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DTC U0415:68 [VEHICLE CONTROL MODULE (E)]

DTC U0415:68 [VEHICLE CONTROL MODULE (E)]

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Without Mazda M Hybrid


Outline

System malfunction location

Error signal received from DSC HU/CM
Detection condition
•  When any of the following conditions is met.
―  The vehicle control module (VCM) receives the following error signals from the DSC HU/CM for 10 s.
•  Vehicle longitudinal acceleration
•  Brake fluid pressure from master cylinder
•  Yaw rate (vehicle turning angle speed)
•  Rotation speed of each wheel
―  The vehicle control module (VCM) detects that the brake signals between DSC HU/CM and the following modules did not match for 10 s during brake pedal operation while the vehicle is being driven.
•  PCM
•  Front radar sensor
•  body control module (BCM)
―  The vehicle control module (VCM) detects that a fail-safe is operated based on a deceleration request for 30 min while the vehicle is being driven.
Fail-safe
(See DTC TABLE [VEHICLE CONTROL MODULE (E)].)
Possible cause
•  CAN BUS No.1 communication line error
•  DSC HU/CM malfunction
―  Brake fluid pressure sensor malfunction (built into DSC HU/CM)
―  ABS wheel-speed sensor error
―  Brake light illumination function malfunction
•  PCM malfunction
―  Brake switch malfunction
•  Electrical supply unit (ESU) malfunction
―  Brake light illumination function malfunction
―  Brake light malfunction
•  Sophisticated Airbag Sensor (SAS) control module malfunction
―  Low-G (XY) sensor error
―  Yaw rate sensor error
•  Front radar sensor malfunction
•  Vehicle control module (VCM) malfunction (built into body control module (BCM))
•  Body control module (BCM) malfunction
―  Brake switch malfunction
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).
•  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 DSC HU/CM FOR MALFUNCTION
•  Perform the DTC inspection for the DSC HU/CM.
•  Is a DTC displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [DSC HU/CM (E)].)
No
Go to the next step.
3
INSPECT PCM FOR MALFUNCTION
•  Perform the DTC inspection for the PCM.
•  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)].)
No
Go to the next step.
4
INSPECT FRONT RADAR SENSOR FOR MALFUNCTION
•  Perform the DTC inspection for the front radar sensor.
•  Is a DTC displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [FRONT RADAR SENSOR (E)].)
No
Go to the next step.
5
INSPECT BODY CONTROL MODULE (BCM) FOR MALFUNCTION
•  Perform the DTC inspection for the body control module (BCM).
•  Is a DTC displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)
No
Go to the next step.
6
INSPECT DSC HU/CM FOR MALFUNCTION DEPENDING ON REPEATABILITY
•  Install/connect the part removed/disconnected during the troubleshooting procedure.
•  Clear the DTC recorded in the memory.
•  Operate the brake pedal while the vehicle is being driven.
•  Perform the DTC inspection for the vehicle control module (VCM).
•  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 DSC HU/CM, then go to the next step.
(See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (E)].)
(See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].)
No
Go to repair completion verification 2.
7
INSPECT PCM FOR MALFUNCTION DEPENDING ON REPEATABILITY
•  Install/connect the part removed/disconnected during the troubleshooting procedure.
•  Clear the DTC recorded in the memory.
•  Operate the brake pedal while the vehicle is being driven.
•  Perform the DTC inspection for the vehicle control module (VCM).
•  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 PCM and perform the repair completion verification.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (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.
•  Operate the brake pedal while the vehicle is being driven.
•  Perform the DTC inspection for the vehicle control module (VCM).
•  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.
No
Go to the next step.
Repair completion verification 2
VERIFY IF OTHER DTC IS DISPLAYED
•  Perform the DTC inspection.
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
No
DTC troubleshooting completed.


With Mazda M Hybrid


Outline

System malfunction location

Error signal received from electronically controlled brake unit
Detection condition
•  When any of the following conditions is met.
―  The vehicle control module (VCM) receives the following error signals from the electronically controlled brake unit for 10 s.
•  Vehicle longitudinal acceleration
•  Brake fluid pressure from master cylinder
•  Yaw rate (vehicle turning angle speed)
•  Rotation speed of each wheel
―  The vehicle control module (VCM) detects that the brake signals between electronically controlled brake unit and the following modules did not match for 10 s during brake pedal operation while the vehicle is being driven.
•  PCM
•  Front radar sensor
•  body control module (BCM)
―  The vehicle control module (VCM) detects that a fail-safe is operated based on a deceleration request for 30 min while the vehicle is being driven.
Fail-safe
(See DTC TABLE [VEHICLE CONTROL MODULE (E)].)
Possible cause
•  CAN BUS No.1 communication line error
•  Electronically controlled brake unit malfunction
―  Brake fluid pressure sensor malfunction (built into electronically controlled brake unit)
―  ABS wheel-speed sensor error
―  Brake light illumination function malfunction
•  PCM malfunction
―  Brake switch malfunction
•  Electrical supply unit (ESU) malfunction
―  Brake light illumination function malfunction
―  Brake light malfunction
•  Sophisticated Airbag Sensor (SAS) control module malfunction
―  Low-G (XY) sensor error
―  Yaw rate sensor error
•  Front radar sensor malfunction
•  Vehicle control module (VCM) malfunction (built into body control module (BCM))
•  Body control module (BCM) malfunction
―  Brake switch malfunction
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).
•  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 ELECTRONICALLY CONTROLLED BRAKE UNIT FOR MALFUNCTION
•  Perform the DTC inspection for the electronically controlled brake unit.
•  Is a DTC displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [ELECTRONICALLY CONTROLLED BRAKE UNIT].)
No
Go to the next step.
3
INSPECT PCM FOR MALFUNCTION
•  Perform the DTC inspection for the PCM.
•  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-X)].)
No
Go to the next step.
4
INSPECT FRONT RADAR SENSOR FOR MALFUNCTION
•  Perform the DTC inspection for the front radar sensor.
•  Is a DTC displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [FRONT RADAR SENSOR (E)].)
No
Go to the next step.
5
INSPECT BODY CONTROL MODULE (BCM) FOR MALFUNCTION
•  Perform the DTC inspection for the body control module (BCM).
•  Is a DTC displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)
No
Go to the next step.
6
INSPECT ELECTRONICALLY CONTROLLED BRAKE UNIT FOR MALFUNCTION DEPENDING ON REPEATABILITY
•  Install/connect the part removed/disconnected during the troubleshooting procedure.
•  Clear the DTC recorded in the memory.
•  Operate the brake pedal while the vehicle is being driven.
•  Perform the DTC inspection for the vehicle control module (VCM).
•  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 electronically controlled brake unit, then go to the next step.
(See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [L.H.D.].)
(See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [R.H.D.].)
No
Go to repair completion verification 2.
7
INSPECT PCM FOR MALFUNCTION DEPENDING ON REPEATABILITY
•  Install/connect the part removed/disconnected during the troubleshooting procedure.
•  Clear the DTC recorded in the memory.
•  Operate the brake pedal while the vehicle is being driven.
•  Perform the DTC inspection for the vehicle control module (VCM).
•  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 PCM and perform the repair completion verification.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)
(See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
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.
•  Operate the brake pedal while the vehicle is being driven.
•  Perform the DTC inspection for the vehicle control module (VCM).
•  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.
No
Go to the next step.
Repair completion verification 2
VERIFY IF OTHER DTC IS DISPLAYED
•  Perform the DTC inspection.
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
No
DTC troubleshooting completed.