LS 460 AWD V8-4.6L (1UR-FSE) (2009)
ON (horn button is pressed) appears on screen.
NG -- REPLACE STEERING PAD SWITCH ASSEMBLY WITH MODULATOR
OK -- Continue to next step.
3. INSPECT HORN ASSEMBLY
(a) Remove the horn for low pitched horn See: Service and Repair/Low Pitched Horn/Removal or high pitched horn See: Service and
Repair/High Pitched Horn/Removal.
(b) Check operation of the horn.
OK:
NG -- REPLACE HORN ASSEMBLY
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (FRONT LIGHT ECU - HORN)
(a) Disconnect the B14 ECU connector.
(b) Disconnect the B6 or B10 horn connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
for High pitched horn
for Low pitched horn