38C-59
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$102.mif
ANTI-LOCK BRAKING SYSTEM
Fault finding – Interpretation of faults38C
Bosch 8.1 ESP
Vdiag No.: 05
DF189
PRESENT
OR
STOREDCOMBINED SENSOR CIRCUIT
NOTESUse Wiring Diagram Technical Note, New Twingo.
Check the condition and position of fuse F10 (5 A) in the passenger compartment fuse box (see 81C, Fuse
box).
Check the connection and condition (possible wiring damage) of the connectors of components 1175,1094 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.
Check the connection and condition (possible wiring damage) of intermediate connector R107.
If the connector is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the connector, otherwise replace the wiring.
Connector of components 1175, 1094, 1016 and intermediate union R107 disconnected.
–check the insulation and continuity of connection AP5 between components 1175 and 1016.
–check the insulation and continuity of connection AP5 between component 1094 and intermediate connector
R107.
–check the insulation and continuity of connection MAM of component 1175 (tightness, oxidation, etc.).
If the connection or connections are faulty (see Technical Note 6015A, Electrical wiring repair, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
ESP_V05_DF189
38C-60
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$102.mif
ANTI-LOCK BRAKING SYSTEM
Fault finding – Interpretation of faults38C
Bosch 8.1 ESP
Vdiag No.: 05
DF190
PRESENT
OR
STOREDCOMBINED SENSOR
1.DEF: Sensor internal electronic fault
2.DEF: Sensor incorrectly fitted
3.DEF: Abnormal voltage
NOTESUse the Wiring Diagram Technical Note for New Twingo.
1.DEF
NOTESNone.
Replace component 1175 (see MR 411 Mechanical, 38C, Anti-lock braking system, Lateral acceleration and
yaw speed sensor, Removal - Refitting) then it is essential to clear the ESP sensor offsets using command
RZ011 Sensor offsets.
2.DEF
NOTESNone.
Check the connection and condition (possible wiring damage) of the connector of component 1094.
Check the connection and condition (possible wiring damage) of the connector of component 1175.
Check the connection and condition (possible wiring damage) of intermediate connector R107.
If the connector is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the connector, otherwise replace the wiring.
Check the continuity of connections 4AP and 4AH between components 1094 and 1175.
If the connection or connections are faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
Check that component 1175 is fitted and attached correctly (the arrow indicates the front of the vehicle).
ESP_V05_DF190
38C-66
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$102.mif
ANTI-LOCK BRAKING SYSTEM
Fault finding – Interpretation of faults38C
Bosch 8.1 ESP
Vdiag No.: 05
DF300
PRESENT
OR
STOREDPUMP MOTOR CONTROL CIRCUIT
DEF: Abnormal voltage.
NOTESUse the Wiring Diagram Technical Note for New Twingo.
Check the tightness and condition of the battery terminals (see 80A, Battery).
Check the charging circuit (see 16A, Starting - Charging).
Check the condition and position of fuse F1 (40A) and F2 (30A) in the engine fuse box
(see 81C, Fuse box).
Check the connection and condition (possible wiring damage) of the connectors of components 1094, 1834,
1016 and intermediate connector R107.
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 connector of component 1094 disconnected, check the insulation and continuity of connections MAH
of component 1094 (tightness, oxidation, etc.).
Connectors of components 1094, 1175, 583 and intermediate union R107 disconnected,
–check the insulation and continuity of connection AP5 between component 1094 and intermediate
connector R107.
–Check the insulation and continuity of connection AP5 between intermediate connector R107 and
component 1016.
–Check the insulation and continuity of connection BP14 between components 1094 and 1834.
–Check the insulation and continuity of connection BP8 between components 1094 and 1834.
If the connections are faulty (see Technical Note 6015A, Electrical wiring repair, Wiring: Precautions for
repair), repair the wiring, otherwise replace it.
ESP_V05_DF300
38C-72
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
V3 MR-413-X44-38C050$130.mif
38C
Bosch 8.1 ESP
Vdiag No.: 05
ET017BRAKE PEDAL
NOTESSpecial notes:
Only carry out the checks if the PRESSED and RELEASED statuses are inconsistent
with the pedal position.
Use the Wiring Diagram Technical Note for New Twingo.
"Released" STATUS Brake pedal depressed.
If the brake lights are working:
With the connectors of components 1094, 160, intermediate union R107 and component 119 disconnected
(depending on equipment), check the continuity of connection 65A between components 160 and 1094.
If the connection is faulty (see Technical Note 6015A, Electrical wiring repair, Wiring: Precautions for repair),
repair the wiring, otherwise replace it.
If the brake lights are not working:
–Check the condition, fitting and the adjustment of component 160 as well as the conformity of the bulbs.
–Remove (see MR 411, Mechanical, 37A, Mechanical component control, Brake light switch: Removal -
Refitting) and test the operation of component 160:
Continuity between tracks Insulation between tracks
Switch engaged
(Brake pedal released)AP10 and 5A AP10 and 65A
Switch released
(Brake pedal depressed)AP10 and 65A AP10 and 5A
Replace component 160 if necessary.
Check the condition and position of fuse F5 (15A) (see 81C, Fuse box).
Check for +12 V after ignition feed on connection AP10 of component 1016 to the earth MAH.
With intermediate connector R107 and component 160, 1281 and 1081 disconnected (depending on equipment):
–Check the continuity and insulation of connection AP10 between component 1016 and intermediate
connector R107.
–Check the continuity and insulation of connection AP10 between component 160 and intermediate
connector R107.
ESP_V05_ET017
ANTI-LOCK BRAKING SYSTEM
Fault finding – Interpretation of statuses
38C-75
AFTER REPAIRClear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
V3 MR-413-X44-38C050$130.mif
ANTI-LOCK BRAKING SYSTEM
Fault finding – Interpretation of statuses38C
Bosch 8.1 ESP
Vdiag No.: 05
ET023ESP ON/OFF BUTTON
NOTESSpecial notes:
Apply the checks only if the PRESSED and RELEASED statuses are not consistent
with the position of the ESP on/off button (RS version only)
Use the Wiring Diagram Technical Note for New Twingo.
PRESSED STATUS
Connector of component 1106 disconnected and without action on the component.
Check that there is no continuity between connections MAM and 4AQ of component 1106.
Otherwise, replace component 1106.
Check the connection and condition (possible wiring damage) of the connectors of components 1106, 1094.
Check the connection and condition (possible wiring damage) of intermediate union R107.
If the connector is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the connector, otherwise replace the wiring.
Connector of components 1106 and 1094 and intermediate union R107 disconnected,
Check the insulation of connection 4AQ between component 1106 and intermediate union R107.
Check the insulation of connection 4AQ between intermediate union R107 and component 1094.
If the connection is faulty (see Technical Note 6015A, Electrical wiring repair, Wiring: Precautions for repair),
repair the wiring, or replace it.
If the fault is still present, contact the Techline.
ESP_V05_ET023
38C-87
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
ALP1 No dialogue with the ABS/ESP computer
NOTESOnly address this customer complaint after a complete check with the diagnostic tool.
Use the Wiring Diagram Technical Note for New Twingo.
Try to establish dialogue with an ESP computer on another vehicle to make sure that the diagnostic tool is not
faulty. If the tool is not at fault, and dialogue cannot be established with any other computer on the same vehicle,
the cause could be a faulty computer interfering on the multiplex network.
Check the tightness and condition of the battery terminals (see 80A, Battery).
Check the charging circuit (see 16A, Starting - Charging).
Check that the power supply to the diagnostic socket is correct:
Check for + 12 V on connection BP19 of component 225.
Check for earth on connections MAM and NAM of component 225.
If the connections are faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise replace it.
Apply the fault finding procedure for specification 1. DEF of fault DF001 Computer supply.
Carry out fault finding on the multiplex network using the diagnostic tool (see 88B, Multiplexing).
If dialogue has still not been established after these checks, contact Techline.
ESP_V05_ALP1
ANTI-LOCK BRAKING SYSTEM
Fault finding – Fault finding chart