Peugeot 205 - Manual (Page 121)

19 Do not attempt to adjust the throttle
switch setting or that of the stop screw on the
throttle valve external linkage; if the accurately
matched relationship between these
components is lost, the components must be
replaced. At the time of writing this means
renewing the entire throttle body assembly.
Throttle body
Note: Refer to the warning note in Section 1
before proceeding.
20 Disconnect the battery negative lead.
21 Remove the air inlet trunking from the top
of the throttle body.
22 Disconnect the throttle cable (see Sect-
ion 3).
23 Release the securing clips, and
disconnect the wiring plugs from the fuel
injector, the idle speed control motor, and the
throttle switch (see illustrations).
24 Disconnect the fuel hoses from the unions
on the throttle body (refer to Section 4). Plug
the open ends of the hoses, to prevent dirt
ingress and further fuel loss. Take note of the
connections, and label them to ensure correct
refitting.
25 Disconnect the vacuum hoses and pipes
from the throttle body unions (see
illustration). Label the hoses and pipes so
that they can be correctly reconnected on
refitting.
26 Remove the screws securing the throttle
body to the inlet manifold, then withdraw the
assembly (see illustration). Recover the
gasket, and discard it.
27 If desired, the throttle body upper and
lower sections may be separated by removing
the securing screws. Note that a new gasket
must be fitted on reassembly. As noted
previously, do not disturb the throttle switch.
The fuel inlet and return unions may be
unscrewed from the throttle body, and the
vacuum hose unions may be detached, but
note that new sealing rings must be fitted on
reassembly.
28 Refitting is the reverse of the removal
procedure, noting the following points.
a) Renew all gaskets and seals, and use
suitable thread-locking compound where
applicable.
b) Check the throttle cable operation and
adjustment (Section 3).
c) Ensure that all vacuum hoses and pipes
are correctly reconnected, as noted
before removal.
d) Ensure that the fuel hoses are correctly
reconnected. The direction of fuel flow is
indicated by arrows cast into the throttle
body next to each union.
e) On completion, switch on the ignition,
and check for signs of fuel leaks from all
disturbed unions. If any signs of leakage
are detected, the problem must be
rectified before the engine is started.
Coolant temperature sensor
Refer to Chapter 3, Section 7.
Electronic control unit (ECU)
29 The ECU is located behind the facia, to
the right of the steering column.
30 Disconnect the battery negative lead.
31 For improved access, remove the driver’s
side lower facia panel. The panel is secured
by four screws, and a single bolt.
32 Remove the nuts securing the ECU
bracket to the facia, then lower the assembly.
Withdraw the ECU from the bracket (see
illustration).
33 Release the securing clip, or remove the
securing screws, as applicable, and
disconnect the wiring plug (see illustration).
34 Refitting is a reversal of removal, but
ensure that the wiring plug is securely
reconnected, and where applicable, ensure
that the ECU locates correctly in the bracket.
Fuel injection system fuses and
relays
35 The relays are generally mounted on the
left-hand side of the engine compartment
bulkhead. The relays may be mounted on
individual brackets, or on later models, in a
plastic box.
36 Most of the fuses are located in the main
fusebox inside the car, although on certain
models, additional fuses may be located in a
small fusebox mounted at the front left-hand
corner of the engine compartment.
37 The number and type of fuses and relays
fitted will depend on engine type and exact
vehicle specification.
Fuel system - single-point fuel injection engines 4B•5
4B
11.23a Disconnecting the wiring plug from
the fuel injector . . .
11.23b . . . and the throttle switch 11.25 Vacuum hose connection to throttle
body (arrowed)
11.26 Throttle body securing screws
(arrowed)
11.32 Removing the ECU from its bracket.
Note securing lug (arrowed)
11.33 Disconnecting the ECU wiring plug