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.
Click here
(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 |
READ NEXT:
Vehicle Specifications have not been Stored (B2451)
DESCRIPTION This DTC is output if the vehicle variation information is not written to the headlight ECU sub-assembly LH. The headlight ECU sub-assembly LH outputs DTC B2451. DTC No. Detection Ite
Right Headlight ECU Variation Error (B2455)
DESCRIPTION This DTC is output when a headlight ECU sub-assembly RH that is incompatible with the vehicle is installed. The headlight ECU sub-assembly LH outputs DTC B2455. DTC No. Detection Item
Left Headlight ECU Variation Error (B2456)
DESCRIPTION This DTC is output when a headlight ECU sub-assembly LH that is incompatible with the vehicle is installed. The headlight ECU sub-assembly LH outputs DTC B2456. DTC No. Detection Item
SEE MORE:
Removal
REMOVAL CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The procedure described below is for the LH side.
PROCEDURE 1. REMOVE CENTER BACK DOOR GARNISH Click here 2. REMOVE BACK DOOR SIDE GARNISH LH Click here 3. REMOVE BACK DOOR SIDE GARNISH RH Click here
Open Circuit in Main Relay 1 (C1311,C1312)
DESCRIPTION The ABS main relay supplies power to the changeover solenoid and the linear solenoid. The ABS main relay remains on for approximately 2 minutes after the power switch is turned off and the input of brake pedal operation signals stops, and supplies power to the system to keep it ready to
