Discovery 2. Manual — part 65
EMISSION CONTROL - V8
REPAIRS 17-2-55
Solenoid - evap canister vent solenoid
(CVS) valve
$% 17.15.47
Remove
1. Disconnect multiplug from CVS unit.
2. Remove clip and disconnect hose from vent
valve.
CAUTION: Always fit plugs to open
connections to prevent contamination.
3. Remove CVS unit from bracket.
Refit
1. Fit CVS unit to bracket.
2. Connect hose to vent valve and secure with
clip.
3. Connect multiplug to CVS unit.
EMISSION CONTROL - V8
17-2-56 REPAIRS
Sensor - heated oxygen (HO
2
S) - pre-
catalytic converter
$% 19.22.16
Remove
1. Raise vehicle on a ramp.
2. Release HO
2
S multiplug from support bracket.
3. Release HO
2
S harness from clip and
disconnect multiplug from HO
2
S .
4. Using a 22 mm crow's-foot spanner, remove
HO
2
S.
CAUTION: HO
2
sensors are easily damaged
by dropping, excessive heat or
contamination. Care must be taken not to
damage the sensor housing or tip.
Refit
1. Clean sensor and exhaust pipe mating
surfaces.
2. If refitting existing sensor, apply anti-seize
compound to sensor threads.
WARNING: Some types of anti-seize
compound used in service are a health
hazard. Avoid skin contact.
NOTE: A new HO
2
sensor is supplied pre-
treated with anti-seize compound.
3. Fit a new sealing washer to HO
2
S
4. Fit HO
2
S and tighten to 45 Nm (33 lbf.ft).
5. Connect multiplug to HO
2
S, and secure to
support bracket and harness clip.
6. Lower vehicle.
EMISSION CONTROL - V8
REPAIRS 17-2-57
Sensor - heated oxygen (HO
2
S) - post-
catalytic converter
$% 19.22.17
Remove
1. Raise vehicle on ramp.
2. Release HO
2
S multiplug from support bracket.
3. Disconnect HO
2
S multiplug from harness.
4. Using a 22 mm crowsfoot spanner, remove
HO
2
S.
CAUTION: HO2 sensors are easily damaged
by dropping, excessive heat or
contamination. Care must be taken not to
damage the sensor housing or tip.
Refit
1. Clean sensor and exhaust pipe mating
surfaces.
2. If refitting existing sensor, apply anti-seize
compound to sensor threads.
WARNING: Some types of anti-seize
compound used in service are a health
hazard. Avoid skin contact.
NOTE: A new HO2 sensor is supplied pre-
treated with anti-seize compound.
3. Fit a new sealing washer to HO
2
S
4. Fit HO
2
S and tighten to 45 Nm (33 lbf.ft).
5. Connect HO
2
S multiplug to harness and fit
harness to bracket.
6. Secure harness to clip.
7. Lower vehicle.
EMISSION CONTROL - V8
17-2-58 REPAIRS
Control Valve - Secondary Air Injection
(SAI)
$% 17.25.02
Remove
1. Release clip and disconnect air hose from
valve.
2. Disconnect vacuum hose from valve.
3. Remove 2 bolts securing valve to air manifold.
4. Remove valve and discard gasket.
Do not allow dirt or debis to enter the air
manifold.
Refit
1. Clean SAI control valve and mating face on
manifold.
2. Fit new gasket and fit valve. Tighten bolts to 10
Nm (7 lbf.ft).
3. Connect vacuum hose.
4. Connect air hose and secure with clip.
Reservoir - Vacuum - Secondary Air
Injection (SAI) - up to 03MY
$% 17.25.04
Remove
1. Disconnect 2 vacuum hoses from reservoir.
2. Remove bolt securing reservoir to mounting
bracket and collect reservoir.
Refit
1. Position reservoir to mounting bracket and
tighten bolt to 10 Nm.
2. Connect vacuum hoses to reservoir.
M17 0222
1
2
3
4
M17 0227
2
1
1
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