Section 06 ELECTRICAL SYSTEM
Subsection 01 (IGNITION SYSTEM)
IGNITION SYSTEM
SERVICE TOOLS
Description
Part Number
Page
Fluke 111 multimeter ........................................................... 529 035 868 ......................... 259, 261–263
ECM adapter tool.................................................................. 529 036 085 ......................................... 262
SERVICE PRODUCTS
Description
Part Number
Page
Super lube ............................................................................ 293 550 030 ......................................... 265
heat sink paste ..................................................................... 420 897 186 ......................................... 265
GENERAL
IGNITION SYSTEM OPERATION
The battery supplies 12 Vdc from fuse F3, to the
primary side of the ignition coil. The ECM com-
pletes the circuit by switching it to ground at the
right moment.
As the engine rotates, a signal from the CPS
(crankshaft position sensor) relative to the po-
sition of the piston in the cylinder, is produced
and sent to the ECM. The ECM uses this signal
as well as engine RPM to establish the exact
moment at which the ignition spark is required. It
then provides the ground to the primary winding
of the ignition coil.
With the ground provided by the ECM, current
flows through the primary coil winding which in-
duces a higher current potential in the secondary
winding. This high current potential jumps across
the spark plug gap and ignites the fuel/air mixture
within the cylinder.
Ignition Timing
Ignition timing is not adjustable.
TROUBLESHOOTING
IGNITION SYSTEM TESTING
NOTE:
It is good practice to check for fault codes
using B.U.D.S. software as a first troubleshoot-
ing step. Refer to
MONITORING SYSTEM/FAULT
CODES
subsection.
The ECM controls the ignition system and can de-
tect an open or short circuit in the ignition coil pri-
mary winding. However, it does not monitor the
secondary winding.
Ignition Testing Sequence
Set engine stop switch to RUN.
Turn the ignition switch to the ON position.
No Multifunction Gauge and Taillight
If the multifunction gauge and taillight do not func-
tion, the ECM may not be powered. Check the
following:
30 A main fuse (F8)
vmr2008-139-015_a
1. Main fuse (F8)
2. Spare fuse
3. Fan/accessories fuse (F9)
5 A ECM fuse (F1)
vmr2008-137
257
Содержание Outlander 400 EFI 2008
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