TROUBLESHOOTING AND ELECTRICAL SYSTEM
Test Procedures
2001 Pioneer 900 Gasoline Vehicle Maintenance and Service Manual Page 11-35
11
TEST PROCEDURE 16 – IGNITION COIL
Read DANGER and WARNING on page 11-1.
1. Place the Forward/Reverse handle in the NEUTRAL position, chock the wheels and disconnect the bat-
tery, negative cable first.
2. Using a multimeter set to 200
Ω
(ohms), measure the primary coil resistance.
2.1. Disconnect both of the bullet terminals at the RPM limiter. Place the black (–) probe of the meter
on the male bullet terminal of the wire connecting to the coil under the fan housing, and place the
red (+) probe on a clean unpainted surface of the engine or frame (Figure 11-40, Page 11-34).
2.2. If the resistance is not between 0.6 - 1.7
Ω
(ohms), remove the coil from the engine. See Ignition
Coil Removal, Section 12, Page 12-25. Retest with a multimeter set to 200
Ω
(ohms). Place the
black (–) probe of the meter into the terminal on the coil (1), and place the red (+) probe on the
core (2) (Figure 11-41, Page 11-35). If the resistance is still not between 0.6 - 1.7
Ω
(ohms),
replace the coil.
3. Using a multimeter set to 20k
Ω
(ohms), measure the secondary coil resistance.
3.1. Remove the spark plug wire from the spark plug. Place the red (+) probe of the meter into the end
of the spark plug wire and place the black (–) probe on a clean, unpainted surface of the engine or
frame.
3.2. If the resistance is not between 6.0k - 11.0k
Ω
(ohms), remove the coil from the engine. See Igni-
tion Coil Removal, Section 12, Page 12-25. Retest with a multimeter set to 20k
Ω
(ohms). Place
the black (–) probe of the meter on the core (2), and place the red (+) probe into the end of the
spark plug wire (3) (Figure 11-42, Page 11-35). If the resistance is not between 6.0k - 11.0k
Ω
(ohms), replace the coil.
4. These tests will find most of the bad coils. Some coils may bench test okay but fail under a load due to
heat while operating. Another method of testing is to replace the coil and then run the engine. If the
engine runs properly, keep the new coil in the circuit.
Figure 11-41 Test Ignition Primary Coil
Figure 11-42 Test Ignition Secondary Coil
2m
20
m
200
m
2k
200
200
200
200
20
2
200
m
500
20k
200k
2000
k
Ω
Ω
1000
OFF
WAVETEK
5XL
V
V
V
A
!
!
COM
200nA
MAX
1000 ---
750V
FUSED
PRIMARY COIL
2
1
2m
20
m
200
m
2k
200
200
200
200
20
2
200
m
500
20k
200k
2000
k
Ω
Ω
1000
OFF
WAVETEK
5XL
V
V
V
A
!
!
COM
200nA
MAX
1000 ---
750V
FUSED
2
3
SECONDARY COIL
