Lighting System Headlight Beam Level Warning Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT COMBINATION METER ASSEMBLY
CHECK HARNESS AND CONNECTOR (BATTERY - COMBINATION METER ASSEMBLY)
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECU)
LIGHTING SYSTEM - Headlight Beam Level Warning Circuit |
DESCRIPTION
The headlight beam level control system warning light in the combination meter assembly comes on for approximately 3 seconds when the ignition switch is turned to the ON position. The warning light also comes on when the headlight beam level control ECU detects a malfunction.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.INSPECT COMBINATION METER ASSEMBLY |
Remove the combination meter assembly.
Apply battery voltage to the combination meter assembly connector.
Check that the warning light comes on.
- OK:
Measurement Condition
| Specified Condition
|
Battery positive (+) → Terminal F1-13 (IG+)
Battery negative (-) → Terminal F2-5 (LVWG)
| Warning light comes on.
|
| | REPLACE COMBINATION METER ASSEMBLY |
|
|
| 2.CHECK HARNESS AND CONNECTOR (BATTERY - COMBINATION METER ASSEMBLY) |
Disconnect the F1 combination meter assembly connector.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection
| Switch Condition
| Specified Condition
|
F1-13 (IG+) - Body ground
| Ignition switch ON
| 10 to 14 V
|
Ignition switch OFF
| Below 1 V
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECU) |
Disconnect the F2 combination meter assembly connector.
Disconnect the A20 headlight beam level control ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection
| Condition
| Specified Condition
|
A20-6 (WNG) - F2-5 (LVWG)
| Always
| Below 1 Ω
|
A20-6 (WNG) - Body ground
| Always
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK |
|
|
|
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
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