navigation RENAULT SCENIC 2008 J84 / 2.G Engine Compartment Connection Unit Workshop Manual

ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Introduction87G
87G - 3V7 MR-372-J84-87G050$055.mif
UPC
Vdiag No.: 48, 4C
3. REMINDER
PROCEDURE
To run fault finding on the vehicle's computers, switch on the ignition in fault finding mode (forced + after ignition
feed). Run the self-test procedure for the UPC internal relays and fuses using AC016 Electrical supply circuit
test.
Depending on the type of vehicle equipment, proceed as follows:
To cut off the + after ignition feed, proceed as follows:
Faults
Faults are declared as either present or stored (depending on whether they appeared in a certain context and have
disappeared since, or whether they remain present but have not been diagnosed within the current context).
The present or stored status of faults should be taken into consideration when the diagnostic tool is used following
the + after ignition supply being switched on (without operating the system components).
For a present fault, apply the procedure described in the Interpretation of faults section.
For a stored fault, note the faults displayed and apply the instructions in the Notes section.
If the fault is confirmed when the instructions in the Notes section are applied, the fault is present. Deal with the fault
If the fault is not confirmed, check:
–the electrical lines which correspond to the fault,
–the connectors on these lines (corrosion, bent pins, etc.),
–the resistance of the component detected as faulty,
–the condition of the wires (melted or split insulation, wear). WARNING
Switch off all unnecessary consumers:
–Radio navigation system.
–Switch the passenger compartment ventilation speed to 0.
–Switch off the interior lights (forced off).
With the vehicle card in the card reader, press and hold the start button (+ 5 seconds) outside starting conditions,
connect the diagnostic tool and carry out the required operations.
Press the start button twice briefly (less than 3 seconds); check that the + after ignition feed has cut (computer
indicator lights on the instrument panel go out).

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