Checking The Relay Unit (Diode); Checking The Ignition Coils - Yamaha XT1200Z(Z) 2010 Service Manual

EAS28050

CHECKING THE RELAY UNIT (DIODE)

1. Check:
• Relay unit (diode)
Out of specification → Replace.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
TIP
The pocket tester and the analog pocket tester
readings are shown in the following table.
Continuity
Positive tester probe → sky blue
"1"
Negative tester probe →
black/yellow "2"
No continuity
Positive tester probe →
black/yellow "2"
Negative tester probe → sky
blue "1"
Continuity
Positive tester probe → sky blue
"1"
Negative tester probe →
black/red "3"
No continuity
Positive tester probe →
black/red "3"
Negative tester probe → sky
blue "1"
Continuity
Positive tester probe → sky blue
"1"
Negative tester probe → sky
blue/white "4"
No continuity
Positive tester probe → sky
blue/white "4"
Negative tester probe → sky
blue "1"
Continuity
Positive tester probe →
blue/green "5"
Negative tester probe →
black/red "3"
No continuity
Positive tester probe →
black/red "3"
Negative tester probe →
blue/green "5"
ELECTRICAL COMPONENTS
M MMM M MMM M M MMM
a. Disconnect the relay unit from the wire har-
ness.
b. Connect the pocket tester (Ω × 1) to the relay
unit terminals as shown.
c. Check the relay unit (diode) for continuity.
d. Check the relay unit (diode) for no continuity.
L LLL L LLL L L LLL
EAS28100

CHECKING THE IGNITION COILS

The following procedure applies to all of the igni-
tion coils.
1. Check:
• Primary coil resistance
Out of specification → Replace.
Primary coil resistance
1.19–1.61 Ω
M MMM M MMM M M MMM
a. Remove the ignition coil from the spark plug.
b. Connect the pocket tester (Ω × 1) to the igni-
tion coil as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
red/black "1"
• Negative tester probe →
Cylinder-#1 left ignition coil
orange "2"
Cylinder-#1 right ignition coil
gray/red "2"
Cylinder-#2 left ignition coil
orange/green "2"
Cylinder-#2 right ignition coil
gray/green "2"
8-147
M M MMM M M MMM M
L L LLL L L LLL L
M M MMM M M MMM M
M MMM M MMM
L LLL L LLL
M MMM M MMM