Lexus NX: Left Low Beam Fan Malfunction (B243D,B243E)
DESCRIPTION
This DTC is output when the low beam fan is malfunctioning and the low beam illumination is dark.
The headlight ECU sub-assembly LH outputs DTC B243D and B243E
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B243D | Left Low Beam Fan Malfunction | The headlight assembly LH low beam fan is malfunctioning and the low beam illumination is dark. |
|
| B243E | Right Low Beam Fan Malfunction | The headlight assembly RH low beam fan is malfunctioning and the low beam illumination is dark. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
After the headlight ECU sub-assembly LH is replaced, vehicle information registration and initialization are necessary.
Click here .gif)
PROCEDURE
| 1. | CHECK FOR DTC |
(a) Clear the DTCs.
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(b) Turn the power switch on (IG).
(c) Turn on the headlights using the headlight dimmer switch.
(d) Check for DTCs.
Click here
| Result | Proceed to |
|---|---|
| DTCs B243D or B243E are not output | A |
| DTC B243D is output | B |
| DTC B243E is output | C |
| A | .gif) | USE SIMULATION METHOD TO CHECK |
| C | | GO TO STEP 3 |
|
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| 2. | CHECK HEADLIGHT UNIT ASSEMBLY LH |
(a) Interchange the headlight unit assembly LH with RH and connect the connectors to them.
Click here
(b) Clear the DTCs.
Click here
(c) Check for DTCs.
Click here
| Result | Proceed to |
|---|---|
| DTC B243D is output | A |
| DTC B243E is output | B |
| A | | REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH |
| B | | REPLACE HEADLIGHT UNIT ASSEMBLY LH |
| 3. | CHECK HEADLIGHT UNIT ASSEMBLY RH |
(a) Interchange the headlight unit assembly RH with LH and connect the connectors to them.
Click here
(b) Clear the DTCs.
Click here
(c) Check for DTCs.
Click here
| Result | Proceed to |
|---|---|
| DTC B243E is output | A |
| DTC B243D is output | B |
| A | | REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH |
| B | | REPLACE HEADLIGHT UNIT ASSEMBLY LH |
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