Checking Coil Resistance - Suzuki DF 25 Service Manual

CHECKING COIL RESISTANCE

Always disconnect the battery cable from battery be-
fore commencing electrical resistance check.
IGNITION COIL
09930-99320 : Digital tester
Tester range :
Primary side
1. Disconnect primary coil lead wires from CDI unit.
2. Connect tester probe to coil lead wires as shown.
Ignition coil
No.1
No.2
No.3
3. Measure resistance.
Primary coil resistance : 0.17 – 0.23
If measurement exceeds specification, replace ignition coil.
Secondary side
1. Remove spark plug cap from high tension cord.
2. Connect tester probe to Black coil lead wire and high tension
cord as shown.
Ignition coil
No.1
No.2 High tension cord
No.3
3. Measure resistance.
Secondary coil resistance : 3.3 – 5.0 k
If measurement exceeds specification, replace ignition coil.
(Resistance)
Tester probe connection
Red (+)
White
Tester probe connection
Red (+)
Black (–)
Black
Black (–)
Black
ENGINE CONTROL 3-7
Black
Black
White
White
H . T cord