ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults87G
87G - 46V7 MR-372-J84-87G050$385.mif
UPC
Vdiag No.: 48, 4C ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults
DF026
PRESENT
OR
STOREDAUTOMATIC GEARBOX SUPPLY
CC.0 : Short circuit to earth
CC.0
NOTESSpecial note:
To display this fault as present or stored, run command
AC016 Electrical supply circuits test.
Use Wiring Diagrams Technical Note for Mégane II or
Scénic II.
Check that UPC fuse F16 (5A) is correct.
Check the insulation, continuity and the absence of interference resistance on the following connection:
–AP4, between components 1337 and 119.
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.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Electrical supply circuits test.
Clear the computer fault memory, switch the + after ignition supply off and back on, and
run another check with the diagnostic tool.
USM_V48_DF026/USM_V4C_DF026
MR-372-J84-87G050$385.mif
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Fault finding charts87G
87G-90V7 MR-372-J84-87G050$880.mif
UPC
Vdiag No.: 48, 4CENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Fault finding charts
ALP1 No dialogue with the computer
NOTESRun a complete multiplex network check using the diagnostic tool.
Check the condition and connection of the connectors and fuses on the Protection
and Switching Unit.
Use Wiring Diagrams Technical Note for Mégane II or Scénic II.
Try the tool on another vehicle.
Check the voltage of the battery.
Check the condition and connection of the battery fuse box fuses and terminals.
Replace the defective fuse.
If the connection is defective and there is a repair method (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for + 12 V on the screwed-in power terminal of the Protection and Switching Unit.
If the connection is defective and there is a repair method (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for earth on connection codes MAS and NAM of connector CM of the Protection and Switching Unit,
component code 1337.
If any of the connections are defective and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for a + 12 V battery on connection code BP32, + 12 V APC on connection code AP43 and an earth on
connection codes NAM and MAM of the diagnostic socket.
If any of the connections are defective and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
If dialogue with the computer is still not possible, contact the Techline.
AFTER REPAIRCheck that no fault is present.
USM_V48_ALP1 /USM_V4C_ALP1
MR-372-J84-87G050$880.mif
