Intermittents

Conditions that are not always present are called intermittents. To resolve intermittents, perform the following steps:
1. Observe history DTCs, DTC modes, and freeze-frame data.
2. Evaluate the symptoms and the conditions described by the customer.
3. Use a check sheet or other method to identify the circuit or electrical system component.
4. Follow the suggestions for intermittent diagnosis found in the service documentation.
Most scan tools, such as the Tech II and the J 39200 (Fluke model 87 DVOM), have data-capturing capabilities that can assist in detecting intermittents.