Toyota Corolla Cross: Headlight LH Circuit (B243900,B243A00)
DESCRIPTION
The light control LED ECU supplies internally boosted voltage to the light control LED ECU so that the current supplied to the LED is always maintained at a constant value.
These DTCs are also output when the main body ECU (multiplex network body ECU) detects malfunctions while monitoring the applied voltage.
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
B243900 | Headlight LH Circuit | Detection condition:
- Ignition switch is to ON, low beam headlights illuminated
Malfunction status:
- Headlight unit LH malfunction
- Headlight unit LH power source and signal malfunction
Malfunction duration:
|
- Headlight unit assembly LH
- H-LP LH relay
- Power distribution box assembly
- Main body ECU (multiplex network body ECU)
- Harness or connector
|
B243A00 |
Headlight RH Circuit | Detection condition:
- Ignition switch is to ON, low beam headlights illuminated
Malfunction status:
- Headlight unit RH malfunction
- Headlight unit RH power source and signal malfunction
Malfunction duration:
|
- Headlight unit assembly RH
- H-LP RH relay
- Power distribution box assembly
- Main body ECU (multiplex network body ECU)
- Harness or connector
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
Body Electrical > Main Body > Clear DTCs
NEXT |
| |
(a) Check for DTCs.
Body Electrical > Main Body > Trouble Codes
OK:
DTC B243900 and B243A00 are not output.
Result | Proceed to |
DTCs are not output | A |
B243900 is output | B |
B243A00 is output | C |
A |
| USE SIMULATION METHOD TO CHECK |
READ NEXT:
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DESCRIPTION These DTCs are stored if a CAN communication malfunction occurs between the main body ECU (multiplex network body ECU) and other ECUs.
DTC No. Detection Item
DTC Detection Condi
DESCRIPTION The steering sensor receives the turn signal switch information and controls the turn signal lights. WIRING DIAGRAM
PROCEDURE
1.
READ VALUE USING GTS (a) Read the Data List a
SEE MORE:
DESCRIPTION The temperature sensor of the compressor with motor assembly detects the A/C inverter temperature.
If the temperature exceeds the maximum, operation of the compressor with motor assembly will be stopped, and this DTC will be stored.
DTC No. Detection Item
DTC Detection Con
DIAGNOSIS SYSTEM
CHECK WARNING LIGHT
NOTICE:
When there is a problem with the tire pressure warning system, the tire
pressure warning light blinks at 0.5 second intervals, and illuminates after
1 minute.
When the malfunction has been corrected, the tire pressure warning light
goes