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DTC U0300:57 [BODY CONTROL MODULE (BCM)]

id0902r7052600

Outline

System malfunction location

Body control module (BCM) internal malfunction

Detection condition

• The body control module (BCM) detects the internal malfunction.

Fail-safe

Not applicable

Possible cause

• Body control module (BCM) malfunction

System wiring diagram

Not applicable

Connector diagram

Not applicable

System malfunction location	Body control module (BCM) internal malfunction
Detection condition	• The body control module (BCM) detects the internal malfunction.
Fail-safe	Not applicable
Possible cause	• Body control module (BCM) malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action

1

VERIFY BODY CONTROL MODULE (BCM) REPLACEMENT RECORD

•  Verify if the body control module (BCM) has been replaced before performing this troubleshooting procedure.

•  Has the body control module (BCM) been replaced?

Yes

After performing the procedure required for the body control module (BCM) replacement again, perform the repair completion verification according to the [BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION].

(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)

No

Go to the next step.

2

INSPECT BODY CONTROL MODULE (BCM) FOR MALFUNCTION

•  Clear the DTC recorded in the memory.
(See CLEARING DTC.)

•  Perform the DTC inspection for the body control module (BCM).
(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, replace body control module (BCM) and perform the repair completion verification.

(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)

No

Go to the next step.

Repair completion verification

VERIFY IF OTHER DTC IS DISPLAYED

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

•  Are any other DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	VERIFY BODY CONTROL MODULE (BCM) REPLACEMENT RECORD • Verify if the body control module (BCM) has been replaced before performing this troubleshooting procedure. • Has the body control module (BCM) been replaced?	Yes	After performing the procedure required for the body control module (BCM) replacement again, perform the repair completion verification according to the [BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION]. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)
1		No	Go to the next step.
2	INSPECT BODY CONTROL MODULE (BCM) FOR MALFUNCTION • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Perform the DTC inspection for the body control module (BCM). (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, replace body control module (BCM) and perform the repair completion verification. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)
2		No	Go to the next step.
Repair completion verification	VERIFY IF OTHER DTC IS DISPLAYED • Perform the DTC inspection. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification		No	DTC troubleshooting completed.