Lexus IS250 IS220d GSE20 ALE20 - LIGHTING
PERFORM ACTIVE TEST BY INTELLIGENT TESTER
CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING MOTOR - AFS ECU)
CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING MOTOR - HEADLIGHT ASSEMBLY)
INSPECT HEADLIGHT LEVELING MOTOR (LH AND/OR RH)
DTC B2417 Headlight Beam Level Control Motor LH Malfunction
DTC B2418 Headlight Beam Level Control Motor RH Malfunction
DESCRIPTION
The leveling actuator (headlight leveling motor) receives a signal from the AFS ECU to operate. The AFS ECU receives signals regarding the operating conditions of the leveling actuator (headlight leveling motor).
| DTC No. | DTC Detection Condition | Trouble Area |
| B2417 | Malfunction in headlight leveling motor LH Open or short in headlight leveling motor LH circuit |
Headlight leveling motor LH (Headlight assembly LH) Wire harness or connector AFS ECU |
| B2418 | Malfunction in headlight beam level control motor RH Open or short in headlight beam level control motor RH circuit |
Headlight leveling 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 the headlight leveling motor operation with the intelligent tester.
| Item | Test Details | Diagnostic Note |
| Drive The Leveling Motor | Drive the leveling motor UP / OFF | - |
| Drive The Leveling Motor | Drive the leveling motor DOWN / OFF | - |
- OK:
- Headlight leveling motor is operated.
- 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.CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING MOTOR - AFS ECU) |
Disconnect the B12 and B2 headlight assembly connectors.
Disconnect the A28 AFS ECU connector.
Measure the resistance according to the value (s) in the table below.
- Standard resistance:
- LH Side (B2417):
Tester Connection Condition Specified Condition 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 A28-29 (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 (B2418):
Tester Connection Condition Specified Condition 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 A28-13 (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 | |
| 3.CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING MOTOR - HEADLIGHT ASSEMBLY) |
Disconnect the headlight leveling motor connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
- LH Side:
Tester Connection Condition Specified Condition B12-15 (LL1+) - 3 Always Below 1 Ω B12-14 (LL1-) - 4 Always Below 1 Ω B12-13 (LL2+) - 1 Always Below 1 Ω B12-12 (LL2-) - 2 Always Below 1 Ω B12-15 (LL1+) - Body ground Always 10 kΩ or higher B12-14 (LL1-) - Body ground Always 10 kΩ or higher B12-13 (LL2+) - Body ground Always 10 kΩ or higher B12-12 (LL2-) - Body ground Always 10 kΩ or higher - RH Side:
Tester Connection Condition Specified Condition B2-15 (LR1+) - 3 Always Below 1 Ω B2-14 (LR1-) - 4 Always Below 1 Ω B2-13 (LR2+) - 1 Always Below 1 Ω B2-12 (LR2-) - 2 Always Below 1 Ω B2-15 (LR1+) - Body ground Always 10 kΩ or higher B2-14 (LR1-) - Body ground Always 10 kΩ or higher B2-13 (LR2+) - Body ground Always 10 kΩ or higher B2-12 (LR2-) - Body ground Always 10 kΩ or higher
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| OK | |
| 4.INSPECT HEADLIGHT LEVELING MOTOR (LH AND/OR RH) |
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
- RH Side (B2418):
Tester Connection Condition Specified Condition 1 - 2 Always 5.8 to 12.5 Ω 3 - 4 Always 5.8 to 12.5 Ω - LH Side (B2417):
Tester Connection Condition Specified Condition 1 - 2 Always 5.8 to 12.5 Ω 3 - 4 Always 5.8 to 12.5 Ω
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| OK | ||
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