DTC U0146:00 [CONNECTIVITY MASTER UNIT (TYPE-B)]

id1602a9030300

Outline

System malfunction location

Communication error with gateway unit (GWU)

Detection condition

•  The connectivity master unit (CMU) detects a communication interruption or communication error with the gateway unit (GWU) for approx. 6 s.

Fail-safe

•  The connectivity master unit (CMU) is put in sleep mode and it does not launch.

Possible cause

•  Malfunction in CAN bus communication line

•  Gateway unit (GWU) malfunction

•  Connectivity master unit (CMU) malfunction

System wiring diagram

Not applicable

Connector diagram

Not applicable

System malfunction location	Communication error with gateway unit (GWU)
Detection condition	• The connectivity master unit (CMU) detects a communication interruption or communication error with the gateway unit (GWU) for approx. 6 s.
Fail-safe	• The connectivity master unit (CMU) is put in sleep mode and it does not launch.
Possible cause	• Malfunction in CAN bus communication line • Gateway unit (GWU) malfunction • Connectivity master unit (CMU) malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable

Diagnostic Procedure

• Perform an inspection in accordance with the multiplex communication system diagnostic procedure. (Refer to the [CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW] in the workshop manual)