Ignition Coil Removal/Installation; Ignition Coil Inspection; Ignition Coil With Built-In Igniter Inspection - Mazda CX-7 2007 Workshop Manual

IGNITION COIL REMOVAL/INSTALLATION[L3 WITH TC]
1. Disconnect the negative battery cable.
2. Remove the charge air cooler. (See 01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH TC].)
3. Remove in the order indicated in the table.
4. Install in the reverse order of removal..
1 Connector
2 Ignition coil
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IGNITION COIL INSPECTION[L3 WITH TC]

Ignition Coil Inspection

1. Perform the spark test and identify the malfunctioning cylinder.
2. Replace the ignition coil of the malfunctioning cylinder with that of a normal cylinder, and reperform the spark
test.
• If the spark is not normal due to a malfunctioning ignition coil, replace that ignition coil.
• It is unlikely that all four ignition coils fail to operate properly. To prevent replacing a normal component,
perform the above procedure, identify the malfunctioning ignition coil, and replace it.

Ignition Coil with Built-in Igniter Inspection

1. Disconnect the negative battery cable.
2. Remove the charge air cooler. (See 01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH TC].)
3. Disconnect the ignition coil connector.
4. Measure the resistance between each terminal on the ignition coil connector using an analog circuit tester.
• If the measurement corresponds to the table, replace the ignition coil.
Tester Connection Position
Item
Positive
C
A
C
Terminal
B
A
B
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WM: SPARK PLUG
01-18–2
IGNITION SYSTEM [L3 WITH TC]
Negative
A
C
B
C
B
A
6.0—9.5 {62—96, 54—83}
1
Condition
0 ohm is not normal (∞ ohm is normal)
∞ or 0 ohm is not normal (several kilohm is normal)
A B
id011839800200
2
N·m {kgf·cm, in·lbf}
acxuuw00002035
id011839800300
C
acxuuw00001990