DTC B1D03:87 [ADAPTIVE LED HEADLIGHTS CONTROL MODULE (E)]

id1502e4068000

Warning
<<High voltage>>
•  Always observe the following thoroughly to ensure safety when inspecting or removing/installing parts in the motor compartment. Otherwise, the high voltage circuit may operate on the vehicle regardless of whether or not the main power is switched OFF or ON (READY off or on). If this occurs, it could cause electrical shock and result in serious injury or, in the worst case, death.
―  Do not select high voltage battery cooling on center display after EV system stops
―  Do not open/close doors frequently with main power switched OFF
―  Do not perform normal charging or quick charging
―  Switch to connected vehicle maintenance mode (MyMazda App connected vehicle)
―  Cancel climate control timer
―  Operate center display and turn off battery heater operation
Warning
•  The cooling fan may suddenly start operating regardless of the main power switch position. Keep hands and tools away from the cooling fan even if the cooling fan is not operating to prevent injury, or damage to the cooling fan. When servicing the cooling fan or parts near the cooling fan, ensure the following.
―  Do not perform normal charging or quick charging
―  Do not select high voltage battery cooling on center display after EV system stops
―  Do not open/close doors frequently with main power switched OFF
―  Switch to connected vehicle maintenance mode (MyMazda App connected vehicle)
―  Cancel climate control timer
―  Operate center display and turn off battery heater operation

Outline

System malfunction location

Communication error with front combination light (RH)
Detection condition
•  The adaptive LED headlights control module detected communication error with the front combination light (RH) for 5 s.
Fail-safe
•  Perform the following controls with the adaptive LED headlights turned on.
―  Turn off glare-free high beam.
―  Set wide-range low beam as basic light distribution.
•  Control of the headlight auto leveling system is continued.
Possible cause
•  Front combination light (RH) malfunction
•  Adaptive LED headlights control module malfunction
System wiring diagram
Not applicable
Connector diagram
Not applicable


Diagnostic Procedure

Step

Inspection

Action
1
INSPECT FRONT COMBINATION LIGHT (RH) FOR MALFUNCTION DEPENDING ON REPEATABILITY
•  Clear the DTC recorded in the memory.
•  Switch the main power ON (READY off or on) and wait for 5 s or more.
•  Perform the DTC inspection for the adaptive LED headlights control module.
•  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 [L.H.D. (E)].)
(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].)
If the CAN communication is normal, replace the front combination light (RH) and perform the repair completion verification.
(See FRONT COMBINATION LIGHT 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.
•  Switch the main power ON (READY off or on) and wait for 5 s or more.
•  Perform the DTC inspection for the adaptive LED headlights control module.
•  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 [L.H.D. (E)].)
(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].)
If the CAN communication is normal, perform the diagnosis from Step 1.
•  If the malfunction recurs, replace the adaptive LED headlights control module, 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.