23 · Diagnostics

Steering hard / (in one direction only)

Make: Alfa Romeo
Model: 159 Factory Service Manual
Year: 2005–2011
Section: Steering – vehicle behaviour › Steering hard / (in one direction only)

‹ Prev Steering hard / (steering in both directions)Next › Steering wheel oscillations / vibrations / whilst driving

Fault diagnosisSteering hard / (in one direction only)

STEERING HARD / (IN ONE DIRECTION ONLY)

When the steering is operated normally there is a hardening of the steering action to the right or the left

0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Carry out a test steering fully in various conditions to check the actual onset of the hardening in one direction only. Visually inspect the power assisted steering fluid level in the reservoir.	Move on to Step 1	1. Hardening in both directions	1. Proceed as instructed in the See table H010 STEERING HARD / (STEERING IN BOTH DIRECTIONS)
		Move on to Step 1	2. Power assisted steering fluid level too low.	2. Top up to the correct level, if there are leaks, continue as instructed in the See table X030 POWER ASSISTED STEERING SYSTEM FLUID LEAKS
1	STEERING RODS AND ARMS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the condition of the steering rods and arms	Move on to Step 2	1. Rods damaged or worn.	1. Replace the rods Op. 4110B10 STEERING LINKS - R+R ON VEHICLE - CHECK TOE-IN/TOE-OUT SEPARATELY
	Check the condition of the steering rods and arms	Move on to Step 2	2. Arms damaged or worn.	2. Replace the steering box Op. 4120A10
2	RACK AND PINION CLEARANCE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the rack and pinion clearance with the steering column detached and the wheels straight.	Move on to Step 3	Rack and pinion clearance too large.	Replace the steering box Op. 4120A10
3	CHECK ON CORRECT TENSION OF DRIVE BELT AND CORRECT OPERATION OF POWER ASSISTED STEERING PUMP	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the tension of the power assisted steering pump drive belt is correct and that it is not worn. Also check that the power assisted steering pump is working properly.	Move on to Step 4	1. Belt not correctly tensioned.	1. Restore correct belt tension Op. 1092C12
			2. Belt worn.	2. Replace the belt Op. 1092C11
			3. Power assisted steering pump malfunction.	3. Replace the power assisted steering pump Op. 4130B24
4	STEERING WHEEL RETURN CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Refit all the components removed. Test the vehicle and check that the steering wheel returns correctly.	End of diagnosis	Poor steering wheel return.	Restore the correct front wheel geometry Op. 4450A10 FRONT WHEEL GEOMETRY - CHECK USING OPTICAL EQUIPMENT - INCLUDES ADJUSTMENT IF NECESSARY

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Parts & tools for this job Staging For 2005 Alfa Romeo 159

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