DTC B10A4:87 [ADAPTIVE FRONT LIGHTING SYSTEM (AFS)]

id09021n934700

Description

Communication error with swivel actuator (RH)
Detection condition
•  AFS control module detected communication error with the swivel actuator (RH) for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe function
•  The swivel actuator (RH) is stopped at the position when the malfunction is determined.
•  The swivel actuator (LH) is moved to the center, or the swivel actuators (LH) and (RH) are moved to the center.
•  Control of the headlight auto leveling system is continued with the headlight leveling actuator positioned −0.6° from where the malfunction is determined.
Possible cause
•  Front combination light (RH) connector or terminal malfunction
•  AFS control module connector or terminal malfunction
•  Short to ground in wiring harness between the following terminals:
―  AFS control module terminal D—Front combination light (RH) terminal K
―  AFS control module terminal F—Front combination light (RH) terminal J
•  Short to power supply in wiring harness between the following terminals:
―  AFS control module terminal D—Front combination light (RH) terminal K
―  AFS control module terminal F—Front combination light (RH) terminal J
•  Open circuit in wiring harness between the following terminals:
―  AFS control module terminal D—Front combination light (RH) terminal K
―  AFS control module terminal F—Front combination light (RH) terminal J
•  Swivel actuator (RH) malfunction
•  AFS control module malfunction

Diagnostic Procedure

Step

Inspection

Action
1
INSPECT FRONT COMBINATION LIGHT (RH) CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Disconnect the front combination light (RH) connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector, then go to Step 7.
2
INSPECT AFS CONTROL MODULE CONNECTOR CONDITION
•  Disconnect the AFS control module connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector, then go to Step 7.
3
INSPECT FOR SHORT TO GROUND IN SWIVEL ACTUATOR (RH) CIRCUIT
•  Verify that the front combination light (RH) and AFS control module connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
―  Front combination light (RH) terminal K
―  Front combination light (RH) terminal J
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  AFS control module terminal D—Front combination light (RH) terminal K
•  AFS control module terminal F—Front combination light (RH) terminal J
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
Go to Step 7.
No
Go to the next step.
4
INSPECT FOR SHORT TO POWER SUPPLY IN SWIVEL ACTUATOR (RH) CIRCUIT
•  Verify that the front combination light (RH) and AFS control module connectors are disconnected.
•  Disconnect the front combination light (LH) connector.
Note
•  The inspection cannot be performed correctly if the voltage is measured without disconnecting the front combination light (LH) connector because power is supplied to the front combination light (RH) via the front combination light (LH).
•  Reconnect the negative battery cable.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the following terminals (wiring harness-side):
―  Front combination light (RH) terminal K
―  Front combination light (RH) terminal J
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  AFS control module terminal D—Front combination light (RH) terminal K
•  AFS control module terminal F—Front combination light (RH) terminal J
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to power supply.
Go to Step 7.
5
INSPECT FOR OPEN CIRCUIT IN SWIVEL ACTUATOR (RH) CIRCUIT
•  Verify that the front combination light (RH) and AFS control module connectors are disconnected.
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  Inspect for continuity between the following terminals (wiring harness-side):
―  AFS control module terminal D—Front combination light (RH) terminal K
―  AFS control module terminal F—Front combination light (RH) terminal J
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  AFS control module terminal D—Front combination light (RH) terminal K
•  AFS control module terminal F—Front combination light (RH) terminal J
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 7.
6
PERFORM DTC INSPECTION AND VERIFY SWIVEL ACTUATOR (RH) MALFUNCTION
•  Always reconnect all disconnected connectors.
•  Reconnect the disconnected negative battery cable.
•  Clear the DTC for the AFS control module using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Retrieve the AFS control module DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Replace the front combination light (RH), then go to the next step.
(See FRONT COMBINATION LIGHT REMOVAL/INSTALLATION.)
No
Go to Step 8.
7
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Reconnect the disconnected negative battery cable.
•  Clear the DTC for the AFS control module using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Retrieve the AFS control module DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the AFS control module.
Go to the next step.
No
Go to the next step.
8
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [ADAPTIVE FRONT LIGHTING SYSTEM (AFS)].)
No
DTC troubleshooting completed.