DTC Lookup

B1086 DTC

Communication error with airflow mode actuator

Component Connector
Component Connector
Component Connector
Component Connector
Component Connector
Component Connector
Component Connector
Component Connector
Component Connector
Component Connector

Possible Causes

  • Malfunction in wiring harness (including connector/terminal) between airflow mode actuator and dash-electrical supply unit
  • Airflow mode actuator malfunction
  • A/C unit malfunction (airflow mode main link malfunction or airflow mode door malfunction)
  • Dash-electrical supply unit malfunction Syst

Dash_ESU

B1086:4B [DASH_ESU]

SM3340226

id990260105700

Details On DTCs

System malfunction location

Abnormal airflow mode actuator temperature
Detection condition
Determination conditions
• The dash-electrical supply unit detects an abnormally high temperature condition in the airflow mode actuator.
Preconditions
• Not applicable
Malfunction determination period
• Not applicable
Fail-safe
• Airflow mode actuator drive signal is stopped right when the malfunction is determined.
Vehicle status when DTCs are output
• Not applicable
Possible cause
• Malfunction in wiring harness (including connector/terminal) between airflow mode actuator and dash-electrical supply unit
• Airflow mode actuator malfunction
• Dash-electrical supply unit malfunction

System Wiring Diagram

image
bda2zd00000794
1
Dash-electrical supply unit
2
Airflow mode actuator

Function Explanation (DTC Detection Outline)

• Not applicable

Repeatability Verification Procedure

• Not applicable

Function Inspection Using M-MDS

• Not applicable

Troubleshooting Diagnostic Procedure

Step

Inspection

Results

Action
1
PURPOSE: INSPECT WIRING HARNESS (INCLUDING CONNECTOR/TERMINAL) BETWEEN AIRFLOW MODE ACTUATOR AND DASH-ELECTRICAL SUPPLY UNIT FOR MALFUNCTION
• Inspect the applicable circuit. (See CIRCUIT INSPECTION.) (See CONNECTOR INSPECTION.)
• Is the circuit normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification 1.
2
PURPOSE: VERIFY IF AIRFLOW MODE ACTUATOR TEMPERATURE WAS TEMPORARILY HIGH
• Start the engine/PHEV/EV system and move the vehicle to a cool place.
• Switch the ignition off/main power OFF and wait for 30 min or more.
• Clear the DTC recorded in the memory. (See CLEARING DTC.)
• Perform the DTC inspection for the dash-electrical supply unit. (See DTC INSPECTION.)
• Is the same Pending DTC present?
Yes
Replace the airflow mode actuator and perform the repair completion verification 1.
No
Go to repair completion verification 2.
Repair completion verification 1
PURPOSE: VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Clear the DTC recorded in the memory. (See CLEARING DTC.)
• Perform the DTC inspection for the dash-electrical supply unit. (See DTC INSPECTION.)
• Is the same Pending DTC present?
Yes
Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
• If the malfunction recurs, replace the dash-electrical supply unit, then go to the next step. (Refer to [DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION] in workshop manual.)
No
Go to the next step.
Repair completion verification 2
PURPOSE: VERIFY IF OTHER DTCs ARE DISPLAYED
• Perform the DTC inspection. (See DTC INSPECTION.)
• Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning location according to the applicable DTC troubleshooting.
No
DTC troubleshooting completed.