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DTC B1520:54 [DASH-ELECTRICAL SUPPLY UNIT]

id0702k8005400

Outline

System malfunction location

Seat position initial learning of position memory system not implemented

Detection condition

•  The dash-electrical supply unit detects that the seat position initial learning of the position memory system was not completed.

Fail-safe

•  Inhibits the seat position recall and seat position programming of the position memory system.

Possible cause

•  Seat position initial learning of position memory system not implemented

•  Position memory control module malfunction

•  Dash-electrical supply unit malfunction

System wiring diagram

Not applicable

Connector diagram

Not applicable

System malfunction location	Seat position initial learning of position memory system not implemented
Detection condition	• The dash-electrical supply unit detects that the seat position initial learning of the position memory system was not completed.
Fail-safe	• Inhibits the seat position recall and seat position programming of the position memory system.
Possible cause	• Seat position initial learning of position memory system not implemented • Position memory control module malfunction • Dash-electrical supply unit malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action

1

INSPECT FOR OTHER RELATED DTCs

•  Perform the DTC inspection for the dash-electrical supply unit.
(See DTC INSPECTION.)

•  Are other DTCs related to the position memory system displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [DASH-ELECTRICAL SUPPLY UNIT (E)].)

No

Go to the next step.

2

IMPLEMENT SEAT POSITION INITIAL LEARNING OF POSITION MEMORY SYSTEM

•  Perform the seat position initial learning.
(See SEAT POSITION INITIAL LEARNING.)

•  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

Repair or replace the malfunctioning location and perform the repair completion verification.

(See POSITION MEMORY CONTROL MODULE REMOVAL/INSTALLATION [(E)].)

No

Go to repair completion verification 2.

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	INSPECT FOR OTHER RELATED DTCs • Perform the DTC inspection for the dash-electrical supply unit. (See DTC INSPECTION.) • Are other DTCs related to the position memory system displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [DASH-ELECTRICAL SUPPLY UNIT (E)].)
1		No	Go to the next step.
2	IMPLEMENT SEAT POSITION INITIAL LEARNING OF POSITION MEMORY SYSTEM • Perform the seat position initial learning. (See SEAT POSITION INITIAL LEARNING.) • 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	Repair or replace the malfunctioning location and perform the repair completion verification. (See POSITION MEMORY CONTROL MODULE REMOVAL/INSTALLATION [(E)].)
2		No	Go to repair completion verification 2.
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.