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 | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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 |
Maintenance requirements
To ensure safe and economical driving, day-to-day care and regular maintenance
is essential. It is the owner’s responsibility to perform regular checks. Toyota
recommends the following maintenance.
- General maintenance
Should be performed on a d ...
Speaker Output Short (B15C3)
DESCRIPTION
This DTC is stored when a malfunction occurs in the speakers.
DTC No.
DTC Detection Condition
Trouble Area
B15C3
A short is detected in the speaker output circuit
...
BUS IC Communication Malfunction (B1497/97)
DESCRIPTION
The air conditioning harness connects the A/C amplifier and each servo. The A/C
amplifier supplies power and sends operation instructions to each servo through
the air conditioning harness. Each servo sends the damper position information to
...