Allow engine to cool before performing
troubleshooting maintenance. If necessary
use insulated pads and gloves. Hot engine
components will burn and cause injury to
Remove all jewelry such as rings, dog tags,
bracelets, etc. If jewelry or tools contact
positive electrical circuits, a direct short
may result. Damage to equipment, injury or
death to personnel may occur.
(1) Set multimeter select switch to
(2) Connect positive (+) multimeter lead
to vehicle harness connector MC18,
(3) Connect negative () multimeter lead
to a known good ground.
(4) Turn ON ENGINE switch
(5) Are there 4 to 6 vdc present
between wire 451 at vehicle harness
connector MC18, terminal E1 and a
known good ground?
(a) If less than 4 vdc are present,
turn OFF ENGINE switch and
repair wire 451 (see schematic
Fig 2-1) or notify DS Maintenance.
(b) If 4 to 6 vdc are present, turn
OFF ENGINE switch and go to
Step 6 of this Fault.