Ford Galaxy / Ford S-MAX. Manual - part 21

Power Steering Zip Noise

Driveline Noise and Vibration

Suspension Noise and Vibration

Pinpoint Tests

NOTE: These Pinpoint Tests are designed to take the technician through a step-by-step
diagnosis procedure to determine the cause of a condition. It may not always be
necessary to follow the chart to its conclusion. Carry out only the pinpoint test steps
necessary to correct the condition. Then check the operation of the system to make sure
the condition has been corrected.

After verifying that the condition has been corrected, make sure all components removed
have been installed.

Clockspring.

REFER to:

Clockspring

(501-20B Supplemental
Restraint System, Removal
and Installation).

Symptom

Possible Sources

Action

Power steering system zip noise – occurs when
hydraulic fluid does not flow freely through the
power steering pump supply hose from steering
fluid reservoir to power steering pump causing
cavitation at the pump. Zip is primarily a cold
weather start-up phenomenon (below -10°C).

High viscosity of
power steering
fluid at low
temperature.

Certain amount of noise
level acceptable, not a
safety critical item.

Aeration of the
power steering
fluid.

BLEED the power steering
system.
REFER to:

Power Steering

System Bleeding

(211-00

Steering System -
General Information,
General Procedures).

Symptom

Possible Sources

Action

Shake and vibration while driving

Wheel end vibration.
Engine/transmission.

GO to Pinpoint Test

Tip-in moan

Air cleaner.
Power assisted steering.
Powertrain.
Powertrain/drivetrain mounts.
Exhaust system.

GO to Pinpoint Test

Idle boom/shake/vibration/shudder

Cable(s)/hose(s).
Powertrain/drivetrain mounts.
Exhaust system.
Belt/pulleys.

GO to Pinpoint Test

Symptom

Possible Sources

Action

Wheel end vibration analysis

Suspension.
Wheel bearings.

GO to Pinpoint Test

Non-axle noise

Trim panels.
Air conditioning (A/C) system.
Accessories.

GO to Pinpoint Test

PINPOINT TEST A : SHAKE AND VIBRATION WHILE DRIVING

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

A1: NEUTRAL COAST

Carry out the neutral coast test.

Does the vibration disappear during the neutral coast test?
Yes

GO to A2

GO to Pinpoint Test

A2: CHECK THE POWERTRAIN/DRIVETRAIN MOUNTS

Carry out the powertrain/drivetrain mount neutralizing procedure

Are the mounts OK?
Yes

Vehicle condition corrected. ROAD TEST as necessary.

INSTALL new powertrain/drivetrain mounts as necessary. ROAD TEST as
necessary.

PINPOINT TEST B : TIP-IN MOAN

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

B1: CHECK THE AIR CLEANER

Check the condition of the air cleaner mounts, inlet tube, outlet tube,
resonators and all other components associated with the air induction

system for correct installation and tightness of all connections.

Are the components OK?
Yes

GO to B2

REPAIR or INSTALL new components as necessary. ROAD TEST as
necessary.

B2: CHECK THE EXHAUST SYSTEM

Carry out the exhaust system neutralizing procedure.
REFER to:

Exhaust System Neutralizing

(100-04 Noise, Vibration and

Harshness, General Procedures).

Is the exhaust system OK?
Yes

GO to B3

REPAIR as necessary. ROAD TEST as necessary.

B3: CHECK THE POWER STEERING

Remove the accessory drive belt and test for tip-in moan. REFER to:

Accessory Drive Belt

(303-05A Accessory Drive - 2.0L Duratec-HE

(107kW/145PS) - MI4/2.0L Duratec-HE Flex Fuel (107kW/145PS) -
MI4/2.3L Duratec-HE (118kW/160PS) - MI4, Removal and
Installation),

Accessory Drive Belt

(303-05C Accessory Drive - 2.5L Duratec

(162kW/220PS) - VI5, Removal and Installation),

Accessory Drive Belt

(303-05E Accessory Drive - 2.0L Duratorq-TDCi

(85kW/115PS) - DW/2.0L Duratorq-TDCi (100kW/136PS) - DW/2.0L
Duratorq-TDCi (103kW/140PS) - DW, Emission Requirements: Stage
IV, Removal and Installation).

Is the tip-in moan OK?
Yes

REPAIR the power steering as necessary.
REFER to:

Steering System

(211-00 Steering System - General

Information, Diagnosis and Testing).

GO to B4

B4: CHECK THE POWERTRAIN/DRIVETRAIN MOUNTS

Carry out the powertrain/drivetrain mount neutralizing procedure

Are the powertrain/drivetrain mounts OK?
Yes

Vehicle condition corrected. ROAD TEST as necessary.

INSTALL new powertrain/drivetrain mounts as necessary. ROAD TEST as

necessary.

PINPOINT TEST C : IDLE BOOM/SHAKE/VIBRATION/SHUDDER

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

C1: CHECK THE CABLE/HOSES

Check the engine compartment for any component that may have a touch
condition between the engine and body or chassis. For example: control

cable, air conditioning (A/C) hoses, acceleration cable.

Are the components OK?
Yes

GO to C2

REPAIR or INSTALL new components as necessary. ROAD TEST as
necessary.

C2: CHECK THE ENGINE COOLING RADIATOR

Check the engine cooling radiator mountings and bushings for security and
condition. Check the radiator installation for any component that may have

a touch condition.

Is the installation and bushings OK?
Yes

GO to C3

REPAIR or INSTALL new components as necessary. ROAD TEST as
necessary.

C3: CHECK THE EXHAUST SYSTEM

Carry out the exhaust system neutralizing procedure.
REFER to:

Exhaust System Neutralizing

(100-04 Noise, Vibration and

Harshness, General Procedures).

Is the exhaust system OK?
Yes

GO to C4

REPAIR as necessary. ROAD TEST as necessary.

C4: CHECK THE POWERTRAIN/DRIVETRAIN MOUNTS

Carry out the powertrain/drivetrain mount neutralizing procedure

Are the powertrain/drivetrain mounts OK?
Yes

Vehicle condition corrected. ROAD TEST as necessary.

INSTALL new powertrain/drivetrain mounts as necessary. ROAD TEST as
necessary.

PINPOINT TEST D : WHEEL END VIBRATION ANALYSIS

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

D1: INSPECT THE WHEELS AND TIRES

Inspect the wheels and tires.
REFER to:

Wheels and Tires

(204-04 Wheels and Tires, Diagnosis and

Testing).

Are the wheels and tires OK?
Yes

GO to D2

INSTALL new wheels or tires as necessary.
REFER to:

Wheel and Tire

(204-04 Wheels and Tires, Removal and

Installation).
ROAD TEST as necessary.

D2: INSPECT THE WHEEL BEARINGS

Inspect the wheel bearings.
REFER to

in this section.

Are the wheel bearings OK?
Yes

GO to D3

INSTALL new wheel bearings as necessary. REFER to:

Front Wheel Bearing

(204-01 Front Suspension, Removal and

Installation),

Wheel Knuckle

(204-02 Rear Suspension, Removal and Installation).

ROAD TEST as necessary.

D3: INSPECT THE WHEEL AND TIRE RUNOUT

Inspect the wheel and tire runout.

Is the wheel and tire runout OK?
Yes

Balance the wheels and tires. Refer to the wheel balance equipment
manufacturer's instructions. ROAD TEST as necessary.

INSTALL new wheels or tires as necessary.
REFER to:

Wheel and Tire

(204-04 Wheels and Tires, Removal and

Installation).
ROAD TEST as necessary.

PINPOINT TEST E : NON-AXLE NOISE

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

E1: INSPECT THE VEHICLE TRIM

Check the radiator grille and trim panels to see if they are the source of
the noise.

Are the vehicle trim components causing the noise?
Yes

INSTALL new trim components or REPAIR as necessary. ROAD TEST as
necessary.

GO to E2

E2: CHECK THE AIR CONDITIONING (A/C) SYSTEM FOR NOISE

Ignition switch in position III.

Ignition switch in position II.

Check the A/C system components for noise by turning the A/C system on
and off.

Is the A/C system causing the noise?
Yes

INSPECT the A/C system. REFER to: (412-00 Climate Control System -
General Information)

Climate Control System

(Diagnosis and Testing).

ROAD TEST as necessary.

GO to E3

E3: CHECK NON-FACTORY FITTED ACCESSORIES

Check any non-factory installed accessories for being the source of the
noise. For example: touch condition body-to-frame, antennas, deflectors

and fog lights.

Are the accessories the cause of the noise?
Yes

ADJUST, REPAIR, or INSTALL new accessories or fasteners as required.
ROAD TEST as necessary.

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