Dacia Solenza 2004, Repair Manual

Page: 139 / 891

IGNITION AND INJECTION
17
17 - 45
If failure “DF345” : Supply 5 volts potentiometers or sensors” is present or
memorized, this must be treated as most important.
Conditions for diagnostic application to memorized failure:
- During road test, smooth driving, after an engine fan starting and state
“ET027: Enriching double loop” to be active.
- During road test, smooth driving, after an engine fan starting, immediately
followed by a deceleration (rising gradient) with state “ET003: Released
pedal valve position” active, gearbox ratio engaged and clutched.
* If the failure is memorized with OBD indicator on, check in the context
part, if state “ET287 : Downstream oxygen sensor circuit” corresponding
to the OBD indicator lighting request is affirmative. In this case, proceed
as per bellow mentioned method
Check the connection and condition of the oxygen sensor connector
Replace the connector if necessary.
Check for lack of tightening
on the routing between the two oxygen sensors.
If the vehicle is running more in the city, perform a cleaning of the oxygen sensor.
Connect the 90 ways terminal box instead of the injection computer then check the
insulation,
continuity and absence of the parasite resistance on lines:
Pin 44 injection computer > pin C oxygen sensor
Pin 76 injection computer > pin D oxygen sensor
Fix if necessary.
If the problem 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 confirmation.
Fix any other possible failures.
Erase the failures memorized by the injection computer.
Perform a conformity checking by means of the CLIP tester.
AFTER
REPARATION
Diagnostic – Failures interpretation
DF 058
PRESENT
OR
MEMORIZED
DOWNSTREAM OXYGEN SENSOR CIRCUIT
1.DEF : Open circuit or short-circuit
RECOMMENDATIONS
vnx.su