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SELECTABLE 4WD SYSTEM
BEFORE STARTING
TROUBLESHOOTING
SELF-DIAGNOSTIC FUNCTION
The engine
control
module (EeM) that
controls
the
Selectable 4WD system has a
self-diagnostic
func-
tion to constantly monitor the system. The ECM
checks
the
condition of the Selectable 4WD system
by
detecting
the Signals from each sensor and
device when the ignition switch is ON and during
driving. When the ECM detects a problem in the sys-
tem, the ECM overrides the 4WD selector switch,
puts the machine
into
2WD, and 4WD cannot be
used.
•
When the ECM detects a
problem,
it
indicates the
, - - - - - - - - - - - - -
-- - - - ,
problem by blinking
the
4WD indicator.
4WD INDICATOR
Note how many times the indicator
blinks,
deter-
~
mine the detection item (page 23-4) and perform
the troubleshooting
(page
23-5).
•
Only
one current
problem code will be indicated
even
if
two or more problems occur.
•
Once the ECM detects a problem, it stores the
problem code in the erasable memory. It can be
indicated
as freeze code by retrieval of
problem
code
(Retrieval
and erasure procedure are the
same as the Hondamatic ones, refer to page
®
"
®
®
,,::::8
24-9.
-
-
-
...
.,
83'1
-
,/
:.J
10
.... '-1_
0
1,1-
8----c
as,"
# ,
•
The selectable 4WD function can be reset by
turning the
ignition
switch OFF and ON, but the
4WD selector stops functioning when the ECM
' - - - - - - - -
-- - - - - - - - - - - "
detects the problem again.
•
After performing troubleshooting, erase the
problem code(s) and test-drive the vehicle to be
sure that the problem(s) has/have been
repaired.
PROBLEM CODE BUNKING
PATTERN:
"--"
ON
3
sec.
1
sec.
'----_.:'-'
"
,
,
1 sec.
~,
,
'
OFF
.-------
'
-,
One Blink
:-.-----:
Current problem code
(Example: Blinking 3 times
::::
Problem
code 3)
1
sec.
.
.
,
,
-
,
Pattern
repeated
PROBLEM CODE INDEX
Problem
Det ection item
Refer
t
o
code
2
Front vehicle speed sensor (VSS) circuit
(no
signal)
23-5
3
Rear
vehicle speed sensor
(VSS)
circuit
(no
signal)
23-1
4
Syst
em voltage (out of specified value)
23-9
5
Front final clu
t
ch system circuit malfunction
23-9
23·4
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