Page 304 of 1007

EMISSION CONTROL
REPAIRS 17-1-13
8.Remove 2 bolts and remove RH heat shield.
9.Release post catalyst HO2S harness from
clips.
10.Release and disconnect post catalyst HO2S
multiplug.
11.Remove 2 bolts securing pipe clamp and
remove clamp.12.Remove 2 nuts securing catalyst, remove
catalyst and discard gasket.
NOTE: Do not carry out further dismantling if
component is removed for access only.
13.Identify and remove both H02S from catalyst.
Refit
1.Clean H02S and mating faces.
2.Fit both H02S and tighten to 55 Nm (40 lbf.ft).
3.Clean catalyst and mating face.
4.Using a new gasket, fit catalyst and fit nuts but
do not tighten at this stage.
5.Fit clamp, fit bolts but do not tighten at this
stage.
6.Connect post catalyst H02S multiplug and fit to
bracket.
7.Fit harness into clips.
8.Fit heat shields and tighten bolts to 10 Nm (7
lbf.ft).
9.Fit intermediate pipe and silencer.
+ MANIFOLDS & EXHAUST SYSTEMS
- K SERIES KV6, REPAIRS, Intermediate
pipe - NAS.
10.Tighten nuts securing catalyst to manifold to 50
Nm (37 lbf.ft).
11.Tighten bolts securing clamp to 10 Nm (7 lbf.ft).
12.Connect pre catalyst H02S multiplug and fit to
bracket.
13.Fit harness into clips.
14.Fit acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
15.Connect battery earth lead.
M19 3482
Page 306 of 1007

ENGINE MANAGEMENT SYSTEM - SIEMENS
REPAIRS 18-3-1
ENGIN E MANAGEMENT SY STEM - SIEMENS REPAIRS
Spark plugs - up to 03MY
$% 18.20.02
Remove
1.Disconnect battery earth lead.
2.Remove engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3. RH bank only: Release locking clips and
disconnect multiplugs from plug top coils.
4. RH bank only: Remove 6 bolts securing plug
top coils to RH camshaft cover and remove
coils.
5. LH bank only: Noting their fitted positions,
disconnect ht leads.
6.Using a 16 mm plug socket, remove spark
plugs from both cylinder heads.Refit
1.Set gap of each new spark plug to 1.00 mm.
2.Fit spark plugs and tighten to 25 Nm (18 lbf.ft).
3. LH bank only: Connect ht leads.
4. RH bank only: Fit plug top coils to spark plugs.
5. RH bank only: Fit bolts securing plug top coils
to RH camshaft cover and tighten to 9 Nm (6.5
lbf.ft).
6. RH bank only: Connect multiplugs to plug top
coils and secure with locking clips.
7.Fit engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
8.Connect battery earth lead.
Page 307 of 1007
ENGINE MANAGEMENT SYSTEM - SIEMENS
18-3-2 REPAIRS
Spark plugs - from 03MY
$% 18.20.02
Remove
1.Disconnect battery earth lead.
2.Remove the engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3.Release locking clips and disconnect
multiplugs from plug top coils.
4.Remove 6 bolts securing plug top coils to
cylinder heads.
5.Pull to release and remove 6 plug top coils from
cylinder heads.
6.Using a 16 mm plug socket, remove spark
plugs from cylinder heads.Refit
1.Check and if necessary set spark plug gap.
+ GENERAL DATA, Engine - KV6
Petrol.
2.Fit spark plugs and tighten to 25 Nm (18 lbf.ft).
3.Apply a rubber lubricant to plug top coil lower
seals and fit coils fully into cylinder heads.
4.Fit bolts securing plug top coils and tighten to
10 Nm (7 lbf.ft).
5.Connect and secure multiplugs to plug top
coils.
6.Fit the engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
7.Connect battery earth lead.
Page 308 of 1007

ENGINE MANAGEMENT SYSTEM - SIEMENS
REPAIRS 18-3-3
Coil - each - LH bank - up to 03MY
$% 18.20.46
Remove
1.Disconnect battery earth lead.
2.Remove engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3.Release ht lead from plug top coil.
4.Release locking clip and disconnect multiplug
from plug top coil.
5.Remove nut, release earth lead, remove bolt
securing plug top coil to LH inlet manifold and
remove coil.
Refit
1.Fit plug top coil to LH inlet manifold, position
earth lead, fit and tighten nut and bolt to 9 Nm
(6.5 lbf.ft).
2.Connect multiplug to plug top coil and secure
with locking clip.
3.Connect ht lead to plug top coil.
4.Fit engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
5.Connect battery earth lead.
Coil - each - LH bank - from 03MY
$% 18.20.46
Remove
1.Disconnect battery earth lead.
2.Remove the engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3.Withdraw multiplug lock, release and
disconnect plug top coil multiplug.
4.Remove bolt securing plug top coil to camshaft
rocker cover.
5.Remove plug top coil from camshaft rocker
cover.
Refit
1.Apply a rubber lubricant to plug top coil, lower
seal.
2.Fit plug top coil to camshaft rocker cover, fit bolt
and tighten to 5 Nm (3.7 lbf.ft).
3.Fit and secure plug top coil multiplug.
4.Fit the engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
5.Connect the battery earth lead.
Page 309 of 1007

ENGINE MANAGEMENT SYSTEM - SIEMENS
18-3-4 REPAIRS
Coil - each - RH bank - up to 03MY
$% 18.20.47
Remove
1.Disconnect battery earth lead.
2.Remove engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3.Release locking clip and disconnect multiplug
from plug top coil.
4.Remove 2 bolts securing plug top coil to RH
camshaft cover.
5.Release and remove plug top coil from spark
plug.
Refit
1.Position and fit plug top coil to spark plug.
2.Fit bolts securing plug top coil to RH camshaft
cover and tighten to 9 Nm (6.5 lbf.ft).
3.Connect multiplug to plug top coil and secure
with locking clip.
4.Fit engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
5.Connect battery earth lead.
Coil - each - RH bank - from 03MY
$% 18.20.47
Remove
1.Disconnect battery earth lead.
2.Remove the engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3.Withdraw multiplug lock, release and
disconnect plug top coil multiplug.
4.Remove bolt securing plug top coil to camshaft
rocker cover.
5.Remove plug top coil from camshaft rocker
cover.
Refit
1.Apply a rubber lubricant to plug top coil, lower
seal.
2.Fit plug top coil to camshaft rocker cover, fit bolt
and tighten to 5 Nm (3.7 lbf.ft).
3.Fit and secure plug top coil multiplug.
4.Fit the engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
5.Connect the battery earth lead.
Page 310 of 1007
ENGINE MANAGEMENT SYSTEM - SIEMENS
REPAIRS 18-3-5
Engine control module (ECM) - Non NAS
$% 18.30.01
Remove
1.Disconnect battery earth lead.
2.Remove 5 Allen screws securing cover to 'E'
box and remove cover.
3.Release latch and disconnect multiplug from
ECM.4.Remove ECM from 'E' box.
Refit
1.Fit ECM into 'E' box.
2.Position and connect multiplug to ECM and
secure latch.
3.Fit 'E' box cover and tighten Allen screws to 2
Nm (1.5 lbf.ft).
4.Connect battery earth lead.
M18 0672
Page 311 of 1007
ENGINE MANAGEMENT SYSTEM - SIEMENS
18-3-6 REPAIRS
Engine control module (ECM) - fuel - NAS
$% 18.30.03
Remove
1.Disconnect battery earth lead.
2.Remove 5 Allen screws and 'E' box cover.
3.Disconnect 5 multiplugs from engine ECM.4.Release 2 clips and remove ECM.
Refit
1.Fit ECM and connect multiplugs.
2.Fit 'E' box cover and tighten Allen screws to 2
Nm (1.5 lbf.ft).
3.Connect battery earth lead.
4.Initiate ECM using TestBook/T4.
CAUTION: The ECM can only be re-
programmed a maximum of 20 times.
M18 0665
Page 312 of 1007
ENGINE MANAGEMENT SYSTEM - SIEMENS
REPAIRS 18-3-7
Idle Air Control Valve (IACV)
$% 18.30.05
Remove
1.Disconnect battery earth lead.
2.Remove engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3.Disconnect multiplug from IACV.
4.Depress locking collar and release vacuum
hose from IACV housing.
5.Remove 2 Allen bolts securing IACV to throttle
body.
6.Remove IACV and discard gasket.Refit
1.Clean mating faces of IACV and throttle body.
2.Fit new gasket to IACV.
3.Position IACV to throttle body, fit and tighten
Allen bolts.
4.Connect vacuum hose to IACV.
5.Connect multiplug to IACV.
6.Fit engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
7.Connect battery earth lead.