DESCRIPTION
The No. 1 headlight ECU sub-assembly controls the high beam headlights.
WIRING DIAGRAM
for Multiple Beam Headlight
for Single Beam Headlight
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
PROCEDURE
1. | CONFIRM MODEL |
(a) Choose the model to be inspected.
Result | Proceed to |
---|---|
for Multiple Beam Headlight | A |
for Single Beam Headlight | B |
B | ![]() | GO TO STEP 3 |
|
2. | PERFORM ACTIVE TEST USING TECHSTREAM |
(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 / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Body Electrical > AFS > Active Test Tester Display | Measurement Item | Control Range | Diagnostic Note |
---|---|---|---|
Headlight High Beam | High beam headlights | OFF or ON | - |
Tester Display |
---|
Headlight High Beam |
OK:
High beam headlights illuminate.
Result | Proceed to |
---|---|
OK | A |
NG (LH side high beam light does not illuminate) | B |
NG (RH side high beam light does not illuminate) | C |
A | ![]() | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
B | ![]() | GO TO STEP 4 |
C | ![]() | GO TO STEP 6 |
3. | PERFORM ACTIVE TEST USING TECHSTREAM |
(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 / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Body Electrical > HL AutoLeveling > Active Test Tester Display | Measurement Item | Control Range | Diagnostic Note |
---|---|---|---|
Headlight High Beam | High beam headlights | OFF or ON | - |
Tester Display |
---|
Headlight High Beam |
OK:
High beam headlights illuminate.
Result | Proceed to |
---|---|
OK | A |
NG (LH side high beam light does not illuminate) | B |
NG (RH side high beam light does not illuminate) | C |
A | ![]() | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
C | ![]() | GO TO STEP 6 |
|
4. | CHECK HEADLIGHT UNIT LH |
(a) Interchange the headlight unit LH with RH and connect the connectors.
Click here
|
5. | CHECK OPERATION (HIGH BEAM HEADLIGHT) |
(a) Check that the high beam headlight operates normally.
OK:
High beam headlight operates normally.
Result | Proceed to |
---|---|
OK | A |
NG (for TMC Made) | B |
NG (for TMMC Made) | C |
A | ![]() | REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH |
B | ![]() | REPLACE HEADLIGHT UNIT LH |
C | ![]() | REPLACE HEADLIGHT ASSEMBLY LH |
6. | CHECK HEADLIGHT UNIT RH |
(a) Interchange the headlight unit RH with LH and connect the connectors.
Click here
|
7. | CHECK OPERATION (HIGH BEAM HEADLIGHT) |
(a) Check that the high beam headlight operates normally.
OK:
High beam headlight operates normally.
Result | Proceed to |
---|---|
OK | A |
NG (for TMC Made) | B |
NG (for TMMC Made) | C |
A | ![]() | REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH |
B | ![]() | REPLACE HEADLIGHT UNIT RH |
C | ![]() | REPLACE HEADLIGHT ASSEMBLY RH |
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