Page 57 of 138
21B-57
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V2
SEQUENTIAL GEARBOX
Fault finding - Interpretation of faults
Vdiag No: 04
21B
DF148
PRESENT
OR
STOREDSECONDARY BRAKE CONTACT MULTIPLEX SIGNAL
1.DEF : Communication disrupted
2.DEF : Inconsistent signal
NOTESPriorities when dealing with a number of faults:
If fault DF062 Multiplex line fault is present or stored, deal with it first.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after the computer fault memory has been cleared, the
ignition has been switched off and on again and the engine has been started.
Use the Wiring Diagrams Technical Note for New TWINGO.
Run a multiplex network test (see 88B, Multiplex).
Run fault finding on the injection system (see 17B, Petrol injection).
Check for the presence, condition and correct positioning of the 15A fuse for the brake lights in the passenger
compartment fuse box.
Check that the indicator light switches off quickly as soon as the brake pedal moves.
Check the connection and condition of the connectors of components 120 and 160.
If the connectors are faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical
wiring, W iring: Precautions for repair), repair the connectors; otherwise, replace the wiring.
Check the adjustment of the brake light switch on the pedals.
Check for continuity with the pedal depressed, between connections AP10 (track 2) and 65A of component 160.
Replace the switch if necessary (see MR 411 Mechanical systems, 83D Cruise control, Brake light switch:
Removal - Refitting).
Check there is no continuity with the pedal released, between connections AP10 (track 2) and 65A of
component 160.
Replace the switch if necessary (see MR 411 Mechanical systems, 83D Cruise control, Brake light switch:
Removal - Refitting).
Ensure the insulation to + 12 V, to earth and the continuity of the following connections:
●Connection code 3MT,
●Connection code 3MS,
between components 120 and 119.
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.
AFTER REPAIRDeal with any faults detected by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
BVRJH1_V04_DF148
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V2
SEQUENTIAL GEARBOX
Fault finding - Interpretation of faults
Vdiag No: 04
21B
DF150
PRESENT
OR
STOREDINSTRUMENT PANEL MULTIPLEX CONNECTION
1.DEF : No signal
NOTESPriorities when dealing with a number of faults:
If fault DF062 Multiplex line fault is present or stored, deal with it first.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after the computer fault memory has been cleared, the
ignition has been switched off and on again and the engine has been started.
Use the Wiring Diagrams Technical Note for New TWINGO.
Check the connection and condition of the connectors of components 120, 119 and 247.
If the connectors are faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical
wiring, W iring: Precautions for repair), repair the connectors; otherwise, replace the wiring.
Run a multiplex network test (see 88B, Multiplex).
If the multiplex network is correct, perform a fault finding of the instrument panel (see 83A, Instrument panel).
AFTER REPAIRDeal with any faults detected by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
BVRJH1_V04_DF150
Page 59 of 138
21B-59
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V2
SEQUENTIAL GEARBOX
Fault finding - Interpretation of faults
Vdiag No: 04
21B
DF166
PRESENT
OR
STOREDPRESSURE SENSOR CIRCUIT
CO.0 : Open circuit or short circuit to earth
CC.1 : Short circuit to + 12 V
1.DEF : Signal incoherence
NOTESSpecial note:
–Fault warning light comes on.
Use the Wiring Diagrams Technical Note for New TWINGO.
CO.0/ CC.1
NOTESNone
Check the condition and position of the 30 A fuse for the pump in the engine compartment.
Repair if necessary.
Check the connection and condition of the connectors of components 119 and 1059 and the 24 track
intermediate connector located on the hydraulic unit.
If the connectors are faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical
wiring, W iring: Precautions for repair), repair the connectors; otherwise, replace the wiring.
Check the continuity and insulation to earth and + 12 V on the following connections:
●Connection code 5HN,
●Connection code 5HX,
●Connection code 5AD,
between components 119 and 1059.
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 fault is still present, replace the oil pressure sensor on the Sequential gearbox (see MR 411, Sequential
gearbox, solenoid valve unit pressure sensor, Removal refitting).
AFTER REPAIRDeal with any faults detected by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
BVRJH1_V04_DF166
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V2
SEQUENTIAL GEARBOX
Fault finding - Interpretation of faults
Vdiag No: 04
21B
DF166
CONTINUED
1.DEF
NOTESNone
Check the level of oil in the discharged accumulator, refer to the interpretation of command AC081 Discharge
pressure accumulator.
Check the condition and position of the 30 A fuse for the pump in the engine compartment.
Use command AC012 “Hydraulic pump relay” with the diagnostic tool and check that the pump assembly is
working. If the pump is not working, perform the necessary repairs.
If the fault is still present, replace the oil pressure sensor (see MR 411, Sequential gearbox, solenoid valve unit
pressure sensor, Removal refitting).
Switch off the ignition.
Switch on the ignition again and carry out a new check using the diagnostic tool.
Replace the pump assembly if the fault reappears (see MR 411, Sequential gearbox, pump assembly,
Removal refitting).
AFTER REPAIRDeal with any faults detected by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
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V2
SEQUENTIAL GEARBOX
Fault finding - Interpretation of faults
Vdiag No: 04
21B
* FR: frontDF175
DF176
PRESENT
OR
STORED
FRONT LEFT-HAND WHEEL SPEED MULTIPLEX SIGNAL
FRONT RIGHT-HAND WHEEL SPEED MULTIPLEX SIGNAL
1.DEF : Communication disrupted
NOTESPriorities when dealing with a number of faults:
If fault DF062 Multiplex line fault is present or stored, deal with it first.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after a road test.
Special note:
–“FR left-hand wheel speed multiplex signal” = Front left-hand wheel speed
multiplex signal.
–“FR right-hand wheel speed multiplex signal” = Front right-hand wheel speed
multiplex signal.
Use the Wiring Diagrams Technical Note for New TWINGO.
Run a multiplex network test (see 88B, Multiplex).
Check the connection and condition of the connectors of components 120, 1094 and 119.
If the connectors are faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical
wiring, W iring: Precautions for repair), repair the connectors; otherwise, replace the wiring.
Run fault finding on the ABS computer (see 38C, Anti-lock braking system).
AFTER REPAIRDeal with any faults detected by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
BVRJH1_V04_DF175 / BVRJH1_V04_DF176
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V2
SEQUENTIAL GEARBOX
Fault finding - Interpretation of faults
Vdiag No: 04
21B
DF180
PRESENT
OR
STOREDHYDRAULIC PUMP
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared as present if:
–The pump is switched off for 10 seconds.
–If the oil pressure is less than the starting value.
Special note:
–Fault warning light comes on.
Use the Wiring Diagrams Technical Note for New TWINGO.
Check for + AVC on connection BP36 of component 762.
If there is no + AVC, check fuse F1 30A on component 597.
If the fuse is correct, check the continuity of connection BP36 between components 762 and 597.
If the fuse is not correct, check the insulation to earth of connection BP36 between components 762 and 597.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
wiring: precautions for repair), repair the wiring, otherwise replace it.
Check the connection and condition of the connectors of components 724, 119 and 762.
Also check the connection and condition of the 24-track intermediate connector located on the hydraulic unit.
If the connectors are faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical
wiring, W iring: Precautions for repair), repair the connectors; otherwise, replace the wiring.
Check the continuity and insulation of the following connections:
●Connection code M between component 724 and earth MS-99E,
●Connection code 5AE between components 762 and 724,
●Connection code 5AF between components 119 and 762.
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.
Case of excessive pump operation:
–Internal or external leak in the circuit. For an external leak, locate the leak and repair if necessary. If there is an
internal leak, replace the hydraulic unit (see MR 411, Sequential gearbox, Electro-hydraulic unit: Removal -
Refitting).
If the fault is still present, replace the accumulator (see MR 411, Sequential gearbox, Pressure accumulator:
Removal - Refitting).
AFTER REPAIRDeal with any faults detected by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
BVRJH1_V04_DF180
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V2
SEQUENTIAL GEARBOX
Fault finding - Interpretation of faults
Vdiag No: 04
21B
DF181
PRESENT
OR
STOREDGEAR SELECTION IMPOSSIBLE
1.DEF : Impossible to select gear
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after an engine start attempt and an attempt to engage a
gear.
Special note:
–Fault warning light comes on.
–Neutral engaged immediately.
Check that there are no engagement or selection sensor faults.
If faults associated with these components are present, deal with these first.
Check that the selection control lever is correctly clipped to the hydraulic unit (see MR 411, 21B, Sequential
gearbox).
Carry out the necessary repairs.
Check that there is no water in the sequential gearbox oil.
Repair if necessary.
Clear the computer fault memory using command RZ001 "Stored fault(s)".
Carry out the programming procedure for the "Hydraulic unit - gearbox kit (without
clutch) or Clutch or gearbox + Clutch" (see "Replacement of components").
If the fault is still present, contact the Techline.
AFTER REPAIRDeal with any faults detected by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
BVRJH1_V04_DF181
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V2
SEQUENTIAL GEARBOX
Fault finding - Interpretation of faults
Vdiag No: 04
21B
DF185
PRESENT
OR
STOREDNO ABS/ESP MULTIPLEX SIGNAL
1.DEF : No signal
NOTESPriorities when dealing with a number of faults:
If fault DF062 Multiplex line fault is present or stored, deal with it first.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after the computer fault memory has been cleared, the
ignition has been switched off and on again and the engine has been started.
Use the Wiring Diagrams Technical Note for New TWINGO.
Perform a multiplex network test (see 88B, Multiplex).
Check the connection and condition of the connectors of components 120, 119 and 1094.
If the connectors are faulty and if there is a repair method (see Technical Note 6015A, Repairing electrical
wiring, W iring: Precautions for repair), repair the connectors; otherwise, replace the wiring.
If the fault is still present, run fault finding on the ABS/ESP system (see 38C, Anti-lock braking system).
AFTER REPAIRDeal with any faults detected by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
BVRJH1_V04_DF185
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