Lexus ES300 (1997 year). Manual — part 141

I01418

2

CLOCK LOSES OR GAINS TIME

(Clock Side)

(Wire Harness Side)

Is there 10 – 16 V between terminal +B and body
ground?

Below 10V

Detect cause and repair, or recharge battery.

Yes

Adjust or replace clock.

4

3 2

1

4

3

2

1

(a) Check that the battery positive voltage is 10–16 V.

If voltage is not as specified, replace the battery.

(b) Inspect the error of the clock.

Allowable error (per day):

±

1.5 sec.

If the error exceeds the allowable error, replace the clock.

(c) Check that the clock adjusting button is caught in position,
and does not return.

If the button is not returned, repair or replace the clock.

(d) Troubleshoot the clock as follows.

HINT:
Inspect the connector on the wire harness side.

BE–170

–

BODY ELECTRICAL

CLOCK

1554

1997 LEXUS ES300 (RM511U)

Z19485

Horn

Horn Switch

Engine Room
Junction Block

Horn Relay

HORN Fuse

BE067–01

–

BODY ELECTRICAL

HORN SYSTEM

BE–171

1555

1997 LEXUS ES300 (RM511U)

HORN SYSTEM

LOCATION

BE068–03

N21863

N21864

N10342

BE–172

–

BODY ELECTRICAL

HORN SYSTEM

1556

1997 LEXUS ES300 (RM511U)

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,
as shown.

HINT:
Do not disconnect the connector from the horn pad.
(e)

Disconnect the connector from the slip ring.

(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.
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 positive (+) lead from the battery to the terminal
and negative (–) lead to the horn body and check that the horn
blows.
If operation is not as specified, replace the horn.

N14863

1

2

5

3

3

1

5

2

–

BODY ELECTRICAL

HORN SYSTEM

BE–173

1557

1997 LEXUS ES300 (RM511U)

3.

INSPECT HORN RELAY CONTINUITY

Condition

Tester connection

Specified condition

Constant

1 – 2

Continuity

Apply B+ between

terminals 1 and 2.

3 – 5

Continuity

If continuity is not as specified, replace the relay.