38C-50
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool
If the fault is still present, contact the Techline.
V3 MR-413-X44-38C050$101.mif
ANTI-LOCK BRAKING SYSTEM
Fault finding – Interpretation of faults38C
Bosch 8.1 ESP
Vdiag No.: 05
DF100
PRESENT
OR
STOREDNO STEERING WHEEL ANGLE MULTIPLEX SIGNAL
NOTESUse the Wiring Diagram Technical Note for New Twingo.
Check that the connections and location of any special fittings (CB, car phone, amplifier, etc.) are not preventing
the system from working correctly.
With the ignition on, check for 12 V between connections NAM and AP5 of component 583.
Is the voltage measured correct?
YESConnectors of components 1175, 1094, 583 and intermediate union
R107 disconnected.
Check the insulation and continuity of connections 4AP and 4AH between
component 583 and intermediate union R107.
Check the insulation and continuity of connections 4AP and 4AH between
intermediate union R107 and component 1094.
If the connections are faulty (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
NOCheck the condition and position of fuse F10 (5A) in the passenger compartment fuse
box (see 81C, Fuse box).
Check the connection and condition (possible wiring damage) of the connectors of
components 583 and 1016.
If the connector is faulty (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Connectors of components 1175, 1094, 583 and intermediate union
R107 disconnected.
Check the insulation and continuity of connection AP5 between component 1016
and component 583.
Check the continuity and insulation of connection AP5 between component 1094
and intermediate connector R107.
Check the continuity and insulation of connection NAM between component 583
and the chassis earth (tightness, oxidation, etc.).
If the connections are faulty (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
ESP_V05_DF100
38C-85V3 MR-413-X44-38C050$170.mif
38C
Bosch 8.1 ESP
Vdiag No.: 05
NOTESOnly check the customer complaint after performing a full check with the
diagnostic tool.
FAULTS DETECTED ON BRAKING WITH ABS/BRAKING REGULATION
Locking of one or more wheels ALP2
PullALP3
DriftALP4
Unexpected ABS operation at low speed and with slight pedal pressure ALP5
Unexpected ABS operation on a poor road surface ALP6
Unexpected ABS operation when using special equipment (car phone, CB, etc.) ALP7
Lengthening of the brake pedal travel following a regulation phase (with an
irregular pedal when entering the regulation phase)ALP8
Spongy pedalALP9
Brake pedal vibrationALP10
Noises from the pump, the pipes or the hydraulic unit ALP11
ANTI-LOCK BRAKING SYSTEM
Fault finding – Customer complaints
38C-93
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
V3 MR-413-X44-38C050$180.mif
ANTI-LOCK BRAKING SYSTEM
Fault finding – Fault finding chart38C
Bosch 8.1 ESP
Vdiag No.: 05
ALP7Unexpected ABS operation when using special equipment
(car phone, CB, etc.)
NOTESOnly address this customer complaint after a complete check with the diagnostic tool.
Check that the equipment which is causing the fault is approved.
Check that this equipment was correctly installed without modification of the original wiring, in particular that of
the ABS/ESP.
Connections to earth and to the ABS/ESP supply are forbidden.
ESP_V05_ALP7
