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DTC 15-02: 4WD SELECTABLE
SYSTEM COMMUNICATION LINE
VOLTAGE (REGULAR DIAGNOSIS)
NOTE:
•
Before starting the troubleshooting, check the
connectors for loose contacts or corroded termi-
nals, and recheck the DTC .
•
Question the customer about the
conditions
when the problem occurred, and try to reproduce
the same conditions for troubleshooting. Find
out when the 4WD indicator came on, such as
during 4WD to 2WD selecting, 2WD to 4WD
selecting, at what speed, etc.
1.
Combination
Meter Inspection
Check that the combination meter functions
properly_
Does
the combin8tion
function
properly?
NO
- Perform the combination meter inspec-
tion
(page 22-8).
YES
- GO
TO
STEP 2.
2.
EPS ECU
system
inspection
1. Erase the OTC with HOS or DLe (page 25-11).
2. Start the engine.
3. Check the EPS indicator.
DaBs the indicator
come on?
NO
- System
is
normal at this time
YES
-
GO TO STEP 3.
3.
4WO indicator Inspection
1. Turn the
ignition
switch ON.
2. Start engine.
3. 2WD/4WD select switch to
4WD,
and check
that the 4WD indicator.
Does
the 4WD
indicator come on?
YES
- GO
TO
STEP 4.
NO
-
GO
TO
STEP 5.
4.
4WO INDO Line Open
Circuit
Inspection
Remove the front fender (page 2-11)
Disconnect the EPS ECU 21 P gray A connector.
With the ignition switch turned to ON, measure
the voltage between the Brown/white wire termi-
nal of
the
wire harness side of the EPS ECU 21 P
gray A connector and body ground.
Connection
:
Brown/white
(+)
-
Body
ground (-)
TOOL:
Pin
probe
(Male)
07ZAJ-ROJA1'O
J
s
th ttre
sbove 5V?
ELECTRIC POWER STEERING (EPS)
EPS ECU 21 P A CONNECTOR
(Viewed
from terminal side)
1+1
1-1
YES
-
Recheck for poor contact
or
loose con-
nection
i
n
the wire harness. If they are
L
_ _ _ _ _ _ _ _ _
__ _ _ _ _ _ _ -'
OK, replace the EPS ECU with a new
one (page 25-37),
NO
- GO
TO
STEP 5.
- - - - - - - - - - - - - - - - -
-/
,
J
-2,
. .
.
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