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| Observation condition | |
| Function | Special pattern |
| Pattern height | Low |
| Pattern selector | Display |
| Engine condition | Idle |
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| Observation condition | |
| Function | Special pattern |
| Pattern height | Low |
| Pattern selector | Display |
| Engine condition | Idle |
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| Observation conditions | |
| Function | Special pattern |
| Pattern height | Variable |
| Variable knob | Adjust while viewing the wave pattern |
| Pattern selector | Display |
| Engine condition | Idle |
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| CONTRAST WITH STANDARD WAVE PATTERN | PROBABLE CAUSE |
| Injector coil induced voltage is low or doesn't appear at all | Short in the injector solenoid |
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| Observation condition | |
| Function | Special pattern |
| Pattern height | High |
| Pattern selector | Display |
| Engine condition | Revving |
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| CONTRAST WITH STANDARD WAVE PATTERN | PROBABLE CAUSE |
| Induced electromotive force does not appear or is extremely small | Malfunction of motor |
| CONTRAST WITH STANDARD WAVE PATTERN | PROBABLE CAUSE |
| Coil reverse electromotive force does not appear or is extremely small | Short in the coil |
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| Observation condition | |
| Function | Special pattern |
| Pattern height | Low |
| Pattern selector | Display |
| Engine condition | Idle |
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| CONDITION OF WAVE PATTERN BUILD-UP SECTION AND MAXIMUM VOLTAGE | PROBABLE CAUSE |
| Voltage value is too low | Open-circuit in ignition primary circuit |
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