DTC U0073:00, U0121:00, U0131:00, U0151:00, U0155:00, U0214:00 [MZR 1.6]

id0102h3911800

DTC U0073:00

CAN system communication error (HS CAN)

DETECTION CONDITION

•  Malfunction in CAN bus communication line.

Diagnostic support note

•  This is a continuous monitor (other).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.

•  DTC is 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	• Malfunction in CAN bus communication line. Diagnostic support note • This is a continuous monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA (Mode 2)/Snapshot data is not available. • DTC is 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 U0121:00

CAN communication: communication error to ABS HU/CM or DSC HU/CM

DETECTION CONDITION

•  Communication error between the PCM and DSC HU/CM continues for 5 s or more. (with DSC)

•  Communication error between the PCM and ABS HU/CM continues for 5 s or more. (without DSC)

Diagnostic support note

•  This is a continuous monitor (other).

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

•  FREEZE FRAME DATA (Mode 2)/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Inhibits the DSC control. (with DSC)

•  Inhibits the ABS control. (without DSC)

POSSIBLE CAUSE

With DSC

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

•  DSC HU/CM malfunction

•  PCM malfunction

Without DSC

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

•  ABS HU/CM malfunction

•  PCM malfunction

SYSTEM WIRING DIAGRAM

Not applicable

DTC U0121:00	CAN communication: communication error to ABS HU/CM or DSC HU/CM
DETECTION CONDITION	• Communication error between the PCM and DSC HU/CM continues for 5 s or more. (with DSC) • Communication error between the PCM and ABS HU/CM continues for 5 s or more. (without DSC) Diagnostic support note • This is a continuous monitor (other). • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA (Mode 2)/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Inhibits the DSC control. (with DSC) • Inhibits the ABS control. (without DSC)
POSSIBLE CAUSE	With DSC • CAN communication line malfunction between PCM and DSC HU/CM • DSC HU/CM malfunction • PCM malfunction Without DSC • CAN communication line malfunction between PCM and ABS HU/CM • ABS HU/CM malfunction • PCM malfunction
SYSTEM WIRING DIAGRAM	Not applicable

DTC U0131:00

CAN communication: communication error to EPS control module

DETECTION CONDITION

•  Communication error between the PCM and EPS control module continues for 5 s or more.

Diagnostic support note

•  This is a continuous monitor (other).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.

•  DTC is 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	• Communication error between the PCM and EPS control module continues for 5 s or more. Diagnostic support note • This is a continuous monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA (Mode 2)/Snapshot data is not available. • DTC is 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 U0151:00

CAN communication: communication error to SAS control module

DETECTION CONDITION

•  Communication error between the PCM and SAS control module continues for 5 s or more.

Diagnostic support note

•  This is a continuous monitor (other).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.

•  DTC is 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	• Communication error between the PCM and SAS control module continues for 5 s or more. Diagnostic support note • This is a continuous monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA (Mode 2)/Snapshot data is not available. • DTC is 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

•  Communication error between the PCM and instrument cluster continues for 5 s or more.

Diagnostic support note

•  This is a continuous monitor (other).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

Not applicable

POSSIBLE CAUSE

•  CAN communication line malfunction between PCM 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	• Communication error between the PCM and instrument cluster continues for 5 s or more. Diagnostic support note • This is a continuous monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA (Mode 2)/Snapshot data is not available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	• CAN communication line malfunction between PCM 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

•  Communication error between the PCM and start stop unit continues for 5 s or more.

Diagnostic support note

•  This is a continuous monitor (other).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.

•  DTC is 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	• Communication error between the PCM and start stop unit continues for 5 s or more. Diagnostic support note • This is a continuous monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA (Mode 2)/Snapshot data is not available. • DTC is 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

Diagnostic Procedure

• Inspect according to the diagnostic procedure in ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]. (See FOREWORD [SKYACTIV-D 2.2 (ATX), MZR 1.6].)