Pinpoint Tests

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 operation of the system to make sure the condition is corrected.
After verifying that the condition has been corrected, make sure all components removed have been installed.

PINPOINT TEST G543314p1 : HIGH-SPEED SHAKE

G543314t1 : NEUTRAL COAST
1 Carry out the neutral coast test.
- Does the vibration disappear during the neutral coast test?

->Yes
CHECK and INSTALL new engine/transmission mounts as necessary. REPEAT Road Test as outlined.

->No
GO to Pinpoint Test G543314t9.

PINPOINT TEST G543314p2 : TIP-IN MOAN

G543314t2 : CHECK THE AIR CLEANER
1 Check the air cleaner.
- Check the air cleaner, 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 Pinpoint Test G543314t3.

->No
CORRECT the condition. REPEAT the Road Test as outlined.

G543314t3 : CHECK THE EXHAUST SYSTEM
1 Carry out the exhaust system neutralizing procedure.
- Is the exhaust system OK?

->Yes
GO to Pinpoint Test G543314t4.

->No
REPAIR as necessary. RESTORE vehicle. REPEAT the Road Test as outlined.

G543314t4 : CHECK THE POWER STEERING
1 Remove the auxiliary drive belt and test for tip-in moan.
- Is the tip-in moan OK?

->Yes
REPAIR the power steering as necessary. For additional information, refer to For additional information, refer to Power Steering

->No
CHECK and INSTALL new engine/transmission mounts as necessary. REPEAT Road Test as outlined.

PINPOINT TEST G543314p3 : IDLE BOOM/SHAKE/VIBRATION/SHUDDER

G543314t5 : CHECK CABLE/HOSES
1 Check the engine compartment for any component that may be grounding between the engine and body or chassis. Example: air conditioning (A/C) hoses.
- Are the components OK?

->Yes
GO to Pinpoint Test G543314t16.

->No
CORRECT the condition. REPEAT the Road Test as outlined.

G543314t16 : CHECK INTAKE AIR DISTRIBUTION AND FILTERING SYSTEM
1 Check the intake air distribution and filtering system for loose/damaged components (primarily upstream of the Mass Air Flow (MAF) sensor).
- Are the components OK?

->Yes

GO to Pinpoint Test G543314t6.

->No
CORRECT the condition. REPEAT the road test as outlined.

G543314t6 : CHECK THE STEERING WHEEL DAMPER
1 Remove the driver air bag module and visually inspect the steering wheel damper for correct installation or any touch condition.
- Is the damper OK?

->Yes
GO to Pinpoint Test G543314t7.

->No
CORRECT the condition. REPEAT the Road Test as outlined.

G543314t7 : CHECK THE COOLING RADIATOR
1 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.
- Are the installation and bushings OK?

->Yes
GO to Pinpoint Test G543314t8.

->No
CORRECT the condition. REPEAT the Road Test as outlined.

G543314t8 : CHECK THE EXHAUST SYSTEM
1 Carry out the exhaust system neutralizing procedure.
- Is the exhaust system OK?

->Yes
CHECK and INSTALL new engine/transmission mounts as necessary. REPEAT Road Test as outlined.

->No
REPAIR as necessary. REPEAT Road Test.

PINPOINT TEST G543314p4 : WHEEL END VIBRATION ANALYSIS

G543314t9 : INSPECT THE TIRES
1 Inspect the tires.
- Raise and support the vehicle. For additional information, refer to Lifting Description and Operation
- Inspect the tires for:
- Correct tire pressures
- Correct tire size
- Tire/wheel compatibility
- Wear or damage
- Tire beads correctly seated
- Are the tires OK?

->Yes
GO to Pinpoint Test G543314t10.

->No
REPAIR as necessary. REPEAT the Road Test as outlined.

G543314t10 : INSPECT WHEEL BEARINGS
1 Inspect the wheel bearings.
- Are the wheel bearings OK?

->Yes
GO to Pinpoint Test G543314t11.

->No
REPAIR as necessary. REPEAT the Road Test as outlined.

G543314t11 : INSPECT THE CONSTANT VELOCITY (CV) JOINT BOOTS
1 Inspect the CV joint boots.
- Inspect for evidence of cracks, tears, splits or splattered grease
- Are the CV joint boots OK?

->Yes
GO to Pinpoint Test G543314t12.

->No
REPAIR as necessary. REPEAT the Road Test as outlined.

G543314t12 : INSPECT WHEEL AND TIRE RUNOUT
1 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 manufacturers instructions.

->No
REPAIR as necessary. For additional information, refer to Wheels and Tires REPEAT the Road Test as outlined.

PINPOINT TEST G543314p5 : NON-AXLE NOISE

G543314t13 : INSPECT VEHICLE TRIM
1 Check the grille and trim mouldings to see if they are the source of the noise.
- Are the vehicle trim components causing the noise?

->Yes
INSTALL new trim or REPAIR as necessary.

->No
GO to Pinpoint Test G543314t14.

G543314t14 : CHECK THE A/C SYSTEM FOR NOISE
1 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
Diagnose the A/C system. For additional information, refer to Climate Control System Climate Control System

->No
GO to Pinpoint Test G543314t15.

G543314t15 : CHECK NON-FACTORY ACCESSORIES
1 Inspect any accessories for being the source of the noise. Example: grounding body-to-frame, antennas, visors, bug deflectors and fog lights.
- Are the accessories the cause of the noise?

->Yes
ADJUST, REPAIR or INSTALL new accessories or fasteners as required.

->No
Verify the customer concern