4A•14 Fuel and exhaust systems
16.10 Removing the manifold absolute
pressure (MAP) sensor
16.22c Removing the crankshaft position
sensor
bulkhead and remove it (see illustration). If
necessary, unscrew the mounting screws, and
separate the sensor from the mounting
bracket.
Refitting
11 Refitting is a reversal of removal.
Engine coolant temperature
sensor
Removal
12 The sensor is located on the inlet manifold
lower section. First drain the cooling system
as described in Chapter 1.
13 Remove the upper inlet manifold with
reference to Section 20.
14 Disconnect the wiring connector from the
sensor.
15 Unscrew the sensor from the lower inlet
manifold.
Refitting
16 Clean the threads, then insert the sensor
in the lower inlet manifold, and tighten
securely.
17 Refit the connector.
18 Refit the upper inlet manifold with
reference to Section 20.
19 Refill the cooling system with reference to
Chapter 1.
Crankshaft position sensor
(non-turbo engine)
Removal
20 Remove the upper and lower sections of
16.22a Crankshaft position sensor wiring
support clip (arrowed) on the left-hand end
of the engine
the inlet manifold, with reference to Sec-
tion 20.
21 Note the routing of the wiring for the
crankshaft position sensor. Disconnect the
wiring at the connector located below the inlet
manifold. Note that access is very limited.
22 Release the wiring from the plastic cable-
ties, and unscrew the support clips from the
left-hand end of the engine. Remove the
retaining screw and remove the sensor from
its location on the front left-hand side of the
cylinder block (see illustrations). Recover the
O-ring, noting how it is fitted. Clean the
seating in the cylinder block.
Refitting
23 Refitting is a reversal of removal, but
tighten the sensor to the specified torque.
Crankshaft position sensor
(turbo engine)
Removal
24 Disconnect the crankshaft position sensor
wiring plug, located below the inlet manifold.
Note that access is restricted.
25 Release the wiring from the plastic cable-
ties, then unscrew the retaining screw and
remove the sensor from its location on the
front left-hand side of the cylinder block.
Recover the O-ring, noting how it is fitted.
Clean the seating in the cylinder block.
Refitting
26 Refitting is a reversal of removal, but
tighten the sensor to the specified torque.
Throttle position sensor
(not Electronic Throttle System)
Removal
27 The throttle position sensor is located on
the throttle housing on the left-hand end of the
inlet manifold.
28 Disconnect the wiring plug from the
sensor.
29 Disconnect the large crankcase ventilation
hose from the throttle housing
30 Unscrew the retaining screws, and remove
the sensor from the housing. Remove the O-
ring from the throttle spindle. Examine the
O-ring, and obtain a new one if necessary.
16.22b Crankshaft position sensor location
Refitting
31 Refitting is a reversal of removal.
Idle air control valve
(B2O4/B234 models without turbo)
Removal
32 The idle air control valve is located
beneath the upper section of the inlet
manifold. First disconnect the battery negative
lead.
33 Disconnect the inlet hose from the throttle
housing, and disconnect the wiring plug from
the throttle position sensor.
34 Disconnect the crankcase ventilation hose
from the throttle housing, and also disconnect
the idle air control valve hose (under the
throttle housing).
35 Using hose clamps, clamp the coolant
hoses connected to the throttle housing.
Careful use of grips and suitable packing will
also achieve the same result. Loosen the clips
and disconnect the hoses from the throttle
housing.
36 Detach the accelerator cable (and where
applicable, the automatic transmission
kickdown cable).
37 Disconnect the fuel pressure regulator and
crankcase ventilation vacuum hoses from the
inlet manifold.
38 Disconnect the evaporative control
canister-purge hose from the inlet manifold,
then unscrew the outer screws from the inlet
manifold.
39 Unscrew and remove the bolts from the oil
filler pipe bracket.
40 Disconnect the manifold absolute
pressure sensor hose.
41 Remove the upper section of the inlet
manifold, then turn it over and disconnect the
wiring plug from the idle air control valve.
42 Loosen the clips and disconnect the
hoses.
43 Detach the idle air control valve from its
mounting.
Refitting
44 Refitting is a reversal of removal, but
adjust the accelerator cable (and where
applicable, the automatic transmission
kickdown cable) with reference to Section 3 of
this Chapter and Chapter 7B.