Section 06: ELECTRICAL
PA1562
26
4.7 TROUBLESHOOTING
Problem/Symptom Probable Causes Actions
Rear Start selector switch is
not in the NORMAL position
Master cut-out switch in the
rear electrical compartment
is in the OFF position (down)
1. Check that the rear start selector
switch is flipped up to NORMAL start
position and master cut-out switch is
flipped up to ON and retry cranking
2. Flip the rear start selector switch to
“Rear Start” and start the vehicle from
the rear
Vehicle does not Start
CAN network problem
(Multiplex)
Module A53 not powered or
is defective
Engine MCM does not
receive the ignition signal
Engine MCM is not powered
If the vehicle does not start from the rear:
1. Verify that module A53 is powered:
a) Check the SYSTEM DIAGNOSTIC
menu of the message center
display (MCD). Select FAULT
DIAGNOSTIC and ELECTRICAL
SYSTEM. The message “No
Response ModA53, Active”,
indicates a power problem on the
module or a CAN network problem.
b) Check / reset circuit breaker CB5
c) Check / replace fuse F65
d) Probe gray connector on module to
see if it is powered.
2. Verify that the engine MCM 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)
Three dashes “---“ appear
in the telltale panel
instead of the outside
temperature
Note: The sunshades are
still functioning since
these are not multiplexed
The program version in the
CECM is different than the
program in the I/O modules
and the CECM is forcing all
I/O modules to stay inactive
1. Engage the auto-programming of the
I/O modules: Turn the ignition key to
the OFF position, flip the master cut-
out switch in the rear electrical
compartment to OFF and ON and
then turn the ignition key 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 CECM and
reconnect
3. If step 1 and 2 are ineffective, try
disconnecting the Master ID module
completely and repeat step 1
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