51 - Power Steering.pdf - Sam Naprawiam Toyota Corolla E12 2001-2007 ENG up by dunaj2 - j_czaja1

51–1

POWER STEERING

–

POWER STEERING SYSTEM

PRECAUTION

1. HANDLING PRECAUTIONS ON SRS AIRBAG SYSTEM

(a) The vehicle is equipped with SRS (Supplemental Restraint System) such as the driver airbag and front

passenger airbag. Failure to carry out service operation in correct sequence could cause the SRS to

unexpectedly deploy during servicing, possibly leading to a serious accident. Before servicing (includ-

ing removal or installation of parts, inspection or replacement), be sure to read the precautionary notice

for the supplemental restraint system (See page 60–1 ).

5107U–01

2004 COROLLA (RM1037U)

Author:

Date:

1536

51–2

POWER STEERING

–

POWER STEERING SYSTEM

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help you find the cause of the problem. The numbers indicate the probability of the

cause of the problem. Check each part in the order shown. If necessary, repair or replace these parts.

5105L–02

Symptom

Suspect Area

See page

Hard steering

1. Tires (Improperly inflated)

2. Power steering fluid level (Low)

3. Drive belt (Loose)

4. Front wheel alignment (Incorrect)

5. Steering system joints (Worn)

6. Suspension arm ball joints (Worn)

7. Steering column (Binding)

8. Power steering vane pump

9. Power steering gear

28–1

51–3

14–4

26–5

–

26–17

–

51–8

51–18

Poor return

1. Tires (Improperly inflated)

2. Front wheel alignment (Incorrect)

3. Steering column (Binding)

4. Power steering gear

28–1

26–5

–

51–18

Excessive play

1. Steering system joints (Worn)

2. Suspension arm ball joints (Worn)

3. Intermediate shaft, Sliding yoke (Worn)

4. Front wheel bearing (Worn)

5. Power steering gear

–

26–17

–

30–17

51–18

Abnormal noise

1. Power steering fluid level (Low)

2. Steering system joints (Worn)

3. Power steering vane pump

4. Power steering gear

51–3

–

51–8

51–18

2004 COROLLA (RM1037U)

Author:

Date:

1537

51–3

POWER STEERING

–

POWER STEERING SYSTEM

ON–VEHICLE INSPECTION

5105M–02

F40449

1. INSPECT DRIVE BELT

(a) Visually check the belt for excessive wear, frayed cords,

etc.

If any defect is found, replace the drive belt.

HINT:

Cracks on the rib side of a belt are considered acceptable. If the

missing chunks from the ribs are found on the belt, it should be

replaced.

2. BLEED POWER STEERING SYSTEM

(a) Check the fluid level.

(b) Jack up the front of the vehicle and support it with the

stands.

(1) With the engine stopped, turn the wheel slowly from

lock to lock several times.

(d) Lower the vehicle.

(e) Start the engine.

(1) Run the engine at idle for a few minutes.

(f) Turn the steering wheel.

(1) With the engine idling, turn the wheel to left or right

full lock position and keep it there for 2 – 3 seconds,

then turn the wheel to the opposite full lock position

and keep it there for 2 – 3 seconds.

(2) Repeat (1) several times.

(g) Stop the engine.

(h) Check for foaming or emulsification.

Especially, if the system has to be bled twice because of foam-

ing or emulsification, check for fluid leaks in the system.

(i) Check the fluid level.

Normal

Abnormal

F40897

3. CHECK FLUID LEVEL

(a) Keep the vehicle level.

(b) With the engine stopped, check the fluid level in the oil

reservoir.

If necessary, add fluid.

Fluid: ATF DEXRON

II or III

F40898

HINT:

Check that the fluid level is within the HOT LEVEL range on the

reservoir tank. If the fluid is cold, check that it is within the COLD

LEVEL range.

2004 COROLLA (RM1037U)

Author:

Date:

1538

51–4

POWER STEERING

–

POWER STEERING SYSTEM

(d) Turn the steering wheel from lock to lock several times to

raise fluid temperature.

Fluid temperature: 75 – 80

C (167 – 176

Normal

Abnormal

(e) Check for foaming or emulsification.

If foaming or emulsification is identified, bleed the power steer-

ing system.

F40897

5 mm (0.20 in.)

or less

(f) With the engine idling, measure the fluid level in the oil

reservoir.

(g) Stop the engine.

(h) Wait a few minutes and measure the fluid level in the oil

reservoir again.

Maximum fluid level rise: 5 mm (0.20 in.)

If a problem is found, bleed the power steering system.

(i) Check the fluid level.

4. CHECK STEERING FLUID PRESSURE

(a) Disconnect the pressure feed tube from the PS gear (See

page 51–18 ).

(b) Connect SST, as shown in the illustration.

SST 09640–10010 (09641–01010, 09641–01020,

09641–01030)

Engine Idling

Engine Stopped

R11786

NOTICE:

Check that the valve of the SST is in the open position.

(d) Start the engine and run it at idle.

(e) Turn the steering wheel from lock to lock several times to

raise fluid temperature.

Fluid temperature: 75 – 80

C (167 – 176

2004 COROLLA (RM1037U)

Author:

Date:

1539

51–5

POWER STEERING

–

POWER STEERING SYSTEM

Attachment

Pressure

Feed Tube

SST

Attachment

OUT

F42426

Oil

Reservoir

(f) With the engine idling, close the valve of the SST and ob-

serve the reading on the SST.

Fluid pressure:

7,300 – 7,800 kPa (75 – 80 kgf/cm 2 , 1,067 – 1,138 psi)

NOTICE:

PS Gear

Closed

Do not keep the valve closed for more than 10 se-

conds.

PS Vane

Pump

Do not let the fluid temperature become too high.

SST

Z15498

Oil

Reservoir

(g) With the engine idling, open the valve fully.

(h) Measure the fluid pressure at engine speeds of 1,000 rpm

and 3,000 rpm.

Fluid pressure difference:

490 kPa (5 kgf/cm 2 , 71 psi) or less

NOTICE:

Do not turn the steering wheel.

PS Gear

Open

PS Vane

Pump

SST

Z15499

Oil

Reservoir

(i) With the engine idling and valve fully opened, turn the

steering wheel to full lock position.

Fluid pressure:

7,300 – 7,800 kPa (75 – 80 kgf/cm 2 , 1,067 – 1,138 psi)

NOTICE:

Lock Position

PS Gear

Open

Do not maintain lock position for more than 10 se-

conds.

PS Vane

Pump

SST

Do not let the fluid temperature become too high.

Z15500

2004 COROLLA (RM1037U)

Author:

Date:

1540

51 - Power Steering.pdf

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