Checking The Differential Motor Position Switch; Checking The Eps Motor (For Eps Models) - Yamaha Wolverine YX70EPNG Service Manual

EBS30318
CHECKING THE DIFFERENTIAL MOTOR
POSITION SWITCH
1. Check:
• Differential motor position switch
Out of specification → Replace.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
TIP
Check the differential motor position switch for
continuity between the terminals "1" and "3" and
between the terminals "2" and "3" when the On-
Command four-wheel-drive switch is set to the
"2WD", "4WD", and "DIFF LOCK" positions.
2WD position
No continuity
(between "1" and "3")
(between "2" and "3")
4WD position
Continuity
(between "2" and "3")
No continuity
(between "1" and "3")
DIFF LOCK position
Continuity
(between "1" and "3")
No continuity
(between "2" and "3")
▼ ▼▼▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
a. Turn the main switch to "
b. Set the On-Command four-wheel-drive
switch to "2WD", "4WD", or "DIFF LOCK" po-
sition.
c. Turn the main switch to "
d. Disconnect the differential motor coupler.
e. Connect the pocket tester (Ω × 1) to the differ-
ential motor terminals.
f. Check the differential motor position switch
continuity.
1 2 3
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
" (on).
" (off).
ELECTRICAL COMPONENTS
g. Check the differential motor position switch
no continuity.
▲ ▲▲▲ ▲ ▲▲▲ ▲
EBS30319
CHECKING THE EPS MOTOR (for EPS
models)
1. Remove:
• EPS unit
2. Check:
• EPS motor
Out of specification → Replace the EPS unit.
TIP
The pocket tester and the analog pocket tester
readings are shown in the following table.
2
B
▼ ▼▼▼ ▼ ▼▼▼ ▼
a. Connect the pocket tester (Ω × 1) to the EPS
motor coupler terminal and EPS motor body.
▼▼▼
b. Check the EPS motor for continuity.
c. Check the EPS motor for no continuity.
▲ ▲▲▲ ▲ ▲▲▲ ▲
9-109
▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
Continuity
Positive tester probe → red "1"
Negative tester probe → black
"2"
No continuity
Positive tester probe → red "1"
Negative tester probe → EPS
motor body "3"
No continuity
Positive tester probe → black
"2"
Negative tester probe → EPS
motor body "3"
1
3
R
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
▲ ▲▲▲ ▲ ▲▲▲
▼ ▼▼▼ ▼ ▼▼▼
▲ ▲▲▲ ▲ ▲▲▲