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DIESEL EQUIPMENT
Pre-post-heating unit
13
FAULT FINDING
3. There is no fast idle when engine is cold (with air conditioning option)
TEST SOLUTION
Run the air conditioning.
• The fast idle operates
• The fast idle does not operate.Check the connections at the pre-post-heating unit
(connector C).
Ensure continuity between track C3 of connector (C)
and track 1 on the solenoid valve.
Replace the pre-post-heating unit (ensure the
warning light operates correctly when the ignition is
turned on).
If the fast idle solenoid valve opens the pneumatic
circuit, repair the circuit between the vacuum pump,
the solenoid valve and the diaphragm.
If the solenoid valve does not open the circuit,
measure the voltage between the 2 tracks on the
solenoid valve connector.
•12 volts
Replace the solenoid valve after testing the
connections.
•0 volt
Ensure the following continuities :
- between track 2 on the connector and earth,
- between track 1 and track C3 of the pre-post-
heating unit.
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DIESEL EQUIPMENT
Pre-post-heating unit
13
FAULT FINDING
4. Engine operation fault (difficulty in starting, idle speed unstable, noise...)
Check:
- the feed to the pre-post-heating unit :
•+before ignition at connector A.
•+after ignition on track B1 of connector C.
•earth on track C2 of connector C.
- at the pump connector, the resistance of the ALFB solenoid valve (between earth and track
A1) : 7Ω ± 0.5,
- the coherence of the temperature reading given by the coolant temperature sensor,
Temperature (°C) 25 80
Resistance (Ω) 2 610 to 2 990 310 to 350
- the adjustment and operation of the post-heating microswitch,
- the coherence of the open or closed status of the altimetric capsule switch according to the altimetric
pressure of the test site (the switch should be closed for a pressure > 925 ± 20 mbars).
If the fault persists carry out a complete re-adjustment of the pump.
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DI1306
DIESEL EQUIPMENT
Injector holder - heater plug
13
94952R1
1 + 2Injector holder assembly.
3Seal between the injector holder assembly
and the cylinder head.
4Flame arresting washer.
5Injector protector.
The injector holder assembly is screwed into the
cylinder head.
In order to remove the injector high pressure
pipes, use wrench B.Vi. 868 . To remove the
injector holder assembly, use the 27 mm long
socketMot. 997.
The following tightening torques must be
observed:
- lower section (2) on upper section (1) of the
injector holder : 7 ± 1 daN.m,
- injector holder on cylinder head: 7 ± 1 daN.m.
Each time an injector holder is removed, the
copper seal and the flame arresting washer must
be renewed.
SPECIFICATIONS
Injector holder (A)
Position of the flame arresting washer
Injector nose
To pre-combustion chamber
Heater plug (B)
Current: 15A after 8 seconds heating
Tightening torque : 2 daN.m
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DIESEL EQUIPMENT
Fuel filter
13
LOCATION
Principle of the electric heater
The heater has heated studs. They are ceramic,
made from barium titanate which has a positive
temperature coefficient, meaning that its
resistance increases as its temperature increases.
99332R
1Fuel filter
2Electric heater
3Hand priming unit
The electric diesel fuel heater and the thermostat
are integral in the head of the filter.
DIAGRAM
PRJ99258
449Electric heater
450Diesel heating relay
597Engine fuse box
645Passenger compartment fuse box Operating temperature
Electrical circuit closes: 0°C
Electrical circuit opens: from 8°C
Heater power: 150 W
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DIESEL EQUIPMENT
Coolant temperature sensor
13
LOCATION
Temperature sensor (1) (black connector)
DIAGRAM
98904RDI1307
The sensor has two functions
•Thermistor (tracks 2 and 3) :
i.e. a resistance which varies with coolant
temperature. The tracks are connected to the
pre-post-heating unit.
•Temperature switch (tracks 1 and 4) :
for operating the EGR solenoid valve.SPECIFICATIONS
Thermistor
Temperature in °C ± 1
Switch status
30closed
20open
Temperature in °C ± 1Resistance Ω
252 610 to 2 990
80310 to 350
Temperature switch
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COOLING
Filling - bleeding
19
There is no water control valve.
Coolant circulates continuously in the heater
matrix, assisting with engine cooling.
FILLING
The following bleed screws must be opened:
- on the top of the radiator,
- on the heating hose,
- on the thermostat mounting(except E7J- K7M
engines ).
Fill the circuit at the expansion bottle opening.
Close the bleed screws as soon as fluid runs out in
a continuous jet.
Start the engine (2 500 rpm).
Adjust the level by overflow for approximately
4 minutes.
Close the expansion bottle.
BLEEDING
Let the engine run for 20 minutes at
2 500 rpm,until the engine cooling fan operates
(time required for automatic degassing).
Check the fluid level is close to the "Maximum"
mark.
NEVER OPEN THE BLEED SCREWS WHEN THE
ENGINE IS RUNNING.
TIGHTEN THE EXPANSION BOTTLE CAP WHEN THE
ENGINE IS WARM.
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- the heat shield from the exhaust manifold,
- the catalytic converter (disconnect the oxygen
sensor) and secure the exhaust pipe to the
body,
- the horn,
- the acoustic tie-rod between the shock
absorber turrets,
- the air filter,
- the earth strap,
- the absolute pressure sensor,
- the expansion bottle and secure it to the
engine.
Disconnect:
- the accelerator cable as well as the kickdown
switch connector,
- the brake servo pipe,
- the relay plate and the electrical connectors
from the engine connection unit,
AUTOMATIC TRANSMISSION
Automatic transmission (Removal - Refitting)
23
K7M
ENGINE
- the connector from the automatic transmission
computer,
- the canister pipe.
Remove the battery mounting bracket.
- the heating pipes on the thermostat.
Unclip the radiator and move it away by securing
it to the engine.
98756R
Disconnect:
- the injection supply wire located in the scuttle
panel as well as the starter motor supply,
- the fuel inlet and outlet hoses using Mot. 1311-
06, unclip them from their support,
99461R
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