86A-17
MR-413-X44-86A000$819_eng.mif
V1
RADIO
Fault finding chart86A
ALP 2The radio does not work (no sound) when the
“ON” button is pressed
Press the radio's “ON” button.
YES
Is the display working? (backlighting)
NO
Check the radio's fuse F48 (15A) (see Wiring
Diagrams Technical Note for New Twingo,
code 1016).
Is the fuse sound?
YES
Check the continuity of connections BCP4 and
MAO (see Wiring Diagrams Technical Note
for New Twingo, code 261).
Is the wiring harness sound?
YES
Replace the radio.
YES
NOCheck the insulation to earth of connection
BCP4 between components 1016 and 261. If
the insulation is correct, replace the fuse, or if
it is faulty and if there is a repair procedure
(see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise replace it.
NOIf there is a repair procedure (see Technical
Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the
wiring, otherwise replace it.
A
86A-20
MR-413-X44-86A000$819_eng.mif
V1
RADIO
Fault finding chart86A
ALP 3The radio does not switch on automatically or switches off
after 20 minutes
Check that the system is operating correctly.
–Switch to + after ignition position.
–Switch on the radio.
–Switch off the + after ignition feed; the radio
should switch off.
–Switch on + after ignition feed again; the
radio should switch on.
Has the fault disappeared?
NO
Check the + accessories feed with a
multimeter.
Is there + 12 V on connection SP2 of the radio
(component 261)?
YES
Replace the radio.
YESEnd.
NOCheck supply fuse F29 (15A) (see Wiring
Diagrams Technical Note for New Twingo,
code 1016).
A
86A-21
MR-413-X44-86A000$819_eng.mif
V1
RADIO
Fault finding chart86A
ALP 3
CONTINUED
Check the insulation to earth of connection SP2
between components 261 and 1016.
Is the insulation correct?
YES NO
Replace the fuse.
Does the radio operate after the fuse has been
replaced?
YES
The fault has been rectified.
NOIs the fuse sound?
YES
Check the continuity of connection SP2
between components 1016 and 261.
Is the continuity good?
YES
Replace the radio.
If there is a repair procedure (see Technical
Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the
wiring, otherwise replace it.
NOA
