17C-5
MR-372-J84-17C000$059.mif
V2
GAS INJECTION
Fault finding - Introduction
LPG 3000
Program No: AB
Vdiag No: 08/10
17C
4. FAULT FINDING PROCEDURE (continued)
Wiring check
Fault finding problems
Disconnecting the connectors and/or manipulating the wiring harness may temporarily remove the cause of a fault.
Electrical measurements of voltage, resistance and insulation are generally correct, especially if the fault is not
present when the analysis is made (stored fault).
Visual inspection
●look for damaged wiring under the bonnet and in the passenger compartment.
●carefully check the fuses, insulation and the correct routing of the wiring.
●look for signs of oxidation.
Tactile inspection
While manipulating the wiring harness, use the diagnostic tool to note any change in fault status from stored to
present.
●Make sure that the connectors are properly locked.
●Apply light pressure to the connectors.
●Twist the wiring harness.
If there is a change in status, try to locate the source of the fault.
Inspection of each component
●disconnect the connectors and check the appearance of the clips and tabs, as well as the crimping (no
crimping on the insulating section).
●make sure that the clips and tabs are properly locked in the sockets.
●Check that no clips or tabs have been dislodged during connection.
●check the clip contact pressure using an appropriate model of tab.
Resistance check
●check the continuity of the entire lines, then section by section.
●look for a short circuit to earth, to + 12V or with another wire.
If a fault is detected, apply the associated fault finding procedure and repair or replace the wiring.
