PETROL INJECTION
Fault finding – Interpretation of parameters17B
17B - 165V12 MR-372-J84-17B000$675.mif
SAGEM 3000
Program No.: A7
Vdiag No.: 44, 48
PR099
DOWNSTREAM OXYGEN SENSOR VOLTAGE
NOTESThere must be no present or stored faults.
Check the cleanliness and condition of the downstream oxygen sensor connections.
Repair if necessary.
Disconnect the battery and the injection computer.
Using the universal bornier, check the insulation and continuity on the following connections:
Injection computer, connectorC, track A2 track D of the downstream oxygen sensor
Injection computer, connectorC, track B2 track C of the downstream oxygen sensor
Repair if necessary.
Check that the downstream oxygen sensor is secure.
Repair if necessary.
If the vehicle is driven frequently in town, carry out the unclogging procedure (oxygen sensors and catalytic
converter clogging).
Check that the exhaust pipe is completely leak free.
Repair if necessary.
Replace the downstream oxygen sensor.
If the fault is still present, the catalytic converter is certainly damaged.
If the catalytic converter is defective, determine the cause of the destruction, otherwise the new catalytic
converter may be damaged in turn.
Remove the catalytic converter.
Possible reasons for the destruction of a catalytic converter:
–deformation (impact),
–thermal shock (cold water splashed onto a hot catalytic converter can damage it),
–defective injector or ignition: the catalytic converter is damaged by contact with fuel (coil fault, coil control fault,
injector jammed open),
–injector leak,
–abnormal oil or coolant consumption (defective cylinder head gasket),
–use of a fuel additive or other equivalent product (obtain information from the customer because this type of
product can contaminate the catalytic converter and render it useless sooner or later).
Look up the service history of the vehicle or, if this is not possible, ask the customer if the vehicle has had injection
or ignition faults.
If the cause of the catalytic converter damage has been found and the fault has disappeared, replace the
catalytic converter.
AFTER REPAIRRepeat the conformity check from the start.
JSAA741.0
17B-167
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition and perform a road test followed by a check using the diagnostic
tool.
V12 MR-372-J84-17B000$765.mif
17B
SAGEM 3000
Program No.: A7
Vdiag No.: 44, 48
SC006
RUN OBD TEST: CATALYTIC CONVERTER
NOTESIMPORTANT:
Do not perform this test with a new catalytic converter.
Repair all the electrical faults and clear them from the memory.
Program the flywheel target ET089 Programming the engine flywheel target.
Check the appearance and condition of the catalytic converter.
Check there are no air leaks, thermal shock, misfiring, coolant or oil consumption.
It is preferable to run this command with a warm engine. This reduces the time it takes
for the catalytic converter to heat up.
The purpose of this command is to determine the condition of the catalytic converter
Procedure:
– Engine stopped.
– Run command SC006.
– Start the vehicle without losing the + after ignition feed
– Wait for the command result.
At the end of this test, four different results are possible:
–Status 1: Fault finding not carried out/impossible to obtain the necessary conditions.
–Status 2: Component in an average condition.
–Status 3: Component in good condition.
–Status 4: Component in poor condition.
When the command is complete and after the result has been read, stop the engine and start it again to obtain the
conditions relating to normal use.
If the result is Status 1: check for any faults, and the engine flywheel target programming using ET089.
If the result is Status 2 or Status 4: replace the catalytic converter.
If the result is Status 3: the catalytic converter is in good condition.
S3000_V44_SC006 / S3000_V48_SC006
JSAA741.0
PETROL INJECTION
Fault finding – Interpretation of commands
17B-168
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition and perform a road test followed by a check using the diagnostic
tool.
V12 MR-372-J84-17B000$765.mif
PETROL INJECTION
Fault finding – Interpretation of commands17B
SAGEM 3000
Program No.: A7
Vdiag No.: 44, 48
*EOBD: European On Board DiagnosticsSC007
RUN OBD TEST: O2 SENSOR
NOTESRepair all the electrical faults and clear them from the memory.
Program the flywheel target ET089 Programming the engine flywheel target.
It is preferable to run this command with a warm engine. This reduces the time it takes
for the catalytic converter to heat up.
The aim of this command is to detect a fault causing the EOBD* threshold for pollutant emissions to be exceeded.
There are two kinds of oxygen sensor damage:
– mechanical damage to the component (breakage, cut in wire) which leads to an electrical fault,
– chemical or thermal damage to the component leading to a slower response time of the sensor and to the
increase in the average reaction time.
Procedure:
– Engine stopped.
– Run command SC007.
– Start the vehicle without losing the + after ignition feed
– Wait for the command result.
Fault finding is entirely autonomous. When completed, the throttle control ceases and the engine returns to idling
speed regulation operation.
At the end of this test, four different results are possible:
–Status 1: Fault finding not carried out/impossible to obtain the necessary conditions.
–Status 2: Component in an average condition.
–Status 3: Component in good condition.
–Status 4: Component in poor condition.
When the command is complete and after the result has been read, stop the engine and start it again to obtain the
conditions relating to normal use.
If the result is Status 1: check for any faults, and the engine flywheel target programming using ET089.
If the result is Status 2 or Status 4: replace the sensor.
If the result is Status 3: the sensor is in good condition.
S3000_V44_SC007 / S3000_V48_SC007
JSAA741.0
17B-170
AFTER REPAIRRepeat the conformity check from the start.
V12 MR-372-J84-17B000$765.mif
PETROL INJECTION
Fault finding – Interpretation of commands17B
SAGEM 3000
Program No.: A7
Vdiag No.: 44, 48
AC015
CONTINUED
IF THE PUMP DOES
NOT OPERATEDisconnect the fuel pump.
Check the cleanliness and condition of the connections.
Check for the + 12 V feed on the fuel pump connector with the ignition on (see
Technical Note 8227 Wiring Diagram, MEGANE II, 456).
If there is no + 12V:
– disconnect the battery,
– disconnect the connector marked PPH2 in the Protection and Switching Unit,
– check the cleanliness and condition of the connections,
– using the Universal bornier, check for continuity on the following connection:
Protection and Switching Unit
connector PPH2 track 5Fuel pump connector
Repair if necessary.
Reconnect the Protection and Switching Unit connector and reconnect the battery.
If the + 12 V feed is still not present on the fuel pump relay connector with the ignition
on, there is a fault with the Protection and Switching Unit.
Contact the Techline.
Check that the earth on the fuel pump connector is present with the ignition on
(seeTechnical Note 8227 Wiring Diagram, MEGANE II, 456).
Repair if necessary.
If the fault is still present, replace the fuel pump.
JSAA741.0
17B-171
AFTER REPAIRRepeat the conformity check from the start.
V12 MR-372-J84-17B000$765.mif
PETROL INJECTION
Fault finding – Interpretation of commands17B
SAGEM 3000
Program No.: A7
Vdiag No.: 44, 48
AC017
CANISTER BLEED SOLENOID VALVE
NOTESThere must be no present or stored faults.
Check the cleanliness and condition of the fuel vapour absorber bleed solenoid valve connections.
Repair if necessary.
Measure the resistance between tracks 1 and 2 of the fuel vapour absorber bleed solenoid valve. Replace the
fuel vapour absorber bleed solenoid valve if the resistance is not 26 ±4 at 23°C.
Check for + 12 V feed on track 1 of the fuel vapour absorber bleed solenoid valve with the ignition on.
If there is no + 12V:
– disconnect the battery,
– disconnect the connector marked PPM1 in the Protection and Switching Unit,
– check the cleanliness and condition of the connections,
– using the Universal bornier, check the continuity on the following connection:
Protection and Switching Unit connector PPM1 track 2 track 1 of the fuel vapour absorber
bleed solenoid valve
Repair if necessary.
Reconnect the Protection and Switching Unit connector and reconnect the battery.
With the ignition on, if the +12V is still not present on the fuel vapour absorber canister bleed solenoid valve
connector, there is a fault with the Protection and Switching Unit.
Contact the Techline.
Disconnect the battery.
Disconnect the computer. Check the cleanliness and condition of the connections.
Using the Universal bornier, check for insulation and continuity on the following connection:
Injection computer, connector C, track E1 track 2 of the fuel vapour
absorber bleed solenoid valve
Repair if necessary.
If the fault persists, replace the solenoid valve.
JSAA741.0
17B-172
AFTER REPAIRIf the throttle valve has been replaced, reinitialise the programming (RZ005).
Repeat the conformity check from the start.
V12 MR-372-J84-17B000$765.mif
PETROL INJECTION
Fault finding – Interpretation of commands17B
SAGEM 3000
Program No.: A7
Vdiag No.: 44, 48
AC027
MOTORISED THROTTLE
WARNING
Never drive the vehicle without checking first that there are no throttle valve faults.
NOTESThere must be no present or stored faults.
Switch on the ignition and activate command AC027.
If the motorised throttle does not work, apply the interpretation for DF079 Motorised throttle valve automatic
control.
JSAA741.0
PETROL INJECTION
Fault finding – Fault Finding Chart17B
17B - 176V12 MR-372-J84-17B000$900.mif
SAGEM 3000
Program No.: A7
Vdiag No.: 44, 48PETROL INJECTION
Fault finding – Fault Finding Chart
ALP 1 No dialogue with the computer
NOTESNone
Test the diagnostic tool on another vehicle in perfect working order.
Check that the sensor's green indicator light comes on.
Communication with the second vehicle is impossible, follow the instructions in the CLIP diagnostic tool check
section.
If you establish dialogue with the second vehicle, follow the instructions in the Vehicle check section.
CLIP
DIAGNOSTIC
TOOL CHECK
CLIP VEHICLE
CHECK
Check the cleanliness and condition of the diagnostic socket contacts which
connect to the vehicle.
Check the condition of the cable from the diagnostic socket to the sensor, and the
cleanliness and condition of the connections.
Check the sensor connections.
Check the condition of the cable from the sensor to the CLIP tool, and the
cleanliness and condition of the connections.
Check the cleanliness and condition of the CLIP socket.
If the fault is still present, contact Techline.
Check the electrical voltage of the battery.
Check the cleanliness and condition of the battery terminals.
Check the condition and tightness of the cable going from the battery + terminal to
the Protection and Switching Unit.
Check the condition of the battery earth cable and ensure that there is a good
electrical connection with the bodywork.
Check the injection computer earth terminal for cleanliness and make sure it is
properly connected to the bodywork.
Check the Protection and Switching Unit's main 30A power supply fuse, plus the
condition and cleanliness of the contacts (see Protection and Switching Unit fault
finding).
Check the injection computer after ignition feed 5A fuse, plus the condition and
cleanliness of the contacts.
AFTER REPAIRRepeat the conformity check from the start.
JSAA741.0
MR-372-J84-17B000$900.mif
PETROL INJECTION
Fault finding – Fault Finding Chart17B
17B - 177V12 MR-372-J84-17B000$900.mif
SAGEM 3000
Program No.: A7
Vdiag No.: 44, 48
ALP 1
CONTINUED 1
CLIP VEHICLE
CHECK
(CONTINUED 1)Using the Universal bornier, check the following tracks on the vehicle's diagnostic
socket:
Track 1 + After ignition
Track 16 +Battery
Tracks 4 and 5 Earth
Repair if necessary.
Disconnect the battery and the injection computer.
Check the cleanliness and condition of the computer connections.
Using the universal bornier, check for continuity on the CAN communication lines:
Injection computer track A4 connector A track 6 of the
diagnostic socket
Injection computer track A3 connector A track 14 of the vehicle
diagnostic socket
Repair if necessary.
Check the continuity of the K communication line:
Injection computertrack B4 connector A track 7 of the vehicle
diagnostic socket
Repair if necessary.
Disconnect the computer earth terminal from the negative battery terminal.
Check the continuity and insulation of the following tracks:
Injection computer track L1 connector C Earth terminal
Injection computer track M1 connector C Earth terminal
Injection computer track M1 connector B Earth terminal
Injection computer track L1, connector B Earth terminal
Repair if necessary.
AFTER REPAIRRepeat the conformity check from the start.
JSAA741.0