Section 08
ELECTRICAL
Sub-Section 06
(MPEM (MULTI-PURPOSE ELECTRONIC MODULE))
08-06-4
RPM Limiter
If maximum engine’s speed is not limited to 7000
RPM, check the connection of BLACK
/
RED
/
GREEN wire (additional BLACK
/
RED wire for port
(LH) side of Speedster). Otherwise, replace the
MPEM.
Gauge Supply Outlet
Gauge supply, as well as beeper supply, come
from the MPEM via a relay. If this outlet malfunc-
tions, check the gauge fuse (on MPEM) first.
Measure the voltage between the gauge outlet
and a ground (ensure ground is perfect). It should
be 12
Vdc. Otherwise, the MPEM is faulty (possi-
bly the gauge relay).
If gauge outlet supplies 12
Vdc, check the wire
position of PURPLE, PURPLE
/
TAN and PURPLE
/
GREY wires in the electrical box connector (see
wiring diagram). To check harness, disconnect it
from electrical box. Check continuity between
ends of wires (see wiring diagram).
Monitoring Beeper
If beeper does not emit diagnostic codes any-
more, while the MPEM gauge supply outlet
works, check if beeper functions well, as follows
:
1. Access 33-second temporization mode.
2. Disconnect engine overheating sensor wire
(any wire on
Speedster
).
3. Ground the disconnected wire.
4. Beeper should be functional. Otherwise, check
wiring harness. Also check the beeper by sup-
plying an external 12
Vdc directly to its harness.
Polarity is mandatory. Connect the positive sup-
ply wire to the PURPLE
/
TAN wire.
Overheat Sensor
In order to check the engine’s overheat sensor
wires, proceed as for beeper.
Accessories
If an accessory does not work, first check acces-
sory fuse (on MPEM). It is also possible to check
the operation of an accessory by connecting it di-
rectly to an external 12
Vdc source. Unplug the 2-
wire connector from the fuse block (in front stor-
age compartment). Check the voltage with the
meter + probe connected to the RED wire and the
– probe to the BLACK wire. The voltage should be
of 12 Vdc. If there is no voltage, check the sepa-
rate 20 A fuse in the electrical box (engine com-
partment).
If everything above is good, disconnect the large
connector from the fuse block. Using a voltmeter,
take a reading of the fuse block outlet correspond-
ing with the faulty accessory (see chart below).
If there is voltage at the fuse block outlet, problem
originates from harness. Check connector wire
position, as well as wires continuity in the har-
ness. Refer to wiring diagram.
Switches can be checked using an ohmmeter.
When switch is activated, resistance should be
below 1
W. When switch is deactivated, resis-
tance should be infinite. The following chart
shows switch connections for each accessory.
ACCESSORY
COLOR
VOLTMETER
TEST
PROBE
+
VOLTMETER
TEST
PROBE
-
Pump
BROWN /
ORANGE
Connector’s
pin no. 21
Ground
Nav / Anc
GREY /
ORANGE
Connector’s
pin no. 18
Ground
Auxiliary
supply (for
additionnal
accessory
ORANGE
Connector’s
pin no. 16
Ground
Blower
YELLOW /
ORANGE
Connector’s
pin no. 17
Ground
Summary of Contents for Challenger 5896
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Page 2: ......
Page 3: ...219 100 044 0 0 0 1996 Shop Manual 0 R ...
Page 152: ...Section 08 ELECTRICAL Sub Section 03 IGNITION SYSTEM 08 03 2 ELECTRICAL BOX Sportster F04H11S ...
Page 154: ...Section 08 ELECTRICAL Sub Section 03 IGNITION SYSTEM 08 03 4 ELECTRICAL BOX Speedster F04H26S ...
Page 251: ...Section 11 HULL DECK Sub Section 01 COMPONENTS 11 01 5 F04L3IS Loctite 242 ...
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