
IGNITION AND  INJECTION
17
17 - 32
DF014
P RESENT
OR
ME MO RIZEDCANISTER PURGING VALVE CIRCUIT
1.DEF : Open circuit or short-circuit
CO :  Open circuit
CC.O : S hot circuit at mass
CC. 1 : Short circuit at + 12 V.
RECO MMENDATIONS
Conditions for diagnostic appl ication for memorized failure:
Se t the contact on or launch commend  “AC016: Canister Purging Valve”
In ca se of failures additi on, treat as most important  failure  “DF009 actuators
relay control circuit ”.
 * If the failure is memorized with OBD indicator on, check in the context part,
if  state “ET117  : Canister purging control” corresponding to the OBD i ndicator
lighting request is affirma tive. In this case, proceed as per bellow mentioned
met hod.
C heck   the connection and the connector state of the can ister purging valve .
C hange the connector    if  necessary.
C heck the  resistance of the canister purging valve.
Repl ace  the canister purging valve if is necessary.
C heck with the contact on, the presence  of +12 Volts at pin 1 of the purging valve .
Fi x if  necessary.
C onnect the 90 ways terminal box instead of the injection computer the n check the  in s u la t ion and
the continuity of the l ine:
 Pin 4 injection computer    > pin 2 canister purging valve
Fix  if necessary
Repl ace the canister purging valve if necessary.
If the problem is persisting after these  checking, fix the other failures then perform the conformity
checking.
    AFT ER
REPARATION Pe
rform the operations from “recommendations” for reparation confirmation.
Fi x any other possible failures.
Erase  the failures memoriz ed by the injection computer.
Pe rform a conformity checking by means of the CLIP tester.
Diagnostic – Failures interpretation
vnx.su  

IGNITION AND  INJECTION
17
17 - 34
UPSTREAM OXYGEN SENSOR HEATING  CIRCUIT
1DEF : Open circuit or short-circuit
CO  : open circuit
CC.O : s hot circuit at mass
CC.1 : s hort circuit at + 12 V.
  
DF018
P RESENT
OR
  MEMO RIZED
Conditions for diagnostic appl ication for memorized failure :
- Start the engine and ensure that state “ AC261: Upstream O2  sensor
heating” is ACTIVE.
- Or act upon the actua tor control “ AC261: upstream 02 sensor heating ”.
In case of failures addition, treat as most important failure  “DF009 actuators
relay control circuit” .
* If the failure is memorized with OBD indicator on, check in the context part,
if  state “ET117 : Cani ster purging control” corresponding to the OBD i nd icator
lighting request is affirmative. In this case, proceed as per bellow mentioned
met hod.
RECOMMENDATIONS
Perform the operations from “recommendations” for reparation confirmation.
Fi x any other possible failures.
Erase  the failures memoriz ed by the injection computer.
Pe rform a conformity checking by means of the CLIP tester.
AF
TER
REPARATION
Diagnostic – Failures interpretation
C heck  the connection and the connector state  of the oxygen sensor.
C hange the connector    if  necessary.
C heck  the heating resistance of the oxygen sensor. Refer to chapter ” Help” for res istance values .
Repl ace the sensor if necessary.
C heck  the presence of +12 Volts on A way of the oxygen s ensor.
Fi x the electric  connection between A way oxygen sensor and the actuators relay.
C onnect the 90 ways terminal box instead of the injection computer then  check the insulati on, the
continuity and the abse nce of the parasite resistance on line: :
Pin 63 injection computer      >  pin B oxygen sensor
Fi x if  necessary.
 If the problem is persisting after these  checking, fix the other failures then perform the conformity
checking.
vnx.su  

IGNITION AND  INJECTION
17
17 - 39
DF 045
P RESENT
OR
ME MO RIZEDATMOSPHERIC PRESSURE SENSOR CIRCUIT
1 . DEF : Open circuit or short-circuit
2   DEF  : Pressure evolution in manifold
P erform the operations from ” recommendations” for reparation confir mation
Fix a ny other possible failures
Erase  the failures memoriz ed by the injection computer.
Perform a conformity checking by means of the CLIP tester.
AF TER
REPARATION
If failure is present only when engine is running, check with the contact set on, the valve
position parameter coherence for: release acceleration pedal and maximum presse d pedal.
Easy push the accele ration pedal (from release d pedal t ill maximum acceleration) and check that
valve position is regularly increasing.
If a.m. are not observed, the inf ormation is not conform. In such case , treat the diagnostic of this
parameter.
C heck the  connector condition of the atmospheric pressure se nsor.
R eplace the connector  if necessary.
C heck tha t pressure se nsor is correctly connected from pneuma tic point of view.
C heck the  pressure sensor resistance. Refer to chapter “Help” in order to compa re the values of
th e measured resistance with the recommended ones.
R eplace the pressure sensor if necessa ry.
C onnect the 90 ways terminal box instead of the injection computer then check the  insulation,
continuity and absence of the parasite resistance on lines: Pin 16 injection computer      >  pin B atmospheric pressure sensor
Pin 15 injection computer      >  pin  A atmospheric pressure sensor
Pin 78 injection computer      >  pin  C atmospheric pressure sensor
Fi x if  necessary.
If the problem is not solved, use the recommended me thod for DF345 failure.
RE CO MMENDATIONS
 If failure “DF345”: Supply 5 volts potentiometers or sensors” is prese nt or
memorize d, this must be treated as most important.
C onditions for diagnostic application to memorized failure:
Set t he contact off and wait until the communication CLIP tester-computer
is  lost. Set the contact on again, and then enter in dialog with the computer.
If it is necessa ry, start the engine and accelerate to over 608 rot/min for a
period of minimum 10 seconds.
* If the failure is memorized with OBD indicator on, check in the  context
part, if state “ET277 : Atmospheric pressur e sensor circuit” corresponding
to  the OBD indicator lighting request is affirmative. In this case, proceed as
per bellow mentioned method
Diagnostic – Failures interpretation
vnx.su  

IGNITION AND  INJECTION
17
17 - 40
DF 052
P RESENT
OR
ME MO RIZED
Perform the operations from ” recommendations” for reparation confir mation
Fix a ny other possible failures
Erase  the failures memoriz ed by the injection computer.
Perform a conformity checking by means of the CLIP tester.
AF TER
REPARATION
C heck the connection and condition of the  injector 1 connector.
R eplace the connector  if necessary.
C heck the  injector resistance. Refer to chapte r “Help”  in order to compare the resistance values.
R eplace the injector if necessary.
When setting the contact on, check the  presence of supplying +12 V on pin 1 of the  injector  1.
Fix, if necessary the electric routing up to actua tors relay.
C onnect the 90 ways terminal box instead of the  injection computer the n check the  insulation and
continuity  on line:
pi n 59 injection computer     > pin 2 injector 1
Fix if  necessary.
If after these checking the problem is persisting, treat the other failures then perform the conformity
checking
RE COM M E ND AT IONS
Conditions for diagnostic appl
ication to memorized failure:
Start the engine and  especially stop it immediately the failure is becoming
pres ent, so t hat catalyst-dama ging risk is avoide d.
 In case of failures addition, treat as most important, fai lure “ DF009 act uators
relay control circuit”
* If the failure is memorized with OBD indicator on, check in the  conte xt
part, if state “ET278 :  Cylinder injector circuit” corresponding to the OBD
i ndicator lighting request is affirmative. In this case, proceed as per bellow
m entioned method.
Diagnostic – Failures interpretation
CYLINDER 1 INJECTOR CIRCUIT
1.  DEF Open circuit or short-circuit
CO  : open circuit
CC.O  : shot circuit at mass
CC.1  : short circuit at + 12 V.
vnx.su  

IGNITION AND  INJECTION
17
17 - 41
Perform the operations from ” recommendations” for reparation confirmation.
Fix any other possible failures.
Erase  the failures memoriz ed by the injection computer.
Pe rform a conformity checking by means of the CLIP tester.
AF
TER
REPARATION
DF 053
P RESENT
OR
ME MO RIZED
Check the connection and condition of the  injector 2 connector.
R eplace the connector  if necessary.
C heck the  injector 2 resistance. Refer to chapte r “Help”  in order to compare the resistance values.
R eplace the injector if necessary.
When setting the contact on, check the  presence of supplying +12 V on pin 1 of the  injector  2.
Fix, if necessary the electric routing up to actua tors relay.
C onnect the 90 ways terminal box instead of the injection computer then check the  in s u la t ion and
continuity on line :
 pin 90 injection computer     >  pin 2 injector 2
Fi x if  necessary.
If after these  checking the  problem is persisting, treat the other failures then perform the
conformity checking.
RE CO MMENDATIONS
Conditions for diagnostic appl ication to memorized failure:
St art the engine and  especially stop it immediately the failure is becoming
pres ent, so th at catalyst-dama ging risk is avoide d.
 In case of failures addition, treat as most important, failure “ DF009 act uators
relay control circuit”
* If the failure is memorized with OBD indicator on, check in the context part,
if  state  “ET279 :  Cylinder 2  injector  circuit” corresponding to the  OBD
i ndicator lighting request is affirma tive. In this case, proceed as per bellow
m entioned method
Diagnostic – Failures interpretation
CYLINDER 2 INJECTOR CIRCUIT
1.  DEF : Open circuit or short-circuit
CO  : open circuit
CC.O  : shot circuit at mass
CC.1  : short circuit at + 12 V.
vnx.su  

IGNITION AND  INJECTION
17
17 - 42
DF 054
P RESENT
OR
ME MO RIZEDCYLINDER 3 INJECTOR CIRCUIT
1 DEF : Open circuit or short-circuit
CO  : open circuit
CC.O : s hot circuit at mass
CC.1 : s hort circuit at + 12 V.
RECOMMENDATIONS
Perform the operations from ” recommendations” for reparat ion confirmation
Fi x any other possible failures
Erase  the failures memoriz ed by the injection computer.
Pe rform a conformity checking by means of the CLIP tester.AF TER
REPARATION
Conditions for diagnostic appl ication to memorized failure:
Start t he engine and  especially stop it immediately the failure is becoming
presen t, so that catalyst-dama ging risk is avoide d.
 In case  of failures addition, treat as most important, failure “ DF009 actuators
relay control circuit”.
* If the failure is memorized with OBD indicator on, check in the context part,
if  state “ET280 :  Cylinder 3 injector circuit” corresponding to the OB D indicator
lighting request is affirma tive. In this case, proceed as per bellow me ntioned
met hod.
C heck the connection and condition of the  injector 3 connector.
R eplace the connector  if necessary.
C heck the injector 3 resistance. Refer to chapter “Help” in order to compare the resistance values.
R eplace the injector if necessary.
When setting the contact on, check the  presence of supplying +12 V on pin 1 of the  injector  3.
Fix, if necessary the electric routing up to actua tors relay.
C onnect the 90 ways terminal box instead of the injection computer then check the  in s u la t ion and
continuity  on line:
 pin 60 injection computer    > pin 2 injector 3
Fi x if  necessary.
If afte r these checking the problem is persisting, treat the other failures then perform the conformity
checking.
Diagnostic – Failures interpretation
vnx.su  

IGNITION AND  INJECTION
17
17 - 43
Perform the operations from ” recommendations” for reparation confirma tion.
Fi x any other possible failures.
Erase  the failures memoriz ed by the injection computer.
Pe rform a conformity checking by means of the CLIP tester.
AF
TER
REPARATION
CYLINDER 4  INJECTOR CIRCUIT
1.  DEF :  Open circuit or short-circuit
CO  : open circuit
CC.O : s hot circuit at mass
CC.1 : s hort circuit at + 12 V.
DF 055
P RESENT
OR
  MEMO RIZED
Conditions for diagnostic appl ication to memorized failure:
Start the engine and  especially stop it immediately the failure i s becoming
present, so  that catalyst-dama ging risk is avoide d.
  In case of failures addition, treat as most important, failure “ DF009
actua tors relay control cir cuit”
* If the failure is memorized with OBD indicator on, check in the context
part, if state “ET281 :  Cylinder 4 injector circuit” corresponding to the
OBD indicator lighting request is affirmative. In this case, proceed as per
bellow mentioned method
C heck the connection and condition of the  injector 4 connector.
R eplace the connector  if necessary.
C heck the injector 4 resistance. Refer to chapter “Help” in order to compare the  resistance values.
R eplace the injector if necessary.
When setting the contact on, check the  presence of supplying +12 V on pin 1 of the  injector  4.
Fix, if necessary the electric routing up to actua tors relay.
C onnect the 90 ways terminal box instead of the  injection computer the n check the  insulation and
continuity on line :
pi n 89 injection computer      > pin 2 injector 4
Fi x if  necessary.
If after these checking the problem is persisting, treat the other failures then perform the conformity
checking
Diagnostic – Failures interpretation
RE COMMENDATIONS
vnx.su  

IGNITION AND  INJECTION
17
17 - 44
DF 057
P RESENT
OR
ME MO RIZED
If   failure “ DF345” : Supply 5 volts potentiometers or  sensor s” is
prese nt or memoriz ed, this must be treate d as most important.
Conditions for diagnostic appl ication to memorized failure:
Se t  the contact on.
St art the engine, ensur e tha t state “ET030: Upstream oxygen se nsor
he a ting”  is ACTI VE  a nd w a it tha t sta te  “ ET037 :  Enr ic hing
adjustment ” is ACTIVE, t hen wait for 5 minutes.
* If the  failure is memorized with OBD indicator  on, check in the
context part, if state “ET285 : Upstream oxygen sensor circuit” corre-
s ponding to the OBD indicator lighting request is affirma tive. In this
case , proceed as per bellow mentioned method.
RE COMMENDATIONS
UPSTREAM OXYGEN SENSOR CIRCUIT
1.DEF  : Open circuit or short-circuit
C heck the  connection and condition of the oxygen sensor connector
Check if there is no  water penetration in connector  (a possible cause for engine unstable running)
R eplace the connector  if necessary.
C heck for lack of tightening  between the exhaust collector and catalyst
If the  vehicle  is running more in the city, perform a cleaning of the  oxygen se nsor.
C onnect the 90 ways terminal box instead of the injection computer the n check the  insulation,
continuity and absence of the parasite resistance on lines: Pin 45 injection computer     >  pi n C oxygen sensor
Pin 80 injection computer     >  pi n D oxygen sensor
Fi x if  necessary.
If the  proble m is persisting, replace the  oxygen sensor.
If the problem is persisting after these checking, treat the other failures then perform the conformity
checking.
Perform the operations from ” recommendations” for reparation confirma tion.
Fi x any other possible failures
Erase  the failures memoriz ed by the injection computer.
Pe rform a conformity checking by means of the CLIP tester.
AF
TER
REPARATION
Diagnostic – Failures interpretation
vnx.su