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
A.
Tip-in moan
Air cleaner.
Power assisted steering.
Powertrain.
Powertrain/drivetrain mounts.
Exhaust system.
GO to Pinpoint Test
B.
Idle boom/shake/vibration/shudder
Cable(s)/hose(s).
Powertrain/drivetrain mounts.
Exhaust system.
Belt/pulleys.
GO to Pinpoint Test
C.
Symptom
Possible Sources
Action
Wheel end vibration analysis
Suspension.
Wheel bearings.
GO to Pinpoint Test
D.
Non-axle noise
Trim panels.
Air conditioning (A/C) system.
Accessories.
GO to Pinpoint Test
E.
PINPOINT TEST A : SHAKE AND VIBRATION WHILE DRIVING
TEST
CONDITIONS
DETAILS/RESULTS/ACTIONS
A1: NEUTRAL COAST
Carry out the neutral coast test.
1
Does the vibration disappear during the neutral coast test?
Yes
GO to A2
.
No
GO to Pinpoint Test
D.
A2: CHECK THE POWERTRAIN/DRIVETRAIN MOUNTS
Carry out the powertrain/drivetrain mount neutralizing procedure
1
Are the mounts OK?
Yes
Vehicle condition corrected. ROAD TEST as necessary.
No
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.
1
Are the components OK?
Yes
GO to B2
.
No
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).
1
Is the exhaust system OK?
Yes
GO to B3
.
No
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).
1
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).
No
GO to B4
.
B4: CHECK THE POWERTRAIN/DRIVETRAIN MOUNTS
Carry out the powertrain/drivetrain mount neutralizing procedure
1
Are the powertrain/drivetrain mounts OK?
Yes
Vehicle condition corrected. ROAD TEST as necessary.
No
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.
1
Are the components OK?
Yes
GO to C2
.
No
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.
1
Is the installation and bushings OK?
Yes
GO to C3
.
No
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).
1
Is the exhaust system OK?
Yes
GO to C4
.
No
REPAIR as necessary. ROAD TEST as necessary.
C4: CHECK THE POWERTRAIN/DRIVETRAIN MOUNTS
Carry out the powertrain/drivetrain mount neutralizing procedure
1
Are the powertrain/drivetrain mounts OK?
Yes
Vehicle condition corrected. ROAD TEST as necessary.
No
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).
1
Are the wheels and tires OK?
Yes
GO to D2
.
No
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.
1
Are the wheel bearings OK?
Yes
GO to D3
.
No
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.
1
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.
No
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.
1
Are the vehicle trim components causing the noise?
Yes
INSTALL new trim components or REPAIR as necessary. ROAD TEST as
necessary.
No
GO to E2
.
E2: CHECK THE AIR CONDITIONING (A/C) SYSTEM FOR NOISE
Ignition switch in position III.
1
Ignition switch in position II.
2
Check the A/C system components for noise by turning the A/C system on
and off.
3
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.
No
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.
1
Are the accessories the cause of the noise?
Yes
ADJUST, REPAIR, or INSTALL new accessories or fasteners as required.
ROAD TEST as necessary.
No
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