Content .. 277 278 279 280 ..

Honda Odyssey 2004. Manual - part 279

−

Ｓ０Ｘ４Ａ００Ｆ０００００００００００ＨＢＡＴ００

Symptom

Procedure(s)

Also check for:

17-4

Power Steering

Symptom Troubleshooting Index

Find the symptom in the chart below, and do the related procedures in the order listed until you find the cause.

•

Hard Steering

Troubleshoot the system (see page 17-6).

Modified
suspension
Tire sizes, tire
varieties, and
air pressure

Assist (excessively
light steering at high
speed)

Check the rack guide adjustment (see page 17-29).

Front wheel
alignment (see
page 18-5).
Tire Pressure

Shock or vibration
when the steering
wheel is turned to
full lock

1.
2.

3.
4.

Check the rack guide adjustment (see page 17-29).
Check the power steering pump belt for slippage and adjust as
necessary (see page 17-12).
Replace the steering gearbox (see page 17-30).
Check the power steering fluid pressure with T/N 07406-0010001
(see page 17-9) or with T/N 074060-001000A (see page 17-10).

Steering wheel will
not return smoothly

1.
2.
3.

Check cylinder lines A and B for deformation.
Check wheel alignment (see page 18-5).
Replace the steering gearbox (see page 17-30).

Uneven or rough
steering

1.
2.
3.
4.

Check the rack guide adjustment (see page 17-29).
Check power steering pump belt adjustment (see page 17-12).
Check for low or erratic engine idle speed (see page 11-201).
Check for air in the power steering system due to low fluid level or
an air leak at the pump inlet hose.
Check for low fluid level in the power steering reservoir due to
possible leaks in system.
Replace the steering gearbox (see page 17-30).

Steering wheel kicks
back during wide
turns

1.
2.

Check power steering pump belt adjustment (see page 17-12).
Check the power steering pump fluid pressure with T/N 07406-
0010001 (see page 17-9) or with T/N 07406-001000A
(see page 17-10).

Humming noise from
the power steering
system

2.
3.

Check when the noise occurs:

If the noise is heard 2

3 minutes after starting the engine in

cold weather, this is normal.
If the noise is heard when the steering wheel is turned with the
vehicle stopped, this is normal due to the fluid pulsation.

Check if the high-pressure hose is touching the sub-frame or body.
Check for air bubbles in the power steering fluid and leak on inlet
side of pump.
Check for particle contamination of fluid and restricted filter in the
reservoir.

Pump pressure

03/07/29 09:48:52 61S0X050_170_0004

−

17-5

•
•

•

•
•

•

•
•

•

•
•

•

Power steering rack
rattle or chattering

Check for loose steering components (tie-rod and ball joints).
Tighten or replace as necessary.
Check the steering column shaft for wobbling. If the steering
column wobbles, replace the steering column assembly (see page
17-25).
Check the rack guide adjustment (see page 17-29).
Check the power steering pump pulley.

If the pulley is loose, tighten it (see step 33 on page 17-21).
If the pump shaft is loose, replace the pump (see page 17-16).

Hissing noise/
foaming fluid in
reservoir

Check the fluid level. If low, fill the power steering reservoir to the
proper level and check for leaks.
Check the reservoir for leaks.
Check for a damaged inlet hose or loose hose clamp allowing air into
the suction side of the system.
Check the power steering pump shaft oil seal for leaks.

Air in the P/S
fluid

Noise from the
power steering pump

Compare the pump noise at normal operating temperature to
another alike vehicle, (pump noise up to 2

3 minutes after starting

the engine in cold weather is normal).
Remove and inspect the power steering pump for wear and damage
(see page 17-17).

P/S pump
pressure
Air in the P/S
fluid

Squeaking from the
power steering pump

Check the power steering pump belt tension and adjust as necessary
(see page 17-12).

Fluid Leaks from the
steering gearbox

Fluid leaks from the left tie-rod boot:
Replace the valve body unit.
Replace the cylinder end seal on the gearbox side.
Fluid leaks from the right tie-rod boot: Replace the cylinder end seal.
Fluid leaks from pinion shaft near the lower steering joint bolt:
Replace the valve body unit.

Fluid leaks from the
power steering line

Fluid leaks from the cylinder line A or B connections (flare nuts):
Tighten the connection and retest. If it still leaks, replace the fitting
O-rings.
Fluid leaks from a damaged cylinder line A or B: Replace the cylinder
line.
Fluid leaks from the pump outlet hose or return line fitting on the
valve body unit (flair nuts): Tighten the fitting and retest. If it still
leaks, replace the hose, the line, or valve body unit as necessary.

Fluid leaks from the
power steering pump

Fluid leaks from the front oil seal: Replace the front oil seal.
Fluid leaks from the power steering pump housing: Replace the
leaking O-rings or seals (see page 17-17), and if necessary replace
the power steering pump (see page 17-16).

Fluid leaks from the
power steering
reservoir

Fluid leaks from around the reservoir cap:
Fluid level is too high: Drain the reservoir to the proper level.
Aerated fluid: Check for an air leak on the inlet side of pump.
Fluid leaks from reservoir: Check for the reservoir for cracks and
replace as necessary.

Fluid leaks from the
power steering pump
outlet hose
(high-pressure)

Check the fitting for loose bolts. If the bolts are tight, replace the
fitting O-ring.
Fluid leaks at the swagged joint: Replace the outlet hose.

Fluid leaks from the
power steering pump
inlet hose
(low-pressure)

Check the hose for damage, deterioration, or improper assembly.
Replace or repair as necessary.

03/07/29 09:48:52 61S0X050_170_0005

−

Ｓ０Ｘ４Ａ００Ｆ０００００００００００ＦＡＡＴ００

Hard steering

YES
NO

YES

17-6

Power Steering

Symptom Troubleshooting

1. Check the power assist (see page 17-7).

Go to step 2.

Power assist is OK.

2. Measure steady-state fluid pressure from the pump

at idle with T/N 07406-0010001 (see step 9 on page
17-9) or T/N 07406-001000A (see step 8 on page 17-
10).

Go to step 3.

Go to step 7.

3. Measure the pump relief pressure at idle with

T/N 07406-0010001 (see step 10 on page 17-9) or
T/N 07406-001000A (see step 9 on page 17-10).

Go to step 4.

Go to step 8.

4. With a spring scale, measure the power assist in

both directions, to the left and to the right.

Go to step 5.

Go to step 9.

5. Measure the fluid pressure with T/N 07406-0010001

(see step 11 on page 17-9) or T/N 07406-001000A
(see step 10 on page 17-10) with both pressure
gauge valves open (if so equipped), while turning
the steering wheel fully to the left and fully to the
right.

Go to step 6.

Replace the gearbox.

6. Adjust the rack guide (see page 17-29), and retest.

Repair is completed.

Replace the gearbox.

7. Check for feed and return lines between the pump

and the gearbox for clogging and deformation.

Repair or replace the lines.

Replace the valve body unit.

8. Check the flow control valve (see page 17-17) for

smooth movement and leaks.

Replace the pump assembly.

Replace the flow control valve.

9. Check the cylinder lines A and B for deformation

(see page 17-34).

Replace the lines.

Go to step 10.

10. Check for a bent rack shaft or misadjusted rack

guide (too tight).

Replace the rack shaft or readjust the rack

guide.

Replace the valve body unit.

Is the power assist mor e than 29 N ( 3.0 kgf ,
6.6 lbf )?

Is the pr essur e 1,500 kPa ( 15 kgf / cm , 213 psi) or
less?

Is the pr essur e 8.300

8.800 kPa ( 85

90 kgf / cm ,

1.210

1.280 psi) or less?

Ar e the two measur ements within 5.0 N ( 0.51 kgf ,
1.12 lbf ) of each other ?

Is the pr essur e 8.300

8.800 kPa ( 85

90 kgf / cm ,

1.210

1.280 psi) or less?

Is the steer ing OK ?

Ar e the lines clogged or def or med?

Is the f low contr ol valve OK ?

Ar e the A or B lines def or med?

Is the r ack shaf t bent or the r ack guide adjusted
too tight?

03/07/29 09:48:52 61S0X050_170_0006

＊０１

Ｓ０Ｘ４Ａ００Ｆ００００００５７１６１ＭＡＡＴ００

１１

Ｓ０Ｘ４Ａ００Ｆ０００００００００００ＭＡＡＴ１０

−

17-7

Steering Wheel Rotational Play
Check

Power Assist Check

ROTATIONAL PLAY: 0

10 mm (0

0.39 in.)

1. Turn the front wheels to the straight ahead position.

2. Measure how far you can turn the steering wheel

left and light without moving the front wheels.

• If the play is within the limit, the gearbox and

steering linkages are OK.

• If the play exceeds the limit, adjust the rack guide

(see page 17-29). If the play is still excessive after
rack guide adjustment, inspect the steering
linkage and gearbox (see page 17-8).

NOTE: This test should be done with original equipment
tires and wheels at the correct tire pressure.

1. Check the power steering fluid level (see page 17-

14) and pump belt tension (see page 17-12).

2. Start the engine, let it idle, and turn the steering

wheel from lock-to-lock several times to warm up
the fluid.

3. Attach a commercially available spring scale to the

steering wheel. With the engine idling and the
vehicle on a clean, dry floor, pull the scale as
shown and read it as soon as the tires begin to turn.

• If the scale reads no more than 30 N (3.1 kgf,

6.8 lbf) the gearbox and pump are OK.

• If the scale reads more than 30 N (3.1 kgf, 6.8 lbf)

go to hard steering troubleshooting
(see page 17-6).

03/07/29 09:48:53 61S0X050_170_0007

Content .. 277 278 279 280 ..