Toyota Celica 2005 Repair Manual page 2306

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2005 CELICA (RM1131U)
BODY ELECTRICAL − HORN SYSTEM
INSPECTION
1. INSPECT HORN SWITCH
(a) Disconnect the negative (−) terminal from the battery.
(b) Remove the left and right covers from the steering wheel.
(c) Using a torx® socket wrench, loosen the 2 bolts.
(d) Pull up the horn pad and place it on the steering column.
HINT:
Do not disconnect the connector from the horn pad.
(e) Disconnect the connector from the slip ring.
I11733
(f) Check that no continuity exists between terminal 6 of the
connector and body ground.
(g) Check that continuity exists between terminal 6 of the
connector and body ground when the horn contact plate
is pressed against the steering spoke assembly.
If continuity is not as specified, repair or replace the steering
wheel or wire harness as necessary.
(h) Install the horn pad in place, and using a torx® socket
wrench, torque the 2 bolts.
I11734
Torque: 7.1 N·m (72 kgf·cm, 62 in.·lbf)
(i) Install the left and right covers.
(j) Connect the negative (−) terminal to the battery.
2. INSPECT HORN OPERATION
Connect the battery positive (+) lead from the battery to the ter-
minal and battery negative (−) lead to the horn body and check
that the horn blows.
If operation is not as specified, replace the horn.
BE3907
3. INSPECT HORN RELAY CONTINUITY
Condition
Constant
5
Apply B+ between
terminals 1 and 2.
2
If continuity is not as specified, replace the relay.
I01200
2305
Tester connection Specified condition
1 − 2 Continuity
3 − 5 Continuity
BE−131
BE0FZ−27