What causes the test warning light to illuminate?
1 Answers
test is a diagnostic trouble indicator that activates when the vehicle detects abnormal operation, allowing the system to self-diagnose problematic components. Below is an explanation regarding the warning light: Cause: During engine combustion, proper air intake is crucial, making the air filter element particularly important. If the vehicle's air filter is dirty and not cleaned regularly, it can obstruct airflow. Prolonged neglect may lead to clogging, which in severe cases triggers the engine warning light. Solution: Inspect each fuel injector. Let the engine idle and sequentially disconnect each injector connector to observe idle speed changes. If disconnecting each cylinder's injector results in similar idle speed reduction, the injectors are functioning normally. If disconnecting a specific injector causes no change in engine idle speed or stability, measure the injector connector's resistance (should be 10~13Ω). Replace the injector if readings deviate from specifications.