B2503

B2503, B2504 SWIVEL ACTUATOR





Description

SWIVEL ACTUATOR
The swivel actuator is installed in the headlamp unit. The swivel actuator consists of the swivel motor and the swivel position sensor.

SWIVEL MOTOR
- The swivel motor is the two-phase step motor.
- The swivel motor drives headlamp by exciting the two drive coils according to the drive signal from AFS control unit.
- The rotation direction of the swivel motor is changeable by changing the exciting pattern.

SWIVEL POSITION SENSOR
The swivel position sensor detects the headlamp swivel angle to transmit the swivel position sensor signal to
AFS control unit.




DTC Logic

DTC DETECTION LOGIC
- [B2503] Swivel actuator [RH]
- [B2504] Swivel actuator [LH]






DTC CONFIRMATION PROCEDURE
1.DTC ERASE
Erase the DTC memory of AFS with CONSULT-III.
- GO TO 2.
2.CONFIRMATION DTC SELECTION
Select "B2503" or "B2504" for confirmation.
Which DTC is confirmation?
B2503 - GO TO 3.
B2504 - GO TO 4.
3.DTC CONFIRMATION (B2503)
1. Steer to the straight-forward position.
2. Start the engine.
3. Turn AFS OFF switch OFF.
4. Turn the headlamp ON.
5. Shift the selector lever to "N" (A/T models).
6. Shift the shift knob to neutral (M/T models).
7. Steer to the right. (Rotate it once or more.)
8. Perform the self-diagnosis with CONSULT-III.
Is DTC "B2503" detected?
YES - Refer to B2503.
NO - Refer to Intermittent Incident.
4.DTC CONFIRMATION (B2504)
1. Steer to the straight-forward position.
2. Start the engine.
3. Turn AFS OFF switch OFF.
4. Turn the headlamp ON.
5. Drive at 25 km/h (15.5 MPH) or more.
6. Steer to the left. (Rotate it once or more.)
7. Stop the vehicle.
8. Perform the self-diagnosis with CONSULT-III.
Is DTC "B2504" detected?
YES - Refer to B2503.
NO - Refer to Intermittent Incident.




Diagnosis Procedure
1.CHECK SWIVEL POSITION SENSOR SIGNAL INPUT
1. Turn the ignition switch ON.
2. Check the voltage between the AFS control unit harness connector and the ground.





Is the measurement value within the standard value?
YES - GO TO 2.
Less than the standard value -GO TO 6.
Higher than the standard value-GO TO 9.
2.CHECK SWIVEL MOTOR
Check the swivel motor. Refer to B2503.
Is the inspection result normal?
YES - GO TO 3.
NO - Replace the front combination lamp.
3.CHECK SWIVEL MOTOR OPEN CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect AFS control unit connector and the headlamp swivel actuator connector.
3. Check continuity between the AFS control unit harness connector and the headlamp swivel actuator harness connector.





Does continuity exist?
YES - GO TO 4.
NO - Repair the harnesses or connectors.
4.CHECK SWIVEL MOTOR SHORT CIRCUIT
Check continuity between the AFS control unit harness connector and the ground.





Does continuity exist?
YES - Repair the harnesses or connectors.
NO - GO TO 5.
5.CHECK SWIVEL MOTOR CIRCUIT VOLTAGE OUTPUT
1. Connect AFS control unit connector.
2. Turn the ignition switch ON.
3. Check the voltage between the AFS control unit harness connector and the ground.





Is the measurement value within the standard value?
YES - Replace the front combination lamp.
NO - Replace AFS control unit.
6.CHECK SWIVEL POSITION SENSOR SIGNAL OUTPUT
Check the voltage between the AFS control unit harness connector and the ground.





Is the measurement value normal?
YES - GO TO 7.
NO - GO TO 9.
7.CHECK SWIVEL POSITION SENSOR POWER SUPPLY CIRCUIT INPUT VOLTAGE
1. Turn the ignition switch OFF.
2. Disconnect the headlamp swivel actuator connector.
3. Turn the ignition switch ON.
4. Check the voltage between the headlamp swivel actuator harness connector and the ground.





Is the measurement value normal?
YES - GO TO 8.
NO - Repair the harnesses or connectors.
8.CHECK SWIVEL POSITION SENSOR SIGNAL OPEN CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect AFS control unit connector.
3. Check continuity between the AFS control unit harness connector and the headlamp swivel actuator harness connector.





Does continuity exist?
YES - Replace the front combination lamp.
NO - Repair the harnesses or connectors.
9.CHECK SWIVEL POSITION SENSOR GROUND CIRCUIT VOLTAGE OUTPUT
Check the voltage between the AFS control unit harness connector and the ground.





Is the measurement value normal?
YES - GO TO 10.
NO - Replace AFS control unit.
10.CHECK SWIVEL POSITION SENSOR OPEN GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect AFS control unit connector and the headlamp swivel actuator connector.
3. Check continuity between the AFS control unit harness connector and the headlamp swivel actuator harness connector.





Does continuity exist?
YES - Replace the front combination lamp.
NO - Repair the harnesses or connectors.




Component Inspection
1.CHECK SWIVEL MOTOR SINGLE PART
1. Disconnect the swivel actuator connector.
2. Check the resistance among each swivel actuator connector terminal.





Is the measurement value normal?
YES - Swivel actuator is normal.
NO - Replace the front combination lamp.