DTC B14F4:04 [VEHICLE CONTROL MODULE]

id1502c5050100

Outline

System malfunction location

Parking assist unit (ultrasonic) internal malfunction

Detection condition

•  The vehicle control module (VCM) detects a parking assist unit (ultrasonic) internal malfunction for 11 s.

Note

•  The malfunction may also occur temporarily if the internal processing of the parking assist unit (ultrasonic) becomes slow. If so, the unit returns to normal.

Fail-safe

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

Possible cause

•  Each ultrasonic sensor connector or terminal malfunction

•  Open circuit in each ultrasonic sensor power supply circuit

•  Short to ground in each ultrasonic sensor power supply circuit

•  Open circuit in each ultrasonic sensor signal circuit

•  Short to ground in each ultrasonic sensor signal circuit

•  Open circuit in each ultrasonic sensor ground circuit

•  Malfunction in each ultrasonic sensor

•  Parking assist unit (ultrasonic) malfunction

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

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 EACH ULTRASONIC SENSOR CONNECTOR FOR MALFUNCTION

•  Inspect the applicable connector and terminal.
(See CONNECTOR INSPECTION.)

•  Are the connector and terminal normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification 1.

4

INSPECT EACH ULTRASONIC SENSOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT

•  Inspect the applicable circuit for open circuit.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification 1.

5

INSPECT EACH ULTRASONIC SENSOR POWER SUPPLY CIRCUIT FOR SHORT TO GROUND

•  Inspect the applicable circuit for a short to ground.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification 1.

6

INSPECT EACH ULTRASONIC SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT

•  Inspect the applicable circuit for open circuit.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification 1.

7

INSPECT EACH ULTRASONIC SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND

•  Inspect the applicable circuit for a short to ground.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification 1.

8

INSPECT EACH ULTRASONIC SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT

•  Inspect the applicable circuit for open circuit.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification 1.

9

INSPECT EACH ULTRASONIC SENSOR FOR MALFUNCTION

•  Connect the parking assist unit (ultrasonic) connector.

•  Perform the following procedure for each ultrasonic sensor.

1.  Disconnect the negative battery terminal.
(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

2.  If there is a connected ultrasonic sensor connector, disconnect it.

3.  Connect any one of each ultrasonic sensor connector.

4.  Connect the negative battery terminal.
(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

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

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

7.  Verify if the same DTC is displayed.

•  Is the same DTC displayed for all the sensors?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

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

No

Repair or replace the sensor connected when the DTC is displayed, and perform the repair completion verification 1.

(See FRONT ULTRASONIC SENSOR REMOVAL/INSTALLATION.)

(See REAR ULTRASONIC SENSOR REMOVAL/INSTALLATION.)

10

INSPECT PARKING ASSIST UNIT (ULTRASONIC) FOR MALFUNCTION DEPENDING ON REPEATABILITY

•  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, replace the parking assist unit (ultrasonic) and perform the repair completion verification.

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

No

Perform the [ACTION FOR NON-REPEATABLE MALFUNCTIONS].

(See TROUBLESHOOTING PROCEDURE [(E)].)

If DTC is displayed

•  Repeat the diagnosis from Step 1.

If DTC is not displayed

•  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.)

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.

System malfunction location	Parking assist unit (ultrasonic) internal malfunction
Detection condition	• The vehicle control module (VCM) detects a parking assist unit (ultrasonic) internal malfunction for 11 s. Note • The malfunction may also occur temporarily if the internal processing of the parking assist unit (ultrasonic) becomes slow. If so, the unit returns to normal.
Fail-safe	(See DTC TABLE [VEHICLE CONTROL MODULE (E)].)
Possible cause	• Each ultrasonic sensor connector or terminal malfunction • Open circuit in each ultrasonic sensor power supply circuit • Short to ground in each ultrasonic sensor power supply circuit • Open circuit in each ultrasonic sensor signal circuit • Short to ground in each ultrasonic sensor signal circuit • Open circuit in each ultrasonic sensor ground circuit • Malfunction in each ultrasonic sensor • Parking assist unit (ultrasonic) malfunction • Vehicle control module (VCM) malfunction (built into body control module (BCM))

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 EACH ULTRASONIC SENSOR CONNECTOR FOR MALFUNCTION • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) • Are the connector and terminal normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
4	INSPECT EACH ULTRASONIC SENSOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
5	INSPECT EACH ULTRASONIC SENSOR POWER SUPPLY CIRCUIT FOR SHORT TO GROUND • Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
6	INSPECT EACH ULTRASONIC SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT • Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
6		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
7	INSPECT EACH ULTRASONIC SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND • Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
8	INSPECT EACH ULTRASONIC SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT • Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
8		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
9	INSPECT EACH ULTRASONIC SENSOR FOR MALFUNCTION • Connect the parking assist unit (ultrasonic) connector. • Perform the following procedure for each ultrasonic sensor. 1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) 2. If there is a connected ultrasonic sensor connector, disconnect it. 3. Connect any one of each ultrasonic sensor connector. 4. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].) 5. Clear the DTC recorded in the memory. (See CLEARING DTC.) 6. Perform the DTC inspection for the vehicle control module (VCM). (See DTC INSPECTION.) 7. Verify if the same DTC is displayed. • Is the same DTC displayed for all the sensors?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [VEHICLE CONTROL MODULE (E)].)
9		No	Repair or replace the sensor connected when the DTC is displayed, and perform the repair completion verification 1. (See FRONT ULTRASONIC SENSOR REMOVAL/INSTALLATION.) (See REAR ULTRASONIC SENSOR REMOVAL/INSTALLATION.)
10	INSPECT PARKING ASSIST UNIT (ULTRASONIC) FOR MALFUNCTION DEPENDING ON REPEATABILITY • 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, replace the parking assist unit (ultrasonic) and perform the repair completion verification. (See PARKING ASSIST UNIT (ULTRASONIC) REMOVAL/INSTALLATION.)
10		No	Perform the [ACTION FOR NON-REPEATABLE MALFUNCTIONS]. (See TROUBLESHOOTING PROCEDURE [(E)].) If DTC is displayed • Repeat the diagnosis from Step 1. If DTC is not displayed • 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.)
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.