Home

Mazdamanuals.com

DTC B14F1:78 [VEHICLE CONTROL MODULE]

id1502c5046400

Outline

System malfunction location

Front side radar sensor optical axis deviation

Detection condition

•  The vehicle control module (VCM) detects that the front side radar sensor (LH) or (RH) determined an axis deviation for 10 s.

Fail-safe

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

Possible cause

•  Front bumper malfunction

―  Damage (including repairs using putty application)

―  Dirt

―  Application of stickers (including transparent types)

―  Freezing

•  Front bumper poor installation

•  Front side radar sensor poor installation

•  Front side radar sensor aiming adjustment malfunction (optical axis deviation)

•  Front side radar sensor (RH) malfunction

•  Front side radar sensor (LH) malfunction

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

System wiring diagram

Not applicable

Connector diagram

Not applicable

System malfunction location	Front side radar sensor optical axis deviation
Detection condition	• The vehicle control module (VCM) detects that the front side radar sensor (LH) or (RH) determined an axis deviation for 10 s.
Fail-safe	(See DTC TABLE [VEHICLE CONTROL MODULE (E)].)
Possible cause	• Front bumper malfunction ― Damage (including repairs using putty application) ― Dirt ― Application of stickers (including transparent types) ― Freezing • Front bumper poor installation • Front side radar sensor poor installation • Front side radar sensor aiming adjustment malfunction (optical axis deviation) • Front side radar sensor (RH) malfunction • Front side radar sensor (LH) malfunction • 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 FRONT SIDE RADAR SENSOR (LH) FOR MALFUNCTION

•  Perform the DTC inspection for the front side radar sensor (LH).
(See DTC INSPECTION.)

•  Is a DTC displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [FRONT SIDE RADAR SENSOR (E)].)

No

Go to the next step.

3

INSPECT FRONT SIDE RADAR SENSOR (RH) FOR MALFUNCTION

•  Perform the DTC inspection for the front side radar sensor (RH).
(See DTC INSPECTION.)

•  Is a DTC displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [FRONT SIDE RADAR SENSOR (E)].)

No

Go to the next step.

4

VERIFY FRONT BUMPER CONDITION

•  Inspect the front side radar sensor installation surface of the front bumper for the following.

―  Damage (including repairs using putty application)

―  Dirt

―  Application of stickers (including transparent types)

―  Freezing

•  Is the front bumper condition normal?

Yes

Go to the next step.

No

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

(See FRONT BUMPER REMOVAL/INSTALLATION [(E)].)

5

VERIFY IF FRONT BUMPER IS INSTALLED POORLY

•  Verify the front bumper installation condition.
(See FRONT BUMPER REMOVAL/INSTALLATION [(E)].)

•  Is the installation condition normal?

Yes

Go to the next step.

No

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

(See FRONT BUMPER REMOVAL/INSTALLATION [(E)].)

6

VERIFY IF FRONT SIDE RADAR SENSOR IS INSTALLED POORLY

•  Verify the front side radar sensor installation condition.
(See FRONT SIDE RADAR SENSOR REMOVAL/INSTALLATION.)

•  Is the installation condition normal?

Yes

Go to the next step.

No

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

(See FRONT SIDE RADAR SENSOR REMOVAL/INSTALLATION.)

7

PERFORM FRONT SIDE RADAR SENSOR RADAR AIMING

•  Perform the front side radar sensor radar aiming.
(See FRONT SIDE/REAR SIDE RADAR SENSOR AIMING.)

•  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 front side radar sensor (RH), then go to the next step.

(See FRONT SIDE RADAR SENSOR REMOVAL/INSTALLATION.)

No

Go to repair completion verification 2.

8

INSPECT FRONT SIDE RADAR SENSOR (LH) 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 front side radar sensor (LH) and perform the repair completion verification.

(See FRONT SIDE RADAR SENSOR REMOVAL/INSTALLATION.)

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 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 FRONT SIDE RADAR SENSOR (LH) FOR MALFUNCTION • Perform the DTC inspection for the front side radar sensor (LH). (See DTC INSPECTION.) • Is a DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [FRONT SIDE RADAR SENSOR (E)].)
2		No	Go to the next step.
3	INSPECT FRONT SIDE RADAR SENSOR (RH) FOR MALFUNCTION • Perform the DTC inspection for the front side radar sensor (RH). (See DTC INSPECTION.) • Is a DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [FRONT SIDE RADAR SENSOR (E)].)
3		No	Go to the next step.
4	VERIFY FRONT BUMPER CONDITION • Inspect the front side radar sensor installation surface of the front bumper for the following. ― Damage (including repairs using putty application) ― Dirt ― Application of stickers (including transparent types) ― Freezing • Is the front bumper condition normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See FRONT BUMPER REMOVAL/INSTALLATION [(E)].)
5	VERIFY IF FRONT BUMPER IS INSTALLED POORLY • Verify the front bumper installation condition. (See FRONT BUMPER REMOVAL/INSTALLATION [(E)].) • Is the installation condition normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See FRONT BUMPER REMOVAL/INSTALLATION [(E)].)
6	VERIFY IF FRONT SIDE RADAR SENSOR IS INSTALLED POORLY • Verify the front side radar sensor installation condition. (See FRONT SIDE RADAR SENSOR REMOVAL/INSTALLATION.) • Is the installation condition normal?	Yes	Go to the next step.
6		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See FRONT SIDE RADAR SENSOR REMOVAL/INSTALLATION.)
7	PERFORM FRONT SIDE RADAR SENSOR RADAR AIMING • Perform the front side radar sensor radar aiming. (See FRONT SIDE/REAR SIDE RADAR SENSOR AIMING.) • 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 front side radar sensor (RH), then go to the next step. (See FRONT SIDE RADAR SENSOR REMOVAL/INSTALLATION.)
7		No	Go to repair completion verification 2.
8	INSPECT FRONT SIDE RADAR SENSOR (LH) 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 front side radar sensor (LH) and perform the repair completion verification. (See FRONT SIDE RADAR SENSOR REMOVAL/INSTALLATION.)
8		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 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.