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DTC B14F4:4B [VEHICLE CONTROL MODULE]

id1502c5050400

Outline

System malfunction location

Ambient temperature abnormality (high temperature)

Detection condition

•  The vehicle control module (VCM) detects that the parking assist unit (ultrasonic) determined that the ambient temperature output from the PCM is higher than 85 °C {185 °F} for 15 s.

Fail-safe

(See DTC TABLE [VEHICLE CONTROL MODULE (E)].)

Possible cause

•  PCM malfunction

•  Parking assist unit (ultrasonic) malfunction

•  Ambient temperature is high.

•  Vehicle control module (VCM) malfunction (built into body control module (BCM))

System wiring diagram

Not applicable

Connector diagram

Not applicable

System malfunction location	Ambient temperature abnormality (high temperature)
Detection condition	• The vehicle control module (VCM) detects that the parking assist unit (ultrasonic) determined that the ambient temperature output from the PCM is higher than 85 °C {185 °F} for 15 s.
Fail-safe	(See DTC TABLE [VEHICLE CONTROL MODULE (E)].)
Possible cause	• PCM malfunction • Parking assist unit (ultrasonic) malfunction • Ambient temperature is high. • Vehicle control module (VCM) malfunction (built into body control module (BCM))
System wiring diagram	Not applicable
Connector diagram	Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action

1

INSPECT VEHICLE CONTROL MODULE (VCM) AND BODY CONTROL MODULE (BCM) FOR MALFUNCTION

•  Perform the DTC inspection for the vehicle control module (VCM) and the body control module (BCM).
(See DTC INSPECTION.)

•  Is a DTC related to an internal malfunction displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [VEHICLE CONTROL MODULE (E)].)

(See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)

No

Go to the next step.

2

INSPECT PARKING ASSIST UNIT (ULTRASONIC) FOR MALFUNCTION

•  Perform the DTC inspection for the parking assist unit (ultrasonic).
(See DTC INSPECTION.)

•  Is a DTC displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [PARKING ASSIST UNIT (ULTRASONIC) (E)].)

No

Go to the next step.

3

INSPECT PCM FOR MALFUNCTION

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

•  Is a DTC displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [PCM (SKYACTIV-G (E))].)

(See DTC TABLE [PCM (SKYACTIV-D)].)

(See DTC TABLE [PCM (SKYACTIV-X)].)

No

Go to the next step.

4

VERIFY IF PARKING ASSIST UNIT (ULTRASONIC) FUNCTION IS STOPPED DUE TO INCREASE IN AMBIENT TEMPERATURE

•  Start the engine and move the vehicle to a cool place.

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

•  Perform the DTC inspection for the vehicle control module (VCM).
(See DTC INSPECTION.)

•  Is the same Pending DTC present?

Yes

Replace the parking assist unit (ultrasonic) and perform the repair completion verification.

(See PARKING ASSIST UNIT (ULTRASONIC) REMOVAL/INSTALLATION.)

No

Explain to the customer that the parking assist unit (ultrasonic) function stopped due to an increase in the ambient temperature, and then 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 vehicle control module (VCM).
(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 body control module (BCM), then go to the next step.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)

No

Go to the next step.

Repair completion verification 2

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	INSPECT VEHICLE CONTROL MODULE (VCM) AND BODY CONTROL MODULE (BCM) FOR MALFUNCTION • Perform the DTC inspection for the vehicle control module (VCM) and the body control module (BCM). (See DTC INSPECTION.) • Is a DTC related to an internal malfunction displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [VEHICLE CONTROL MODULE (E)].) (See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)
1		No	Go to the next step.
2	INSPECT PARKING ASSIST UNIT (ULTRASONIC) FOR MALFUNCTION • Perform the DTC inspection for the parking assist unit (ultrasonic). (See DTC INSPECTION.) • Is a DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PARKING ASSIST UNIT (ULTRASONIC) (E)].)
2		No	Go to the next step.
3	INSPECT PCM FOR MALFUNCTION • Perform the DTC inspection for the PCM. (See DTC INSPECTION.) • Is a DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G (E))].) (See DTC TABLE [PCM (SKYACTIV-D)].) (See DTC TABLE [PCM (SKYACTIV-X)].)
3		No	Go to the next step.
4	VERIFY IF PARKING ASSIST UNIT (ULTRASONIC) FUNCTION IS STOPPED DUE TO INCREASE IN AMBIENT TEMPERATURE • Start the engine and move the vehicle to a cool place. • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Perform the DTC inspection for the vehicle control module (VCM). (See DTC INSPECTION.) • Is the same Pending DTC present?	Yes	Replace the parking assist unit (ultrasonic) and perform the repair completion verification. (See PARKING ASSIST UNIT (ULTRASONIC) REMOVAL/INSTALLATION.)
4		No	Explain to the customer that the parking assist unit (ultrasonic) function stopped due to an increase in the ambient temperature, and then 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 vehicle control module (VCM). (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 body control module (BCM), then go to the next step. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	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 2		No	DTC troubleshooting completed.