Dtc B2412 Headlight Swivel Motor Lh Malfunction
Lighting. Lexus Is250, Is220D. Gse20 Ale20
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
PERFORM ACTIVE TEST BY INTELLIGENT TESTER
INSPECT HEADLIGHT ASSEMBLY
CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - AFS ECU)
CHECK AFS ECU
REPLACE HEADLIGHT ASSEMBLY
DTC B2412 Headlight Swivel Motor LH Malfunction |
DTC B2413 Headlight Swivel Motor RH Malfunction |
DESCRIPTION
The swivel actuator receives a signal from the AFS ECU to operate and sends a signal regarding the direction of the headlight and condition of the headlight swivel motor to the AFS ECU.DTC No.
| DTC Detection Condition
| Trouble Area
|
B2412
| - Malfunction in headlight swivel actuator LH
- Open or short in headlight swivel actuator LH circuit
- Open or short in headlight swivel actuator position sensor LH
| - Headlight swivel motor LH (Headlight assembly LH)
- Wire harness or connector
- AFS ECU
|
B2413
| - Malfunction in headlight swivel actuator RH
- Open or short in headlight swivel actuator RH circuit
- Open or short in headlight swivel actuator position sensor RH
| - Headlight swivel motor RH (Headlight assembly RH)
- Wire harness or connector
- AFS ECU
|
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.PERFORM ACTIVE TEST BY INTELLIGENT TESTER |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the intelligent tester main switch on.
Select the "ACTIVE TEST" on the intelligent tester.
Check that the swivel motor operates with the intelligent tester.
ACTIVE TEST: AFS (AFS ECU)Item
| Test Details
| Diagnostic Note
|
Drive Swivel Motor RH
| Drive the swivel motor RIGHT / OFF
| -
|
Drive Swivel Motor LH
| Drive the swivel motor LEFT / OFF
| -
|
- OK:
- Swivel motor operates.
- Result:
Result
| Proceed to
|
OK (When checking from PROBLEM SYMPTOMS TABLE)
| A
|
OK (When checking from DIAGNOSTIC TROUBLE CODE CHART)
| B
|
NG
| C
|
| A |
|
|
|
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
|
| 2.INSPECT HEADLIGHT ASSEMBLY |
Disconnect the B12 and B2 headlight assembly connectors.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
- LH Side (B2412):
Tester Connection
| Condition
| Specified Condition
|
B12-23 (BL1-) - B12-24 (BL1+)
| Always
| 6 to 8 Ω
|
B12-21 (BL2-) - B12-22 (BL2+)
| Always
| 6 to 8 Ω
|
- RH Side (B2413):
Tester Connection
| Condition
| Specified Condition
|
B2-23 (BL1-) - B2-24 (BL1+)
| Always
| 6 to 8 Ω
|
B2-22 (BL2-)- B2-21 (BL2+)
| Always
| 6 to 8 Ω
|
- HINT:
- Measure the resistance after the headlight has cooled.
| | REPLACE HEADLIGHT ASSEMBLY |
|
|
| 3.CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - AFS ECU) |
Disconnect the A28 AFS ECU connector.
Disconnect the B12 and B2 headlight connectors.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
- LH Side (B2412):
Tester Connection
| Condition
| Specified Condition
|
A28-25 (BL1+) - B12-24 (BL1+)
| Always
| Below 1 Ω
|
A28-26 (BL1-) - B12-23 (BL1-)
| Always
| Below 1 Ω
|
A28-27 (BL2+)- B12-22 (BL2+)
| Always
| Below 1 Ω
|
A28-28 (BL2-) - B12-21 (BL2-)
| Always
| Below 1 Ω
|
A28-19 (SMGL) - B12-19 (SMGL)
| Always
| Below 1 Ω
|
A28-24 (SML) - B12-18 (SML)
| Always
| Below 1 Ω
|
A28-22 (SMBL) - B12-20 (SMBL)
| Always
| Below 1 Ω
|
A28-29 (LL1+) - B12-15 (LL1+)
| Always
| Below 1 Ω
|
A28-30 (LL1-) - B12-14 (LL1-)
| Always
| Below 1 Ω
|
A28-31 (LL2+) - B12-13 (LL2+)
| Always
| Below 1 Ω
|
A28-32 (LL2-) - B12-12 (LL2-)
| Always
| Below 1 Ω
|
A28-25 (BL1+) - Body ground
| Always
| 10 kΩ or higher
|
A28-26 (BL1-) - Body ground
| Always
| 10 kΩ or higher
|
A28-27 (BL2+) - Body ground
| Always
| 10 kΩ or higher
|
A28-28 (BL2-) - Body ground
| Always
| 10 kΩ or higher
|
A28-19 (SMGL) - Body ground
| Always
| 10 kΩ or higher
|
A28-24 (SML) - Body ground
| Always
| 10 kΩ or higher
|
A28-22 (SMBL) - Body ground
| Always
| 10 kΩ or higher
|
A28-29 (LL1+) - Body ground
| Always
| 10 kΩ or higher
|
A28-30 (LL1-) - Body ground
| Always
| 10 kΩ or higher
|
A28-31 (LL2+) - Body ground
| Always
| 10 kΩ or higher
|
A28-32 (LL2-) - Body ground
| Always
| 10 kΩ or higher
|
- RH Side (B2413):
Tester Connection
| Condition
| Specified Condition
|
A28-9 (BR1+) - B2-24 (BR1+)
| Always
| Below 1 Ω
|
A28-10 (BR1-) - B2-23 (BR1-)
| Always
| Below 1 Ω
|
A28-11 (BR2+) - B2-22 (BR2+)
| Always
| Below 1 Ω
|
A28-12 (BR2-) - B2-21 (BR2+)
| Always
| Below 1 Ω
|
A28-18 (SMGR) - B2-19 (SMGR)
| Always
| Below 1 Ω
|
A28-21 (SMBR) - B2-20 (SMR)
| Always
| Below 1 Ω
|
A28-23 (SMR) - B2-18 (SMBR)
| Always
| Below 1 Ω
|
A28-13 (LR1+) - B2-15 (LR1+)
| Always
| Below 1 Ω
|
A28-14 (LR1-) - B2-14 (LR1-)
| Always
| Below 1 Ω
|
A28-15 (LR2+) - B2-13 (LR2+)
| Always
| Below 1 Ω
|
A28-16 (LR2-) - B2-12 (LR2-)
| Always
| Below 1 Ω
|
A28-9 (BR1+) - Body ground
| Always
| 10 kΩ or higher
|
A28-10 (BR1-) - Body ground
| Always
| 10 kΩ or higher
|
A28-11 (BR2+) - Body ground
| Always
| 10 kΩ or higher
|
A28-12 (BR2-) - Body ground
| Always
| 10 kΩ or higher
|
A28-18 (SMGR) - Body ground
| Always
| 10 kΩ or higher
|
A28-21 (SMBR) - Body ground
| Always
| 10 kΩ or higher
|
A28-23 (SMR) - Body ground
| Always
| 10 kΩ or higher
|
A28-13 (LR1+) - Body ground
| Always
| 10 kΩ or higher
|
A28-14 (LR1-)- Body ground
| Always
| 10 kΩ or higher
|
A28-15 (LR2+) - Body ground
| Always
| 10 kΩ or higher
|
A28-16 (LR2-) - Body ground
| Always
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
Disconnect the B12 and B2 headlight connectors.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
- LH Side (B2412):
Tester Connection
| Condition
| Specified Condition
|
B12-20 (SMBL) - B12-19 (SMGL)
| Engine switch off
| Below 1 V
|
Engine switch on (IG)
| 4.5 to 5.5 V
|
- RH Side (B2413):
Tester Connection
| Condition
| Specified Condition
|
B2-20 (SMBR) - B2-19 (SMGR)
| Engine switch off
| Below 1 V
|
Engine switch on (IG)
| 4.5 to 5.5 V
|
| 5.REPLACE HEADLIGHT ASSEMBLY |
Temporarily replace the headlight assembly with a new or normally functioning one.
Check that the headlight assembly operates.
- OK:
- Returns to normal operation.
