air condition RENAULT KANGOO 1997 KC / 1.G Foult Finding - Injection User Guide

DPCF01 1.0
LUCAS DIESEL INJECTION
Fault finding - Aid
13
REPLACING THE COMPUTER
A)On these computers it is necessary to programme the load lever full load position (this value is required to
replace and adjust the load lever position potentiometer).
Programming procedure:
• Enter code G31* on the XR25 (engine speed zero)
• Press the accelerator pedal until the display flashes
"PF".
The display then shows "bon", "Fin" then "6/7.dlE" when the procedure has been carried out correctly.
Bargraph 12 RH side must be extinguished.
• Switch off the ignition.
B)Lucas digital DPC injection computers are sold pre-configured to "with air conditioning".
If the vehicle does not have air conditioning, use command G50*4* on the XR25 to programme "without
air conditioning".
Lucas digital DPC injection computers are sold pre-configured to "with power assisted steering" (with po-
wer assisted steering pump assembly).
If the vehicle does not have a power assisted steering pump assembly (vehicle without air conditioning),
use command G50*9* on the XR25 to programme "without power assisted steering".
Vehicles fitted with power assisted steering but without air conditioning must be configured to "without
power assisted steering".
REPLACING THE LOAD LEVER POSITION POTENTIOMETER
The load lever position potentiometer may only be replaced in After Sales if the full load position has been
programmed into the computer before the fault with the potentiometer.
Procedure for replacing and adjusting the load lever position potentiometer:
• Fit the new potentiometer into position without locking the mounting bolts.
• Connect the potentiometer and set up the XR25 (S8 code D34).
• Start command G32* on the XR25, keep the accelerator pedal fully depressed (do not touch the load lever
directly) and turn the potentiometer until the display on the XR25 shows a value other than H.L (outside li-
mits). Adjust the setting by turning the potentiometer to obtain 0 on the display.
• Tighten the mounting bolts with the potentiometer in this position then press * to complete the adjus-
tment procedure.
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DPCF01 1.0
LUCAS DIESEL INJECTION
Fault finding - Checking conformity
13
Order of
operationsFunction to check Action Bargraph Display and notes
1 Change to status testG01* 7. dlE
Use fiche n° 60
status test side
2 No faultsEnsure this bargraph is not
flashing, otherwise enter
G02* and turn the fiche over.
Repair the faulty component
then erase the memory (G0**)
and return to status testing
(G01*)
3 Battery voltage#04 13 volts < X < 14.5 volts
Engine warm at idle speed after at least one operation of the engine cooling fan
assembly (air conditioning not selected).NOTES
20
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DPCF01 1.0
LUCAS DIESEL INJECTION
Fault finding - Checking conformity
13
Engine warm at idle speed after at least one operation of the engine cooling fan
assembly (air conditioning not selected).NOTES
Order of
operationsFunction to check Action Bargraph Display and notes
4 Interpretation of
normally illuminated
bargraphs
-
Code present
Advance corrector fed
Illuminated if fast idle solenoid
valve is fed
Illuminated for 40 seconds at
idle speed after starting phase
Illuminated if command mode
G0** has been used since the
last dialogue took place
Illuminated for post heating
Illuminated if altimetric
corrector is fed
Illuminated if vehicle has a PAS
pump assembly
(AC version only)
Injection computer may give
load lever position to other
computers (not used)
Injection computer may give
engine speed information to
other computers (not used)1
2
2
3
4
5
6
6
11
11
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DPCF01 1.0
LUCAS DIESEL INJECTION
Fault finding - Checking conformity
13
Engine warm at idle speed after at least one operation of the engine cooling fan
assembly (air conditioning not selected).NOTES
Order of
operationsFunction to check Action Bargraph Display and notes
5 EGR solenoid valve After starting
phase for
40 seconds
#24
After
40 seconds
#24EGR solenoid valve fed
X = 82
X = 0
6Computer
configuration
With AC
Without ACG50*3*
G50*8*
G50*4*
G50*9*With AC
With PAS with pump
Without AC
With conventional PAS
3
3
18
18
19
19
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DPCF01 1.0
LUCAS DIESEL INJECTION
Fault finding - Customer complaints
13
Only consult these customer complaints after a complete check using the XR25.NOTES
No dialogue from the computer to the XR25.
Idle speed too high (when air conditioning not requested)
No fast idle when air conditioning requested
Starting fault (engine will not start or is difficult to start).
Warning light illuminates with no fault shown by the XR25.
Vehicle produces black smoke at altitude
Chart 1
Chart 2
Chart 3
Chart 4
Chart 5
Chart 6
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DPCF01 1.0
LUCAS DIESEL INJECTION
Fault finding - Fault charts
13
AFTER REPAIR
Use bornier Elé. 1332 for any operations on the computer connector.NOTES
Chart 1NO DIALOGUE FROM THE COMPUTER TO THE XR25.
Ensure that the XR25 is not the cause of the fault by trying to communicate with the computer on ano-
ther vehicle. If the XR25 is not the cause of the fault and dialogue is not established with another compu-
ter on the same vehicle, a faulty computer may be causing interference on the K and L fault finding lines.
Disconnect connections successively to determine which computer is at fault.
Check the ISO selector is on position S8, that you are using the latest XR25 cassette and the correct access
code (D34).
Check the battery voltage and carry out any necessary operations to ensure the correct voltage (U battery
> 10.5 volts).
Carry out a road test then check using the XR25.
Deal with any illuminated fault bargraphs.
Check the 15 Amp fuses on the engine connection unit have not blown (positions 3 and 4).
Check the connection and condition of the connections on the computer connector and the connection
R67 engine / dashboard.
Check the computer is correctly fed:
- Earth on track 2 of the computer connector (check the condition and tightness of the engine earth
strap and the engine earth on the gearbox housing).
- + after ignition feed on track 1 of the computer connector.
Check the diagnostic socket is correctly fed:
- Earth on track 5.
- + before ignition feed on track 16.
Check and ensure the continuity and insulation of the lines in the connection diagnostic socket/
computer:
- Between track 10 of the computer connector and track 15 of the diagnostic socket.
- Between track 13 of the computer connector and track 7 of the diagnostic socket.
If fault finding is not established after these operations, replace the computer (consult the "Aid" section
for this operation).
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DPCF01 1.0
LUCAS DIESEL INJECTION
Fault finding - Fault charts
13
Carry out a road test then check using the XR25.AFTER REPAIR
Only consult this customer complaint after a complete check using the XR25.NOTES
Chart 2IDLE SPEED TOO HIGH (WHEN AIR CONDITIONING NOT
REQUESTED)
This fault may be connected to fast idle operation.
Check the condition of the pneumatic circuit for the fast idle solenoid valve.
Look for a short circuit to + 12 volts of the connection between track 11 on the injection computer and
track 20 on the BE connector for the air conditioning computer ("AC Inj. / fast idle" information).
13-39

DPCF01 1.0
LUCAS DIESEL INJECTION
Fault finding - Fault charts
13
Carry out a road test then check using the XR25.AFTER REPAIR
NOTES
Chart 3NO FAST IDLE WHEN AIR CONDITIONING REQUESTED
Only consult this customer complaint after a complete check using the XR25.
Look for an open circuit or a short circuit to earth on the connection between track 11 on the injection
computer and track 20 on the BE connector for the air conditioning computer ("AC Inj. / fast idle" infor-
mation).
This fault causes the absence of illumination of bargraph 9 LH side "air conditioning requested".
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DPCF01 1.0
LUCAS DIESEL INJECTION
Fault finding - Fault charts
13
Carry out a road test then check using the XR25.AFTER REPAIR
If the fault persists, check the fuel supply circuits (for the pump and the injectors).
If necessary, carry out a complete check of the engine (starter drive speed, pump timing, condition of
injectors, rocker arm clearances, compression, .....).NOTES
Chart 4STARTING FAULT (ENGINE WILL NOT START OR IS DIFFICULT TO
START) (warning light extinguished).
Only consult this customer complaint after a complete check using the XR25.
If no fault is shown by the XR25, ensure that the fault is not caused by a faulty immobiliser system.
Check the operation of the preheating system:
Start command mode G10*1* and check for a voltage at the plugs.
If the plugs are not fed, check the connection of the 3 track connector on the relay unit and the condition
of the 70 Amp fuse on the engine connection unit.
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JF5111.0
INJECTION
Fault finding - Introduction
17
E7J 780
engine
DESCRIPTION OF THE FAULT-FINDING PHASES
The process described below is to be carried out in all cases of faults.
XR25 FAULT-CHECKING
This phase is the essential starting point for any intervention on the vehicle.
There are several constraints to the treatment of the bargraphs :
- A priority in the order of treatment when several bargraphs are illuminated.
- The interpretation of a bargraph depending on whether it is constantly illuminated or flashing .
1 - Order of priority
A series of illuminated bargraphs corresponding to the sensors with the same 12 V or having the same
earth, indicates a fault in this source. These priorities are dealt with in the "NOTES" section of the
fault-finding of the bargraph concerned.
2 - Input / output fault bargraphs
a) Illuminated :
The fault is present : treat the fault following the method described in the "INTERPRETATION OF XR25
BARGRAPHS" section.
b) Flashing :
Note the bargraphs displayed on the XR25.
Erase the memory of the computer and attempt to re-illuminate the bargraph: ignition on, idle speed
(or at starter speed) or by means of a road test (the "NOTES" section in the fault finding for the
bargraph concerned may help to determine the conditions under which the bargraph will illuminate).
If the bargraph has re-illuminated (fixed or flashing) :
The fault is present once again. In this case, treat the fault bargraph.
If the bargraph has not re-illuminated, check :
- the electrical lines which correspond to the flashing fault,
- the connectors of these lines (for rust, bent pins...).
- the resistance of the component found to be faulty.
- the cleanliness of the wires (insulation melted or cut, friction..).
NOTE : If the customer complaint does not correspond to the fault bargraph which is flashing
(example : Air temperature sensor fault bargraph flashing, but no customer complaint) ignore
this memorised fault and erase it.
3 - No bargraphs illuminated
If no bargraphs are illuminated on the XR25, carry out a status and parameter check. This may help in
detecting a problem.
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