B1081:4B [DASH_ESU]
id990260104700
Details On DTCs
| System malfunction location |
Abnormal driver-side air mix actuator (L.H.D.)/passenger-side air mix actuator (R.H.D.) temperature |
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Detection condition
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Determination conditions
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• The dash-electrical supply unit detects an abnormally high temperature condition in the driver-side air mix actuator (L.H.D.)/passenger-side air mix actuator (R.H.D.).
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Preconditions
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• Not applicable
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Malfunction determination period
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• Not applicable
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Fail-safe
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• Driver-side air mix actuator (L.H.D.)/Passenger-side air mix actuator (R.H.D.) drive signal is stopped right when the malfunction is determined.
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Vehicle status when DTCs are output
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• Not applicable
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Possible cause
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• Malfunction in wiring harness (including connector/terminal) between driver-side air mix actuator (L.H.D.)/passenger-side air mix actuator (R.H.D.) and dash-electrical supply unit
• Driver-side air mix actuator (L.H.D.)/Passenger-side air mix actuator (R.H.D.) malfunction
• Dash-electrical supply unit malfunction
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System Wiring Diagram
bda2zd00000794
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1
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Dash-electrical supply unit
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2
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Driver-side air mix actuator (L.H.D.)/Passenger-side air mix actuator (R.H.D.)
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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 |
|---|---|---|---|
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1
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PURPOSE: INSPECT WIRING HARNESS (INCLUDING CONNECTOR/TERMINAL) BETWEEN DRIVER-SIDE AIR MIX ACTUATOR (L.H.D.)/PASSENGER-SIDE AIR MIX ACTUATOR (R.H.D.) AND DASH-ELECTRICAL SUPPLY UNIT FOR MALFUNCTION
• Inspect the applicable circuit. (See CIRCUIT INSPECTION.) (See CONNECTOR INSPECTION.)
• Is the circuit normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification 1.
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2
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PURPOSE: VERIFY IF DRIVER-SIDE AIR MIX ACTUATOR (L.H.D.)/PASSENGER-SIDE AIR MIX ACTUATOR (R.H.D.) 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?
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Yes
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Replace the driver-side air mix actuator (L.H.D.)/passenger-side air mix actuator (R.H.D.) and perform the repair completion verification 1.
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No
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Go to repair completion verification 2.
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Repair completion verification 1
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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?
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Yes
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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.)
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No
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Go to the next step.
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Repair completion verification 2
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PURPOSE: VERIFY IF OTHER DTCs ARE DISPLAYED
• Perform the DTC inspection. (See DTC INSPECTION.)
• Are any other DTCs displayed?
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Yes
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Repair or replace the malfunctioning location according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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