Toyota Venza: Headlight Leveling ECU Power Source Circuit
DESCRIPTION
This circuit detects the state of the ignition switch, and sends it to the headlight leveling ECU assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (BATTERY - HEADLIGHT LEVELING ECU ASSEMBLY) |
|
(a) Disconnect the A40 headlight leveling ECU assembly connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A40-1 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
|
A40-1 (IG) - Body ground |
Ignition switch off |
Below 1 V |
|
*1 |
Front view of wire harness connector (to Headlight Leveling ECU assembly) |
| NG | .gif) |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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|
2. |
CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - BODY GROUND) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Headlight Beam Level Control Actuator Circuit
DESCRIPTION
The headlight leveling ECU assembly actuates the headlight leveling motor according
to vehicle conditions.
WIRING DIAGRAM
PROCEDURE
1.
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