Lexus IS250 IS220d GSE20 ALE20 - LIGHTING
PERFORM ACTIVE TEST BY INTELLIGENT TESTER
CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - AFS ECU)
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.
| 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
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| A | ||
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| 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.
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| OK | |
| 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
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| OK | |
| 4.CHECK AFS ECU |
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
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| OK | |
| 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.
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| OK | ||
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LEXUS IS250, IS220d / GSE20 ALE20