- Malfunction in the headlight leveling motor LH.
- Open or short in the headlight leveling motor LH circuit.
| Last Modified: 11-27-2007 | 1.6 C | |
| Service Category: Vehicle Exterior | Section: Lighting (ext) | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM0000011SY00PX |
| Title: LIGHTING (EXT): LIGHTING SYSTEM: DESCRIPTION (2008 LX570) | ||
|
DTC |
B2417 |
Headlight Beam Level Control Motor LH Malfunction |
|
DTC |
B2418 |
Headlight Beam Level Control Motor RH Malfunction |
DESCRIPTION
The headlight leveling motor receives a signal from the AFS ECU to operate. The AFS ECU receives a signal indicating the operating conditions of the headlight leveling motor.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B2417 |
When either condition below is met: |
|
|
B2418 |
When either condition below is met:
|
|
HINT:
Perform a visual check of the headlight leveling motor before replacing it.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Clear the DTCs
.
(b) Check for DTCs
.
OK:
DTC B2417 or B2418 output does not occur.
|
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (HEADLIGHT LEVELING MOTOR) |
(a) Using the Techstream, perform the Active Test.
AFS
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Drive The Leveling Motor UP |
Leveling motor upward operation |
OFF/UP |
- |
|
Drive The Leveling Motor DOWN |
Leveling motor downward operation |
OFF/DOWN |
- |
OK:
Headlight leveling motors operate normally.
|
|
3. |
READ VALUE USING TECHSTREAM (AFS ECU) |
(a) Using the Techstream, read the Data List.
AFS
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
+B |
AFS ECU power source voltage/Min.: 0 V, Max.: 19.75 V |
11 to 14 V |
- |
OK:
Power supply voltage is 11 to 14 V.
|
|
4. |
CHECK HARNESS AND CONNECTOR (AFS ECU - BODY GROUND) |
(a) Disconnect the E91 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E91-22 (E1) - Body ground |
Always |
Below 1 Ω |
|
|
5. |
CHECK HARNESS AND CONNECTOR (AFS ECU - HEADLIGHT LEVELING ACTUATOR) |
(a) Disconnect the E91 ECU connector.
(b) Disconnect the A42 and A48 actuator connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for LH
for RH
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E91-3 (LHT) - A42-1 (LHIG) |
Always |
Below 1 Ω |
|
E91-27 (LH-) - A42-3 (LHE) |
||
|
E91-30 (LH+) - A42-2 (LHT) |
||
|
E91-3 (LHT) - Body ground |
Always |
10 kΩ or higher |
|
E91-27 (LH-) - Body ground |
||
|
E91-30 (LH+) - Body ground |
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
E91-4 (RHT) - A48-1 (RHIG) |
Always |
Below 1 Ω |
|
E91-28 (RH-) - A48-3 (RHE) |
||
|
E91-11 (RH+) - A48-2 (RHT) |
||
|
E91-4 (RHT) - Body ground |
Always |
10 kΩ or higher |
|
E91-28 (RH-) - Body ground |
||
|
E91-11 (RH+) - Body ground |
|
|
6. |
CHECK HEADLIGHT LEVELING MOTOR (OPERATION) |
(a) Temporarily replace the headlight with a new or normally functioning one.
(b) Check for DTCs
.
OK:
DTC B1247 or B2418 output does not occur.
|
|
|