Page 7 of 22

16A-7V2 MR-413-X44-16A000$750.mif
16A
New Twingo
ALP1 The starter does not work
NOTESTest the condition of the battery (see 80A, Battery).
Test the condition of the power fuse (see TEST 2).
Check that fuse F9 on component 1016 is in good condition.
Check that the engine is not jammed.
Check that the following terminals are
correctly tightened:
⇒ the battery
⇒ starter
⇒ engine earth
⇒ bodywork earth
Retighten the terminals (see MR 411, 80A,
Battery, Battery: Removal - Refitting).
Are the terminals correctly tightened?
Check that the following wires are in good
condition:
⇒ the wire connecting the battery +,
component 107, to terminal B+ of the
starter, component 163,
⇒ the wire connecting the battery - to
the bodywork earth,
⇒ the wire connecting the engine to
the bodywork earth.Repair the damaged wires and terminals. If the
connection is faulty and if there is a repair
procedure (see Technical Note 6015A, repairing
electrical wiring, wiring: Precautions for
repair), repair the wiring otherwise change the
wiring. Are the wires in good condition?
Try starting.
If the starter still does not turn, can a clicking
noise be heard when the starter is
activated?
NO
YES
NO
YES
NO
A
YES
B
STARTING-CHARGING
Fault finding – Fault finding charts
Page 10 of 22

16A-10V2 MR-413-X44-16A000$750.mif
STARTING-CHARGING
Fault finding – Fault finding charts16A
New Twingo
ALP1
CONTINUED 3
Use the diagnostic tool to check DEF 062 of
the starter relay control circuit (see 87B,
Passenger compartment connection unit,
Interpretation of faults).
Is the fault present?Fault on connection 1B between components
597 and 645 (see 87B, Passenger
compartment connection unit,
Interpretation of faults). If there is a repair
method (see Technical Note 6015A,
Repairing electrical wiring, Wiring:
Precautions for repair) repair the wiring,
otherwise replace it.
Check the starting conditions (see 87B,
Passenger compartment connection unit,
Interpretation of statuses).
Is ET046 immobiliser active?Starting conditions fault (see 87B, UCH,
Interpretation of statuses).
With the ignition on, check for 12 V between
connections AP29 and 1B of the relay
connector, component 232, located on the
engine relay box, component 597.
Is there 12 V?Check the continuity and/or the insulation of
connections 1B between components 232 and
645, or of connection AP29 of components 232
and 1016.
If the connection is faulty and if there is a repair
procedure (see Technical Note 6015A,
repairing electrical wiring, wiring:
Precautions for repair), repair the wiring
otherwise change the wiring.
Check for 12 V on relay 232 between
connection D of component 232 and a chassis
earth when starting is requested.
Is there 12 V?Check the continuity and/or the insulation of
connection D between components 232
and 104.
If the connection is faulty and if there is a repair
procedure (see Technical Note 6015A,
repairing electrical wiring, wiring:
Precautions for repair), repair the wiring
otherwise change the wiring.
C
YES
NO
YES
NO
NO
YES
NO
YES
D
Page 20 of 22
16A-20V2 MR-413-X44-16A000$875.mif
STARTING-CHARGING
Fault finding – Tests16A
New Twingo
TEST2
CONTINUED 1
Check the wiring connecting the alternator and the
starter to the battery + terminal (see TEST 3).Replace the alternator (see MR 411, 16A,
Starting - Charging, Alternator: Removal -
Refitting).
Is it in good condition?
Replace the starter (see MR 411, 16A, Starting -
Charging, Starter: Removal - Refitting).
Repair the damaged wires and terminals. If the
connection is faulty and if there is a repair procedure
(see Technical Note 6015A, repairing electrical
wiring, wiring: Precautions for repair), repair the
wiring otherwise change the wiring.
Replace the power fuse (see MR 411, 80A, Battery, Battery: Removal - Refitting).
A
NO
B
YES
NOYES
C
Page 21 of 22

16A-21V2 MR-413-X44-16A000$875.mif
STARTING-CHARGING
Fault finding – Tests16A
New Twingo
TEST3 Wiring test
Check the condition of the battery terminals.
Check that there is no corrosion on the battery
terminals. Check that the terminals are
correctly tightened and secure (see MR 411
Mechanical, 80A, Battery, Battery:
Removal - Refitting).
Are the terminals and posts in good condition
and not corroded?Clean the terminals and posts or replace them,
if necessary.
Check that there are no electrolyte leaks from
the battery (cracks or breakage).
Check that the mechanical mounting of the
battery is sound (see MR 411, Mechanical,
80A, Battery, Battery: Removal - Refitting).
Change the battery and clean the surrounding
area on the vehicle if necessary.
(see MR 411, Mechanical, 80A, Battery,
Battery: Removal – Refitting). Is the battery in good condition?
Inhibit the engine injection (see 13B or 17B,
Interpretation of commands).
With the starter activated, measure the voltage
on connection BPDA between the + terminal of
the battery, component 107, and the B+ of the
starter, component 163.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 Is the voltage > 1 V?
NO
YES
NO
YES
YES
NO
A
Page 22 of 22

16A-22V2 MR-413-X44-16A000$875.mif
STARTING-CHARGING
Fault finding – Tests16A
New Twingo
TEST3
CONTINUED
Check that all the wires connecting the battery,
the alternator and the starter are secure and in
good condition, and that all 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 With the engine running and the main beam
headlights lit and the heated rear screen on,
measure the voltage between the B+ of the
battery, component 107, and the B+ of the
alternator, component 103.
Is the voltage > 0.7 V?
With the engine running and the main beam
headlights lit and the heated rear screen on,
measure the voltage between the negative
terminal of the battery, component 107, and
the alternator frame, component 103.Check the earths of the engine, the alternator,
the chassis, the gearbox, the battery, or the
starter (check the tightness and condition of
the terminals and the condition of the wires)
(see Technical Note for the relevant
vehicle).
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 Is the voltage > 0.7 V?
The electrical circuit is in good order.
A
NO
YES
NO
YES
NO