DESCRIPTION
A DTC is stored when the headlight ECU sub-assembly receives a light source malfunction signal from its respective headlight unit. The headlight ECU sub-assembly LH stores DTC B2439 or B243A.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Note |
---|---|---|---|---|
B2439 |
Headlamp LH Circuit |
headlight ECU sub-assembly LH light source malfunction |
|
- |
B243A |
Headlamp RH Circuit |
headlight ECU sub-assembly RH light source malfunction |
|
- |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.
Click here
PROCEDURE
1. |
CLEAR DTC |
(a) Clear the DTCs.
Click here
Body Electrical > HL AutoLeveling > Clear DTCs
|
2. |
CHECK FOR DTC |
(a) Turn the ignition switch to ON.
(b) Operate the light control switch to turn on the low beam headlights.
(c) Check for DTCs.
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Body Electrical > HL AutoLeveling > Trouble CodesOK:
DTC B2439 and B243A are not output.
Result |
Proceed to |
---|---|
OK |
A |
NG (DTC B2439 is output) |
B |
NG (DTC B243A is output) |
C |
A |
USE SIMULATION METHOD TO CHECK |
C |
GO TO STEP 6 |
|
3. |
REPLACE HEADLIGHT UNIT ASSEMBLY LH |
(a) Replace the headlight unit assembly LH with a new or known good one.
|
4. |
CLEAR DTC |
(a) Clear the DTCs.
Click here
Body Electrical > HL AutoLeveling > Clear DTCs
|
5. |
CHECK FOR DTC |
(a) Turn the ignition switch to ON.
(b) Operate the light control switch to turn on the low beam headlights.
(c) Check for DTCs.
Click here
Body Electrical > HL AutoLeveling > Trouble CodesOK:
DTC B2439 is not output.
OK |
END (HEADLIGHT UNIT ASSEMBLY LH WAS DEFECTIVE) |
NG |
REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH |
6. |
REPLACE HEADLIGHT UNIT ASSEMBLY RH |
(a) Replace the headlight unit assembly RH with a new or known good one.
|
7. |
CLEAR DTC |
(a) Clear the DTCs.
Click here
Body Electrical > HL AutoLeveling > Clear DTCs
|
8. |
CHECK FOR DTC |
(a) Turn the ignition switch to ON.
(b) Operate the light control switch to turn on the low beam headlights.
(c) Check for DTCs.
Click here
Body Electrical > HL AutoLeveling > Trouble CodesOK:
DTC B243A is not output.
OK |
END (HEADLIGHT UNIT ASSEMBLY RH WAS DEFECTIVE) |
NG |
REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH |
Toyota CH-R Service Manual > Automatic High Beam System: Automatic High Beam System (B124B)
DESCRIPTION
This DTC is stored when the main body ECU (multiplex network body ECU) detects
malfunctions in the automatic high beam system.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
B124B
Automatic High Beam ...
Toyota CH-R Service Manual > Audio And Visual System(for Radio And Display Type): Voice Guidance does not Function
CAUTION / NOTICE / HINT
NOTICE:
Depending on the parts that are replaced during vehicle inspection or
maintenance, performing initialization, registration or calibration may
be needed. Refer to Precaution for Audio and Visual System.
Click here
When replacing the ...