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 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.
Page 313 of 1007

ENGINE MANAGEMENT SYSTEM - SIEMENS
18-3-8 REPAIRS
Sensor - intake air temperature (IAT) -
NAS
$% 18.30.09
Remove
1.Disconnect multiplug from IAT sensor.
2.Release clip and remove IAT sensor. Discard
seal.
Refit
1.Clean IAT sensor and mating face.
2.Fit new seal to sensor.
3.Fit IAT sensor and connect multiplug.
Sensor - engine coolant temperature
(ECT)
$% 18.30.10
Remove
1.Disconnect battery earth lead.
2.Remove thermostat.
+ COOLING SYSTEM - K SERIES KV6,
REPAIRS, Thermostat.
3.Disconnect multiplug from coolant temperature
sensor.
4.Remove coolant temperature sensor and
discard sealing washer.
5.Remove coolant temperature sensor from
cylinder block.
6.Remove steel shim and sealing washer from
temperature sensor, discard sealing washer.
Refit
1.Clean coolant temperature sensor and mating
face on cylinder block.
2.Fit new sealing washer, then steel shim to
coolant temperature sensor.
3.Position coolant temperature sensor and
tighten to 17 Nm (12.5 lbf.ft).
4.Fit thermostat.
+ COOLING SYSTEM - K SERIES KV6,
REPAIRS, Thermostat.
5.Connect battery earth lead.
Page 315 of 1007

ENGINE MANAGEMENT SYSTEM - SIEMENS
18-3-10 REPAIRS
Sensor - throttle position (TP)
$% 18.30.17
Remove
1.Disconnect battery earth lead.
2.Remove acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3.Disconnect multiplug from TP sensor.
4.Remove and discard 2 Torx screws and wave
washers securing TP sensor to inlet manifold.
5.Remove TP sensor specification plate.6.Pull TP sensor from throttle spindle.
CAUTION: Do not twist or apply leverage to
throttle position sensor.
Refit
1.Clean mating faces of throttle housing and TP
sensor.
2.Fit TP sensor to throttle spindle. Ensure that
during fitting the machined flat on the throttle
spindle is aligned with the mating portion of the
TP sensor
CAUTION: The throttle position sensor can
be easily damaged during fitting. When
pressing the sensor onto the throttle
spindle, use fingers only, and only apply
pressure to the area shown shaded in the
illustration.
3.Rotate TP sensor in an anti-clockwise direction
to align fixing holes.
CAUTION: Do not rotate throttle position
sensor in a clockwise direction and ensure
that it is not rotated beyond its internal
stops.
4.Fit TP sensor specification plate.
M18 0695
Page 318 of 1007

ENGINE MANAGEMENT SYSTEM - SIEMENS
REPAIRS 18-3-13
Sensor - knock (KS)
$% 18.30.28
Remove
1.Disconnect battery earth lead.
2.Remove LH inlet manifold.
+ MANIFOLDS & EXHAUST SYSTEMS
- K SERIES KV6, REPAIRS, Gasket - inlet
manifold - LH.
3.Disconnect KS multiplug.
4.Note the routing of each KS harness.
5.Remove 2 bolts securing KS to cylinder block
and remove sensors.
Refit
1.Clean KS and mating faces on cylinder block.
2.Position KS, ensure that harnesses are
correctly routed, fit and tighten bolts to 25 Nm
(18 lbf.ft).
3.Connect KS multiplug.
4.Fit LH inlet manifold.
+ MANIFOLDS & EXHAUST SYSTEMS
- K SERIES KV6, REPAIRS, Gasket - inlet
manifold - LH.
5.Connect battery earth lead.
Switch - throttle pedal - Non NAS
$% 18.30.36
Remove
1.Remove 2 nuts securing throttle pedal
assembly to bulkhead.
2.Release clip securing throttle inner cable to
throttle pedal and disconnect inner cable from
pedal.
3.Disconnect multiplug from throttle pedal switch.
4.Remove throttle pedal assembly from vehicle.
Page 335 of 1007
FUEL DELIVERY SYSTEM - PETROL
19-2-14 REPAIRS
Sensor - heated oxygen (H02S) - front -
K1.8
$% 19.22.16
Remove
1.Release and disconnect HO2S multiplug.
2.Release HO2S harness from clip on cylinder
block.
3.Using a 22 mm crowsfoot spanner, remove
HO2S.Refit
1.Clean HO2S, sealing washer and mating faces.
2.Fit HO2S and tighten to 55 Nm (41 lbf.ft).
3.Connect HO2S multiplug and secure to support
bracket.
4.Secure HO2S harness to cylinder block clip.
Page 340 of 1007
FUEL DELIVERY SYSTEM - PETROL
REPAIRS 19-2-19
Throttle housing - KV6 - Non NAS
$% 19.22.45
Remove
1.Disconnect battery earth lead.
2.Remove engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3.Depress locking collars and release engine
breather/vacuum pipes from throttle and IACV.
4.Release throttle cable from abutment bracket
and disconnect cable from throttle body cam.5. Vehicles with cruise control: Disconnect
vacuum hose from cruise control actuator.
6.Disconnect multiplugs from primary TP sensor
and IACV.
7.Remove 4 Torx screws securing throttle body
to inlet manifold chamber, remove throttle
body.
M19 3198
Page 342 of 1007

FUEL DELIVERY SYSTEM - PETROL
REPAIRS 19-2-21
Refit
1.Clean mating faces of IACV and throttle body.
2.Fit new gasket, position IACV to throttle body,
fit and tighten Allen screws to 6 Nm (4.5 lbf.ft).
3.Clean TP sensor and throttle body mating face.
4.Fit TP sensor to throttle spindle. Ensure that
during fitting the machined flat on the throttle
spindle is aligned with the mating portion of the
TP sensor
CAUTION: The throttle position sensor can
be easily damaged during fitting. When
pressing the sensor onto the throttle
spindle, use fingers only, and only apply
pressure to the area shown shaded in the
illustration.
5.Rotate TP sensor in an anti-clockwise direction
to align fixing holes.
CAUTION: Do not rotate throttle position
sensor in a clockwise direction and ensure
that it is not rotated beyond its internal
stops.
6.Fit TP sensor specification plate.
7.Fit new Torx screws and wave washers, tighten
Torx screws to 1.5 Nm _1.0 lbf.ft).
8. Vehicles with cruise control: Position
actuator support bracket to throttle body. Fit
Torx screws and tighten to 9 Nm (7 lbf.ft).
Connect actuator arm to throttle linkage.
9.Clean throttle body and mating face on inlet
manifold chamber.
10.Fit new seal to inlet manifold chamber.
11.Position throttle body to inlet manifold chamber,
fit and tighten Torx screws to 7 Nm ( 5 lbf.ft).
12.Connect multiplugs to TP sensor and IACV.
13. Vehicles with cruise control: Connect cruise
control actuator vacuum hose.
14.Connect primary throttle cable to throttle cam
and abutment bracket.
15.Connect engine breather/vacuum pipes to
throttle body and IACV.16.Adjust throttle cable.
+ FUEL DELIVERY SYSTEM -
PETROL, ADJUSTMENTS, Throttle cable -
check and adjust - KV6.
17.Connect battery earth lead.
18.Fit engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
19.Retune using TestBook
M18 0695