Discovery 2. Manual — part 156

AUTOMATIC GEARBOX - ZF4HP22 - 24

REPAIRS

44-55

Lock-up solenoid valve (MV 3)

$% 44.15.35

Remove

1. Remove valve body assembly.

+

AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Valve body assembly.

2. Disconnect multiplug from lock-up solenoid

valve and release harness from clip.

3. Remove Torx screw and retaining fork securing

solenoid valve to valve body.

4. Remove solenoid valve from valve body.

Refit

1. Clean lock-up solenoid valve with lint free cloth.
2. Position solenoid valve in valve body.
3. Position retaining fork, fit and tighten Torx

screw to 8 Nm (6 lbf.ft).

4. Connect multiplug to lock-up solenoid valve

and secure harness in clip.

5. Fit valve body assembly.

+

AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Valve body assembly.

M44 1354A

2

3

4

AUTOMATIC GEARBOX - ZF4HP22 - 24

44-56

REPAIRS

Solenoids - shift control valves
(MV 1 & 2)

$% 44.15.45

Remove

1. Remove valve body assembly.

+

AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Valve body assembly.

2. Remove 3 Torx screws securing lock-up

solenoid valve assembly to valve body and
move solenoid aside.

NOTE: This is to gain access to remove Torx
screw and MV2 shift control valve.

3. Note their fitted position and disconnect

multiplugs from shift control valves MV 1 and
MV 2.

4. Remove Torx screw and retaining fork securing

MV2 shift control solenoid valve to valve body.
Note that the tag on the retaining fork faces
towards the valve body.

5. Remove shift control valve from valve body.

Refit

1. Clean MV2 shift control solenoid valve with lint

free cloth.

2. Position MV2 shift control solenoid valve to

valve body.

3. Position retaining fork, fit Torx screw and

tighten to 8 Nm (6 lbf.ft).

4. Connect multiplugs to both shift control

solenoid valves.

5. Clean lock-up solenoid valve assembly with a

lint-free cloth.

6. Position lock-up valve assembly, fit and tighten

Torx screws to 8 Nm (6 lbf.ft).

7. Fit valve body assembly.

+

AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Valve body assembly.

M44 1352

1

M44 1353A

AUTOMATIC GEARBOX - ZF4HP22 - 24

REPAIRS

44-57

Harness - solenoid valves

$% 44.15.52

Remove

1. Remove valve body assembly.

+

AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Valve body assembly.

2. Release and remove clip securing pressure

regulator solenoid harness to valve body.

3. Disconnect multiplug from pressure regulator

solenoid valve.

4. Disconnect multiplugs from lock-up solenoid

valve, shift control solenoid valves MV 1 and
MV 2.

5. Release harness from 5 clips on valve body

and remove harness.

6. Disconnect and remove speed sensor from

harness.

Refit

1. Connect speed sensor to harness multiplug.
2. Position harness to valve body.
3. Connect multiplugs to shift control solenoid

valves MV 1 and MV 2 and lock-up solenoid
valve.

4. Connect multiplug to pressure regulator

solenoid valve and secure solenoid valve
harness with clip to valve body.

5. Position and secure harness in clips on valve

body.

6. Fit valve body assembly.

+

AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Valve body assembly.

M44 1350

M44 1355

M44 1359

AUTOMATIC GEARBOX - ZF4HP22 - 24

44-58

REPAIRS

Electronic control unit - automatic
transmission

$% 44.15.46

Remove

1. Release fixings and remove battery cover.
2. Disconnect battery earth lead.

3. Remove 3 screws and trim clip securing lower

trim casing to LH front seat.

4. Remove 3 nuts securing speaker power

amplifier bracket to the body.

5. Disconnect multiplug from automatic

transmission ECU located on underside of
amplifier mounting bracket.

6. Remove 2 nuts securing ECU to mounting

bracket and remove ECU.

Refit

1. Position ECU to mounting bracket and secure

with nuts.

2. Connect multiplug to ECU.
3. Position speaker power amplifier mounting

bracket to body and secure with nuts.

4. Position lower trim casing to seat and secure

with screws and trim clip.

5. Connect battery earth lead.
6. Fit battery cover and secure fixings.