Lexus ES300 (1997 year). Service manual - part 277

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.

BR061–01

–

BRAKE

BRAKE SYSTEM

BR–1

1116

1997 LEXUS ES300   (RM511U)

BRAKE SYSTEM

PRECAUTION

1.

Care must be taken to replace each part properly as it could affect the performance of the brake
system and result in a driving hazard. Replace the parts with parts have the same part number
or equivalent.

2.

It is very important to keep parts and the area clean when repairing the brake system.

3.

If the vehicle is equipped with a mobile communication system, refer to the precautions in the
IN section.

BR062–01

BR–2

–

BRAKE

TROUBLESHOOTING

1117

1997 LEXUS ES300   (RM511U)

TROUBLESHOOTING

PROBLEM SYMPTOMS TABLE

Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely
cause of the problem. Check each part in order. If necessary, replace these parts.

Symptom

Suspect Area

See page

Lower pedal or spongy pedal

1. Brake system (Fluid leaks)

2. Brake system (Air in)

3. Piston seals

 

(Worn or damaged)

4. Master cylinder (Faulty)

5. Booster push rod (Out of adjustment)

DI–269

DI–321

BR–4

BR–26

BR–35

BR–12

BR–22

Brake drag

1. Brake pedal freeplay (Minimal)

2. Parking brake pedal travel (Out of adjustment)

3. Parking brake wire (Sticking)

4. Rear brake shoe clearance (Out of adjustment)

5. Pad (Cracked or distorted)

6. Piston (Stuck)

7. Piston (Frozen)

8. Tension or return spring (Faulty)

9. Booster push rod (Out of adjustment)

10. Vacuum leaks for booster system

11. Master cylinder (Faulty)

BR–6

BR–8

–

BR–44

BR–23

BR–32

BR–26

BR–35

BR–26

BR–35

BR–41

BR–22

BR–20

BR–12

Brake pull

1. Piston (Stuck)

2. Pad (Oily)

3. Piston (Frozen)

4. Disc (Scored)

5. Pad (Cracked or distorted)

BR–26

BR–35

BR–23

BR–32

BR–26

BR–35

BR–26

BR–35

BR–23

BR–32

Hard pedal but brake inefficient

1. Brake system (Fluid leaks)

2. Brake system (Air in)

3. Piston (Stuck)

4. Pad (Cracked or distorted)

5. Pad (Oily)

6. Pad (Glazed)

7. Disc (Scored)

8. Booster push rod (Out of adjustment)

9. Vacuum leaks for booster system

DI–269

DI–321

BR–4

BR–26

BR–35

BR–23

BR–32

BR–23

BR–32

BR–23

BR–32

BR–26

BR–35

BR–22

BR–20