battery RENAULT SCENIC 2008 J84 / 2.G Engine Compartment Connection Unit User Guide

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check87G
87G-63V7 MR-372-J84-87G050$440.mif
UPC
Vdiag No.: 48, 4C
FUNCTION: CHARGE CIRCUIT
SUB-FUNCTION: BATTERY
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application conditions: engine stopped, + after ignition feed active.
FunctionParameter or Status
Check or ActionDisplay and Notes Fault finding
VoltagesPR004:Battery voltage11 < X < 13.5 V
engine running
< 15.8 VIn the event of a fault, apply the
procedure for dealing with PR004
Battery voltage.
PR008:Battery voltage
after rest12.2 V < X <13.5 VIn the event of a fault, apply the
procedure for dealing with PR008
Battery voltage after rest.

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Parameter summary table87G
87G - 71V7 MR-372-J84-87G050$605.mif
UPC
Vdiag No.: 48, 4CENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Parameter summary table
Tool parameter Diagnostic tool title
PR004Battery voltage
PR008Battery voltage after rest
PR010Alternator charge
MR-372-J84-87G050$605.mif

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters87G
87G-72V7 MR-372-J84-87G050$660.mif
UPC
Vdiag No.: 48, 4CENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters
PR004
BATTERY VOLTAGE
NOTESSpecial notes:
Check that all of the electrical consumers are switched off:
–Passenger compartment blower unit stopped.
–Radio off (and Radio navigation system if fitted to the vehicle).
–Interior lights off.
If fault DF013 Voltage regulation is not present (or stored):
With the engine stopped and no electrical consumers operating for 5 minutes.
Check the battery, see TEST3 Battery status test.
If fault DF013 Voltage regulation is present:
With the engine running at idle speed, and electrical consumers activated:
–Dipped headlights and side lights.
–Electric heated rear screen.
–Passenger compartment blower unit in maximum position.
Check the consistency between the battery voltage measurement from the multimeter and the value of PR004
Battery voltage.
If the difference is greater than 1 V check the conformity of the Protection and Switching Unit supply circuit and
the charging circuit wiring TEST2 Wiring test.
Repair if necessary, otherwise replace the Protection and Switching Unit (see Replacement of components).
AFTER REPAIRRepeat the conformity check from the start.
USM_V48_PR004 /USM_V4C_PR004
MR-372-J84-87G050$660.mif

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters87G
87G-73V7 MR-372-J84-87G050$660.mif
UPC
Vdiag No.: 48, 4C
PR008
BATTERY VOLTAGE AFTER REST
NOTESSpecial notes:
This value can only be interpreted after the engine and electrical consumers have been
stopped for at least 8 hours.
Apply if the Charge battery message is displayed on the instrument panel.
Recharge the battery (see Technical Note 6512A, Charging).
Check the battery (see 80A, Battery).
AFTER REPAIRRepeat the conformity check from the start.
USM_V48_PR008 /USM_V4C_PR008

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Fault finding charts87G
87G-90V7 MR-372-J84-87G050$880.mif
UPC
Vdiag No.: 48, 4CENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Fault finding charts
ALP1 No dialogue with the computer
NOTESRun a complete multiplex network check using the diagnostic tool.
Check the condition and connection of the connectors and fuses on the Protection
and Switching Unit.
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
Try the tool on another vehicle.
Check the voltage of the battery.
Check the condition and connection of the battery fuse box fuses and terminals.
Replace the defective fuse.
If the connection is defective and there is a repair method (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for + 12 V on the screwed-in power terminal of the Protection and Switching Unit.
If the connection is defective and there is a repair method (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for earth on connection codes MAS and NAM of connector CM of the Protection and Switching Unit,
component code 1337.
If any of the connections are defective and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for a + 12 V battery on connection code BP32, + 12 V APC on connection code AP43 and an earth on
connection codes NAM and MAM of the diagnostic socket.
If any of the connections are defective and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If dialogue with the computer is still not possible, contact the Techline.
AFTER REPAIRCheck that no fault is present.
USM_V48_ALP1 /USM_V4C_ALP1
MR-372-J84-87G050$880.mif

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Tests87G
87G-93V7 MR-372-J84-87G050$935.mif
UPC
Vdiag No.: 48, 4C
TEST1 Wiring check
Check the condition of the battery terminals.
Check that there is no corrosion on the
battery terminals. Check that the terminals
are correctly tightened (see MR 364 or
MR 370 Mechanical, 80A, Battery,
Battery: Removal - Refitting).
Clean the terminals and posts or replace them, if
necessary Are the terminals and posts in good
condition and not corroded?
Check that there are no electrolyte leaks
from the battery (cracks or breakage).
Check that the battery is correctly fitted
mechanically (see MR 364 or MR 370
Mechanical, 80A, Battery, Battery:
Removal - Refitting).
Replace the battery if necessary and clean the
surrounding area in the vehicle (see MR 364 or
MR 370 Mechanical, 80A, Battery, Battery:
Removal - Refitting). Is the battery in good condition?
With the engine stationary, check that all
the wires connecting the battery to the
starter are in good condition, and that their
terminals are correctly tightened and
secure.
Repair the damaged wires and terminals. If the
connection is faulty and if there is a repair
procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair),
repair the wiring, otherwise replace the wiring. Are the connections in good condition?
NO
YES
NO
YES
NO
YES
A
AFTER REPAIRCarry out a complete check with the diagnostic tool.
USM_V48_TEST1/USM_V4C_TEST1

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Tests87G
87G-94V7 MR-372-J84-87G050$935.mif
UPC
Vdiag No.: 48, 4C
TEST1
CONTINUED
With the engine running, main beam
headlights and heated rear screen on,
measure the voltage between the B+
battery feed and B+ alternator feed
Check the condition of all the wires connecting the
battery, alternator and starter and that all of their
terminals are correctly tightened. Is the voltage > 0.7 V?
Repair any damaged wires and terminals. If the
connection is faulty and if there is a repair
procedure (see Technical Note 6015A Electrical
wiring repair, Wiring: Precautions for repair),
repair the wiring, otherwise replace the wiring
With the engine running, main beam
headlights and heated rear screen on,
measure the voltage between the B- battery
feed and the alternator frame.Check the earths for the engine, the alternator, the
chassis, the gearbox, the battery or the starter
(check for tightness, check the condition of the
terminals and the condition of the wires) (see
Technical Note for the relevant vehicle). Is the voltage > 0.7 V?
Repair any damaged wires and terminals. If the
connection is faulty and if there is a repair
procedure (see Technical Note 6015A Electrical
wiring repair, Wiring: Precautions for repair),
repair the wiring, otherwise replace the wiring The electrical circuit is in good order.
A
YES
YES
NO
YES
NO
AFTER REPAIRCarry out a complete check with the diagnostic tool.