Monitor Description
This monitor will run when the engine is started at an engine coolant temperature of -10 to 50°C (14 to 122°F). The DTC can be set after the engine idles for 13 seconds (2 trip detection logic).
The DTC is designed to monitor the idle air control at cold start. When the engine is started at an engine coolant temperature of lower than 50°C (122°F), the ECM measures the accumulated mass air flow at idle. If it does not reach the specified level within 10 seconds, the ECM interprets this as a malfunction. The MIL is illuminated and a DTC is set when the malfunction is detected in consecutive driving cycles (2 trip detection logic).
The electronic throttle control system controls the idle speed. The electronic throttle control system operates the throttle actuator to open and close the throttle valve, and adjusts the intake air amount to achieve the target idle speed.
When the cable is disconnected from the negative (-) battery terminal during inspection or repairs, the idle speed control (ISC) learned values are cleared. This DTC cannot be stored with the idle speed control learned values cleared.
HINT:
The idle speed control learning is performed when the engine is warmed up and has been idling for 5 minutes.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P050A | Insufficient mass air flow after a cold start (2 trip detection logic) |
|