Diagnostic Aids
WARNING: This page is about a different variant/trim than selected.
Fuel Injector Coil Test
| Injector | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| Measured resistance of each fuel injector | 12 Ω | 13 Ω | 13.5 Ω | 14 Ω | 10 Ω | 12 Ω |
| Lowest resistance value subtracted from the highest resistance value | Injector 4 = 14Ω Injector 5 = 10Ω =4Ω |
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| Sum of all fuel injector resistance values divided by the total number of fuel injectors | Injector 1 = 12Ω Injector 2 = 13Ω Injector 3 = 13.5Ω Injector 4 = 14Ω Injector 5 = 10Ω Injector 6 = 12Ω = 74.5Ω Average resistance value: 74.5 /6 = 12.4Ω |
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| Subtract the lowest injector resistance value from the average resistance value | Average resistance value = 12.4Ω Injector 5 = 10Ω Difference = 2.4Ω |
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| Compute the difference between the highest injector resistance value and the average resistance value Subtract the average resistance value from the highest injector resistance value. |
Injector 4 = 14Ω Average resistance value = 12.4Ω Difference = 1.6 Ω Replace fuel injector 5. |
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- Monitoring the misfire current counters, or misfire graph, may help to isolate the fuel injector that is causing the condition.
- Operating the vehicle over a wide temperature range may help isolate the fuel injector that is causing the condition.
- Perform the fuel injector coil test within the conditions of the customer's concern. A fuel injector condition may only be apparent at a certain temperature, or under certain conditions.
- If the fuel injector coil test does not isolate the condition perform the fuel injector balance test. Refer to Fuel Injector Balance Test with Special Tool .