Section 06: ELECTRICAL
PA1593
22
Problem/Symptom
Probable Causes
Actions
Engine ECM is not powered
2. Verify that the engine ECM is
powered and get the ignition signal
a) Check / reset circuit breaker CB8
Check / replace fuse F74
b) Check / reset circuit breaker CB2
Check / replace fuse F78
None of the Multiplexed
functions are operating,
including the basic limp-
home functions (door
opening, flashers, wipers
in speed 1)
Note: The sunshades are
still functioning since
these are not multiplexed
The program version in the
MCM is different than the
program in the I/O modules
and the MCM is forcing all
I/O modules to stay inactive
1. Engage the auto-programming of the
I/O modules: Turn the ignition switch
to the OFF position, flip the master
cut-out switch on the rear electrical
panel to OFF and ON and then turn
the ignition switch back ON. The
letters CAN will appear in the telltale
LCD panel for about 3 minutes
Everything shall get back to normal
once the letters CAN are replaced
with outside temperature display
2.
Try disconnecting the green
connector on the MCM and reconnect
3.
Try disconnecting the MCM
completely, leave it disconnected and
see if the limp-home functions (start
of the vehicle from the engine
compartment, wipers speed 1,
flashers, etc ) are functioning
Many secondary functions
(not essential for driving)
not functioning (interior
lighting, driver's area
lighting, wiper speed 2
and intermittent).
Marker lights and
clearance lights are
turned ON when setting
ignition to the ON
position.
The MCM module does not
receive 24 V power.
The CAN network is not
working. It could be caused
by a short on the network, an
open circuit, a problem with
the MCM or the MCM being
disconnected from the
network.
1. Check / reset circuit breaker CB6 (3
rd
from the left on the junction panel)
Check / replace fuse F1
2. Operate in limp-home mode by
starting the vehicle from the engine
compartment (REAR START). All
functions essential to drive are
available
To close and lock the door, pull the door
manually up to its closed position and it
will lock by itself. The door opening button
is still functioning
Entrance door does not
open nor close using the
control buttons
Defroster fan not
functioning
Windshield wipers not
functioning in speed 1 or
intermittent
Module A47 is not powered
or is faulty
1. Check the
Diagnostics
menu of
Driver Information Display (DID).
Select
Fault Diagnostics
and
Electrical System
. The message “No
Response ModA47, Active” indicates
a power problem on the module. (A
CAN network problem would show
the same message but doesn't
produce these symptoms).
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