DESCRIPTION
The headlight ECU sub-assembly LH and headlight ECU sub-assembly RH internally boost the power supply voltage to ensure a constant supplied current for the lo/hi beam LED of their respective headlight.
By monitoring the LED power supply voltage, abnormal current and malfunctions can be detected.
for LED Type Turn Signal Light DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
---|---|---|---|---|
B2439 | Headlight LH Circuit |
Malfunction status:
|
| AFS |
B243A | Headlight RH Circuit |
Malfunction status:
|
| AFS (Sub) |
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
---|---|---|---|---|
B2439 | Headlight LH Circuit |
Malfunction status:
|
| HL AutoLeveling |
B243A | Headlight RH Circuit |
Malfunction status:
|
| HL AutoLeveling (Sub) |
WIRING DIAGRAM
for LED Type Turn Signal Light
for Bulb Type Turn Signal Light (for TMC Made)
for Bulb Type Turn Signal Light (for TMMK Made)
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
Click here
PROCEDURE
1. | CONFIRM MODEL |
(a) Choose the model to be inspected.
Result | Proceed to |
---|---|
for LED Type Turn Signal Light | A |
for Bulb Type Turn Signal Light | B |
B | GO TO STEP 10 |
|
2. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > AFS > Clear DTCs Body Electrical > AFS (Sub) > Clear DTCs
|
3. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.
(f) Check for DTCs.
Body Electrical > AFS > Trouble Codes Body Electrical > AFS (Sub) > 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 7 |
|
4. | CHECK HEADLIGHT UNIT ASSEMBLY LH |
(a) Interchange the headlight unit assembly LH with RH and connect the connectors.
Click here
|
5. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > AFS > Clear DTCs Body Electrical > AFS (Sub) > Clear DTCs
|
6. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.
(f) Check for DTCs.
Body Electrical > AFS > Trouble Codes Body Electrical > AFS (Sub) > Trouble Codes Result | Proceed to |
---|---|
DTC B2439 is output | A |
DTC B243A is output | B |
A | REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH |
B | REPLACE HEADLIGHT UNIT ASSEMBLY LH |
7. | CHECK HEADLIGHT UNIT ASSEMBLY RH |
(a) Interchange the headlight unit assembly RH with LH and connect the connectors.
Click here
|
8. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > AFS > Clear DTCs Body Electrical > AFS (Sub) > Clear DTCs
|
9. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.
(f) Check for DTCs.
Body Electrical > AFS > Trouble Codes Body Electrical > AFS (Sub) > Trouble Codes Result | Proceed to |
---|---|
DTC B243A is output | A |
DTC B2439 is output | B |
A | REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH |
B | REPLACE HEADLIGHT UNIT ASSEMBLY RH |
10. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
|
11. | CONFIRM MODEL |
(a) Choose the model to be inspected.
Result | Proceed to |
---|---|
for TMC Made | A |
for TMMK Made | B |
B | GO TO STEP 19 |
|
12. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
(f) Check for DTCs.
Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > 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 16 |
|
13. | CHECK HEADLIGHT UNIT ASSEMBLY LH |
(a) Interchange the headlight unit assembly LH with RH and connect the connectors.
Click here
|
14. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
|
15. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
(f) Check for DTCs.
Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes Result | Proceed to |
---|---|
DTC B2439 is output | A |
DTC B243A is output | B |
A | REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH |
B | REPLACE HEADLIGHT UNIT ASSEMBLY LH |
16. | CHECK HEADLIGHT UNIT ASSEMBLY RH |
(a) Interchange the headlight unit assembly RH with LH and connect the connectors.
Click here
|
17. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
|
18. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
(f) Check for DTCs.
Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes Result | Proceed to |
---|---|
DTC B243A is output | A |
DTC B2439 is output | B |
A | REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH |
B | REPLACE HEADLIGHT UNIT ASSEMBLY RH |
19. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
(f) Check for DTCs.
Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > 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 23 |
|
20. | CHECK HEADLIGHT ASSEMBLY LH |
(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly LH with RH and connect the connectors.
Click here
|
21. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
|
22. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
(f) Check for DTCs.
Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes Result | Proceed to |
---|---|
DTC B2439 is output | A |
DTC B243A is output | B |
A | REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH |
B | REPLACE HEADLIGHT ASSEMBLY LH |
23. | CHECK HEADLIGHT ASSEMBLY RH |
(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly RH with LH and connect the connectors.
Click here
|
24. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
|
25. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Operate the light control switch to turn on the low beam headlights and wait 10 seconds or more.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
(f) Check for DTCs.
Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes Result | Proceed to |
---|---|
DTC B243A is output | A |
DTC B2439 is output | B |
A | REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH |
B | REPLACE HEADLIGHT ASSEMBLY RH |