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DTC B2009:23 [DASH-ELECTRICAL SUPPLY UNIT]

id0702k8008100

Outline

System malfunction location

Climate control unit operation panel malfunction

Detection condition

•  The dash-electrical supply unit detects that any one of the switches located on the climate control unit operation panel is stuck on.

Fail-safe

•  Not applicable

Possible cause

•  Climate control unit malfunction

•  Dash-electrical supply unit malfunction

System wiring diagram

Not applicable

Connector diagram

Not applicable

System malfunction location	Climate control unit operation panel malfunction
Detection condition	• The dash-electrical supply unit detects that any one of the switches located on the climate control unit operation panel is stuck on.
Fail-safe	• Not applicable
Possible cause	• Climate control unit malfunction • Dash-electrical supply unit malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action

1

VERIFY THAT CLIMATE CONTROL UNIT OPERATION PANEL IS STUCK ON

•  Select the following PIDs according to the vehicle specification.
(See PID/DATA MONITOR INSPECTION.)

(See PID/DATA MONITOR TABLE [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER) (E)].)

(See PID/DATA MONITOR TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER) (E)].)

―  Climate control unit (manual air conditioner)

•  A/C_MODE_BILVL_SW

•  A/C_MODE_FLOOR_DEF_SW

•  A/C_MODE_FLOOR_SW

•  A/C_MODE_PNL_SW

•  A/C_SW (With refrigerant system)

•  DEF_SW

•  R_DEF_SW

•  REC_SW

•  SEAT_HEAT_SW_L (With seat warmer system)

•  SEAT_HEAT_SW_R (With seat warmer system)

•  STR_HEAT_SW (With heated steering wheel system)

―  Climate control unit (full-auto air conditioner)

•  A/C_SW

•  AUTO_SW

•  DEF_SW

•  FAN_DOWN_SW

•  FAN_UP_SW

•  MODE_SW

•  ON_OFF_SW

•  R_DEF_SW

•  REC_SW

•  SEAT_HEAT_SW_L (With seat warmer system)

•  SEAT_HEAT_SW_R (With seat warmer system)

•  STR_HEAT_SW (With heated steering wheel system)

•  SYNC_SW

•  Operate the switches located on the climate control unit operation panel and verify if the corresponding PID item display changes according to the operation.

•  Is the operation for all the switches in conjunction with the PID item display?

Yes

Go to the next step.

No

Replace the climate control unit and perform the repair completion verification.

(See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (E)].)

(See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].)

Repair completion verification 1

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.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

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.
(See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (E)].)

(See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].)

No

Go to the next step.

Repair completion verification 2

VERIFY IF OTHER DTCs DISPLAYED

•  Perform the DTC inspection.
(See DTC INSPECTION.)

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	VERIFY THAT CLIMATE CONTROL UNIT OPERATION PANEL IS STUCK ON • Select the following PIDs according to the vehicle specification. (See PID/DATA MONITOR INSPECTION.) (See PID/DATA MONITOR TABLE [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER) (E)].) (See PID/DATA MONITOR TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER) (E)].) ― Climate control unit (manual air conditioner) • A/C_MODE_BILVL_SW • A/C_MODE_FLOOR_DEF_SW • A/C_MODE_FLOOR_SW • A/C_MODE_PNL_SW • A/C_SW (With refrigerant system) • DEF_SW • R_DEF_SW • REC_SW • SEAT_HEAT_SW_L (With seat warmer system) • SEAT_HEAT_SW_R (With seat warmer system) • STR_HEAT_SW (With heated steering wheel system) ― Climate control unit (full-auto air conditioner) • A/C_SW • AUTO_SW • DEF_SW • FAN_DOWN_SW • FAN_UP_SW • MODE_SW • ON_OFF_SW • R_DEF_SW • REC_SW • SEAT_HEAT_SW_L (With seat warmer system) • SEAT_HEAT_SW_R (With seat warmer system) • STR_HEAT_SW (With heated steering wheel system) • SYNC_SW • Operate the switches located on the climate control unit operation panel and verify if the corresponding PID item display changes according to the operation. • Is the operation for all the switches in conjunction with the PID item display?	Yes	Go to the next step.
1		No	Replace the climate control unit and perform the repair completion verification. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (E)].) (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].)
Repair completion verification 1	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. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) 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. (See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (E)].) (See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs DISPLAYED • Perform the DTC inspection. (See DTC INSPECTION.) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification 2		No	DTC troubleshooting completed.