36B-43
MR-413-X44-36B000$938.mif
V2
36B
POWER – ASSISTED STEERING
Fault finding – Fault finding Chart
ALP 1 No dialogue with the computer
NOTESUse the Technical Note wiring diagram for New Twingo.
Try to establish dialogue with a computer on another vehicle to check that the diagnostic tool is not faulty.
If the tool is not faulty and no dialogue is established with any other computer of the same vehicle, check the
tightness and condition of the battery terminals (see 80A, Battery).
Check the charging circuit (see 16A, Starting - Charging).
With connector A of component 502 and the connector of components 1222 and 1094 disconnected, check the
continuity and insulation of connection HK between components 502 and 225.
If the connection(s) are faulty and there is a repair method (see Technical Note 6015A, Repairing electrical
wiring, W iring: Precautions for repair), repair the wiring, otherwise replace it.
If the checks reveal no faults, check the conformity of components 1022 and 1094.
Check the condition and the position of the 80 A fuse in the engine fuse and relay box.
Check the condition and the position of fuse F3 (15 A) in the passenger compartment fuse box.
With the ignition on and the engine stopped, check for a voltage equal to the battery voltage on connections BP81
and AP23 against earth ML.
Connectors of component 502 disconnected, check the condition and conformity of the connectors and clips.
If the connector is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the connector, otherwise replace the wiring.
With the connectors of components 597 and 1016 disconnected:
Check the continuity and insulation of connection BP81 between components 502 and 597.
Check the continuity and insulation of connection AP23 between components 502 and 1016.
Check the continuity and insulation of connection ML of component 502.
If the connection(s) are faulty and there is a repair method (see Technical Note 6015A, Repairing electrical
wiring, W iring: Precautions for repair), repair the wiring, otherwise replace it.
If the checks reveal no faults, check the conformity of components 597 and 1016.
If the fault is still present, contact Techline.
AFTER REPAIRPerform a test using the diagnostic tool.
DAE_V04_ALP1/ DAE_V08_ALP1
EPAS
Vdiag No.: 04 - 08
MR-413-X44-36B000$938.mif
