Honda Civic manuals

Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc u0073 control module communication bus off

DTC DETECTING CONDITION:

Data to be received via CAN communication do not arrive.

A/C cooperation control does not operate.

TROUBLE SYMPTOM:

A/C does not operate fully automatically.

STEPCHECKYESNO

1.CHECK LAN SYSTEM.

Check LAN system using the Subaru Select Monitor. Basic Diagnostic Procedure

Is there any fault-

Perform the diagnosis according to the inspection for LAN system.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF

2.CHECK A/C CM.

1) Replace with a normally operating A/C CM.

2) Read the DTC using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)

Is U0073 detected-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF

Replace the A/C CM. Control Unit > REMOVAL

3.CHECK CAN COMMUNICATION CIRCUIT.

Check the CAN communication circuit. CAN Communication Circuit Check > LIST

Is the CAN communication circuit normal-

It is possible that temporary poor communication occurs. Clear the memory. Clear Memory Mode

Repair or replace the CAN communication circuit.

Dtc u0028 heater control panel communication error
DTC DETECTING CONDITION:UART communication failureTROUBLE SYMPTOM:• Unable to operate A/C.• DTC “U0028” HEATER CONTROL PANEL COMMUNICATION ERROR was detected.WIRING DIAGRAM:Air ...

Dtc b14b4 seat heater thermistor circuit short-circuit (driver)
DTC DETECTING CONDITION:Short-circuit in seat heater thermistor.TROUBLE SYMPTOM:Seat heater RH does not function.WIRING DIAGRAM:NOTE:For the coupling connector, refer to “WIRING SYSTEM”.Se ...

Other materials:

Electronic parking brake indicator light
Parking brake indicator The light illuminates with the parking brake applied while the ignition switch is in the "ON" position. It turns off when the parking brake is fully released. Electronic parking brake system warning WARNING  When you release the electronic parking b ...

© 2017-2025 Copyright www.sulegacy.com