is continued for 5 s or more.

MONITORING CONDITIONS

―  Battery voltage: 10 V or more

―  1.5 s have elapsed after the ignition was switched ON (engine off or on)

Diagnostic support note

•  This is an intermittent monitor (other).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA/Snapshot data is not available.

•  DTC is not stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Not applicable

POSSIBLE CAUSE

•  CAN communication line malfunction between PCM and EPS control module

•  EPS control module malfunction

•  PCM malfunction

SYSTEM WIRING DIAGRAM

•  Not applicable

DTC U0131:00	CAN communication: communication error to EPS control module
DETECTION CONDITION	• With the following conditions met, a communication error between the PCM and EPS control module is continued for 5 s or more. MONITORING CONDITIONS ― Battery voltage: 10 V or more ― 1.5 s have elapsed after the ignition was switched ON (engine off or on) Diagnostic support note • This is an intermittent monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA/Snapshot data is not available. • DTC is not stored in the PCM memory.
FAIL-SAFE FUNCTION	• Not applicable
POSSIBLE CAUSE	• CAN communication line malfunction between PCM and EPS control module • EPS control module malfunction • PCM malfunction
SYSTEM WIRING DIAGRAM	• Not applicable

DTC U0140:00

CAN communication: communication error to BCM

DETECTION CONDITION

•  With the following conditions met, a communication error between the PCM and BCM is continued for 5 s or more.

MONITORING CONDITIONS

―  Battery voltage: 10 V or more

―  1.5 s have elapsed after the ignition was switched ON (engine off or on)

Diagnostic support note

•  This is an intermittent monitor (other).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA/Snapshot data is not available.

•  DTC is not stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Not applicable

POSSIBLE CAUSE

•  CAN communication line malfunction between PCM and BCM

•  BCM malfunction

•  PCM malfunction

SYSTEM WIRING DIAGRAM

•  Not applicable

DTC U0140:00	CAN communication: communication error to BCM
DETECTION CONDITION	• With the following conditions met, a communication error between the PCM and BCM is continued for 5 s or more. MONITORING CONDITIONS ― Battery voltage: 10 V or more ― 1.5 s have elapsed after the ignition was switched ON (engine off or on) Diagnostic support note • This is an intermittent monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA/Snapshot data is not available. • DTC is not stored in the PCM memory.
FAIL-SAFE FUNCTION	• Not applicable
POSSIBLE CAUSE	• CAN communication line malfunction between PCM and BCM • BCM malfunction • PCM malfunction
SYSTEM WIRING DIAGRAM	• Not applicable

DTC U0151:00

CAN communication: communication error to SAS control module

DETECTION CONDITION

•  With the following conditions met, a communication error between the PCM and SAS control module is continued for 5 s or more.

MONITORING CONDITIONS

―  Battery voltage: 10 V or more

―  1.5 s have elapsed after the ignition was switched ON (engine off or on)

Diagnostic support note

•  This is an intermittent monitor (other).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA/Snapshot data is not available.

•  DTC is not stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Not applicable

POSSIBLE CAUSE

•  CAN communication line malfunction between PCM and SAS control module

•  SAS control module malfunction

•  PCM malfunction

SYSTEM WIRING DIAGRAM

•  Not applicable

DTC U0151:00	CAN communication: communication error to SAS control module
DETECTION CONDITION	• With the following conditions met, a communication error between the PCM and SAS control module is continued for 5 s or more. MONITORING CONDITIONS ― Battery voltage: 10 V or more ― 1.5 s have elapsed after the ignition was switched ON (engine off or on) Diagnostic support note • This is an intermittent monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA/Snapshot data is not available. • DTC is not stored in the PCM memory.
FAIL-SAFE FUNCTION	• Not applicable
POSSIBLE CAUSE	• CAN communication line malfunction between PCM and SAS control module • SAS control module malfunction • PCM malfunction
SYSTEM WIRING DIAGRAM	• Not applicable

DTC U0155:00

CAN communication: communication error to instrument cluster

DETECTION CONDITION

•  With the following conditions met, a communication error between the PCM and instrument cluster is continued for 5 s or more.

MONITORING CONDITIONS

―  Battery voltage: 10 V or more

―  1.5 s have elapsed after the ignition was switched ON (engine off or on)

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Inhibits engine-stop by operating the i-stop function.

POSSIBLE CAUSE

•  CAN communication line malfunction between PCM and BCM

•  CAN communication line malfunction between BCM and instrument cluster

•  Instrument cluster malfunction

•  PCM malfunction

SYSTEM WIRING DIAGRAM

•  Not applicable

DTC U0155:00	CAN communication: communication error to instrument cluster
DETECTION CONDITION	• With the following conditions met, a communication error between the PCM and instrument cluster is continued for 5 s or more. MONITORING CONDITIONS ― Battery voltage: 10 V or more ― 1.5 s have elapsed after the ignition was switched ON (engine off or on) Diagnostic support note • This is a continuous monitor (CCM). • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Inhibits engine-stop by operating the i-stop function.
POSSIBLE CAUSE	• CAN communication line malfunction between PCM and BCM • CAN communication line malfunction between BCM and instrument cluster • Instrument cluster malfunction • PCM malfunction
SYSTEM WIRING DIAGRAM	• Not applicable

DTC U0214:00

CAN communication: communication error to start stop unit

DETECTION CONDITION

•  With the following conditions met, a communication error between the PCM and start stop unit is continued for 5 s or more.

MONITORING CONDITIONS

―  Battery voltage: 10 V or more

―  1.5 s have elapsed after the ignition was switched ON (engine off or on)

Diagnostic support note

•  This is an intermittent monitor (other).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA/Snapshot data is not available.

•  DTC is not stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Not applicable

POSSIBLE CAUSE

•  CAN communication line malfunction between PCM and start stop unit

•  Start stop unit malfunction

•  PCM malfunction

SYSTEM WIRING DIAGRAM

•  Not applicable

DTC U0214:00	CAN communication: communication error to start stop unit
DETECTION CONDITION	• With the following conditions met, a communication error between the PCM and start stop unit is continued for 5 s or more. MONITORING CONDITIONS ― Battery voltage: 10 V or more ― 1.5 s have elapsed after the ignition was switched ON (engine off or on) Diagnostic support note • This is an intermittent monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA/Snapshot data is not available. • DTC is not stored in the PCM memory.
FAIL-SAFE FUNCTION	• Not applicable
POSSIBLE CAUSE	• CAN communication line malfunction between PCM and start stop unit • Start stop unit malfunction • PCM malfunction
SYSTEM WIRING DIAGRAM	• Not applicable

DTC U0235:00

CAN communication: communication error to laser sensor

DETECTION CONDITION

•  With the following conditions met, a communication error between the PCM and laser sensor is continued for 5 s or more.

MONITORING CONDITIONS

―  Battery voltage: 10 V or more

―  1.5 s have elapsed after the ignition was switched ON (engine off or on)

Diagnostic support note

•  This is an intermittent monitor (other).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA/Snapshot data is not available.

•  DTC is not stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Not applicable

POSSIBLE CAUSE

•  CAN communication line malfunction between PCM and laser sensor

•  Laser sensor malfunction

•  PCM malfunction

SYSTEM WIRING DIAGRAM

•  Not applicable

DTC U0235:00	CAN communication: communication error to laser sensor
DETECTION CONDITION	• With the following conditions met, a communication error between the PCM and laser sensor is continued for 5 s or more. MONITORING CONDITIONS ― Battery voltage: 10 V or more ― 1.5 s have elapsed after the ignition was switched ON (engine off or on) Diagnostic support note • This is an intermittent monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA/Snapshot data is not available. • DTC is not stored in the PCM memory.
FAIL-SAFE FUNCTION	• Not applicable
POSSIBLE CAUSE	• CAN communication line malfunction between PCM and laser sensor • Laser sensor malfunction • PCM malfunction
SYSTEM WIRING DIAGRAM	• Not applicable

Diagnostic Procedure

• Inspect according to the diagnostic procedure in ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]. (See FOREWORD [SKYACTIV-D 1.5].)