Installation
Back Door Courtesy SwitchHL AutoLeveling ECU Failure (B2420)
DESCRIPTION
When the headlight leveling ECU assembly detects a malfunction in itself, this
DTC is stored.
DTC No.
DTC Detecting Condition
Trouble Area
B2420
Malfunction of headlight leveling ECU ...
Operation Check
OPERATION CHECK
1. MALFUNCTION BUZZER
(a) Open circuit or frozen
(1) If an open circuit is detected between the ultrasonic sensors and the clearance
warning ECU assembly, if a sensor malfunction is detected or if a sensor is covered
with foreign matter, ...
Sound Quality is Bad Only when CD is Played (Volume is Too Low)
PROCEDURE
1.
REPLACE CD AND RECHECK
(a) Replace the CD with a new or known good one and check that the malfunction
disappears.
OK:
Malfunction disappears.
OK
END
NG
REPLACE ...