Yamaha XT660R S Service Manual page 443

4. Voltage
• Connect the pocket tester (DC 20 V) to the
immobilizer unit coupler as shown.
Positive tester probe → red/white 1
Negative tester probe → black 2
2
B BB R/G
Y/L G/L R/W
1
• Set the main switch to "ON".
• Measure the voltage (12 V) between red/
white and black on the immobilizer unit
coupler.
• Is the voltage within specification?
YES
IMMOBILIZER SYSTEM
R/G B2 B
R/W Lg Y/L
NO
The wiring circuit
from the main switch
to the immobilizer
unit is faulty and
must be repaired.
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5. Voltage
• Connect the pocket tester (DC 20 V) to the
immobilizer unit coupler as shown.
Positive tester probe → green/blue 1
Negative tester probe → black 2
2
B BB
Y/L G/L R/W
• Set the main switch to "ON".
• Measure the voltage (2.6 V) between
green/blue and black on the immobilizer
unit coupler.
• Is the voltage within specification?
The wiring
from the immobilizer
unit to the meter
assembly is
and must
repaired.
8 - 60
ELEC
R/G R/G B2
R/W Lg Y/L
1
YES
circuit Replace the immobi-
lizer unit.
faulty
be
– +
B
NO