Vauxhall Workshop Service and Repair Manuals

Note:   With the introduction of the second generation of electro-hydraulic power steering, there is now only one supplier. This new version can be diagnosed using Tech 2. Further information on the diagnosis of the electro-hydraulic power steering using Tech 2 – see in the corresponding Checking Procedure.

The round fluid reservoir of the EHPS Gen. II has a different appearance to the fluid reservoir of the first generation (I) from TRW in that it has a larger circumference and a bayonet catch instead of the screw lock.

No filling level marks are provided on the fluid reservoir. The dipstick (1) on the reservoir lid has a "MAX" filling level mark.

Remove front axle body – see operation "Front Axle Body, Remove and Install" in group "E".

Remove return (1) and pressure line (2) from electro-hydraulic supply unit – fluid escapes, place collecting basin underneath.

For vehicles with LHD: Remove front steering gear line (1) from steering gear. Release steering wiring harness (2) from front axle body – note cable routing.

Remove fastening nuts (3 and 4) from engine steering gear and front axle body. Remove electro-hydraulic supply unit with bracket and wiring harness. Remove steering from front axle body.

Note:   When replacing the electro-hydraulic supply unit, the heat shield must be transferred, if necessary.

Position electro-hydraulic supply unit with bracket on steering gear and front axle body – note steering wiring harness.

Attach bracket for electro-hydraulic supply unit (1) to front axle body with fastening nuts (3) – tightening torque 22 Nm / 16 lbf. ft. Attach bracket for electro-hydraulic supply unit to steering gear with fastening nut (2) – tightening torque 22 Nm / 16 lbf. ft.

For vehicles with LHD: Route steering wiring harness (5) and attach to front axle body – ensure correct cable routing. Attach front steering gear line (4) with new seal rings to steering gear – tightening torque 30 Nm / 22 lbf. ft.

Attach pressure line (1) with new seal ring to electro-hydraulic supply unit – tightening torque 30 Nm / 22 lbf. ft.

Attach return line to fluid reservoir with new retaining strap and KM-J-22610 (2).

Remove cover from fluid reservoir. Remove fluid screen from fluid reservoir and check for contamination; clean thoroughly if necessary. Insert fluid screen into fluid reservoir.

Top up special fluid in fluid reservoir until "MAX" (1) mark on the dipstick has been reached. Place lid on fluid reservoir and seal off.

Install front axle body – see operation "Front Axle Body, Remove and Install" in group "E".

Note:   In vehicles up to MY 03, attachment of the steering wiring harness no longer takes place on the front frame after replacement of the electro-hydraulic supply unit, but with a cable tie to the ABS bracket (see magnifying glass in Figure I). Figure II shows attachment of the steering wiring harness in vehicles from MY 03.