Ignition Coil Inspection
- Perform the spark test and identify the malfunctioning cylinder.
- Replace the ignition coil of the malfunctioning cylinder with that of a normal cylinder, and re-perform 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 Power Switch Inspection
- Remove the engine cover. (See «ENGINE COVER REMOVAL/INSTALLATION [13B-MSP]»(ref-367623-S37771794152010072700000) .)
- Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [13B-MSP]»(ref-367630-S30865077932010072700000) .)
- Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [13B-MSP]»(ref-367630-S30865077932010072700000) .)
- Remove the air hose (air cleaner to throttle body). (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) .)
- Disconnect the ignition coil connector.
- 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.
| Item | Tester Connection Position | Condition | |
|---|---|---|---|
| Positive | Negative | ||
| Terminal | A | B | Infinity or 0 ohm is not normal |
| B | C | ||
| C | A | 0 to several kilohms (continuity) is not normal | |
RESISTANCE REFERENCE CHART
Scheme 2
Plug Gap Inspection
| CAUTION | To avoid possible damage to the tip, do not adjust the plug gap. To prevent damaging the tip, use a wire type plug gap gauge when inspecting the plug gap. |
- Measure the spark plug gap using a wire type plug gap gauge.
- If it is more than the maximum specification, replace the spark plug.
Standard spark plug gap 1.15-1.25 mm {0.046-0.049 in}
Maximum spark plug gap
Leading side: 1.5 mm {0.059 in}
Trailing side: 1.4 mm {0.055 in}
Visual Inspection
- Inspect the following items
- If any of the following malfunctions are indicated, replace the spark plug.
- Insulator breakage
- Worn electrode
- Damaged gasket
- Badly burned insulator (sparking side)
Scheme 3
Resistance Inspection
- Measure the resistance of the spark plug using a tester as shown in the figure.
- If not within the specification, replace the spark plug.
Spark plug resistance [25°C {77°F}] 3.0-7.5 kilohms
Scheme 4
HIGH-TENSION LEAD INSPECTION [13B-MSP]
- Remove the high-tension lead. (See «HIGH-TENSION LEAD REMOVAL/INSTALLATION [13B-MSP]»(ref-367622-S09946165062010072700000) .)
- Measure the resistance using a tester.
- If not within the specification, replace the high-tension lead.
High-tension lead resistance [20°C {68°F}] 1.0-4.0 kilohms