P050B - Cold Start Ignition Timing Performance
DESCRIPTION
This monitor will run when the engine is started at -10 to 50锟斤拷C (14 to 122锟斤拷F) of the engine coolant temperature. The DTC can be set after the engine
idles for 13 seconds or more (2 trip detection logic).
The DTC is designed to monitor the idle air control at cold start. When the engine is started at lower than 50锟斤拷C (122锟斤拷F) of the engine coolant
temperature, the ECM measures the accumulated mass air flow at idle. If it does not reach the criteria 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 electrical 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.
NOTICE:
When the negative (-) battery terminal is disconnected during inspection or repairs, the idle speed control learned values are
cleared. Idle speed control learning is performed when the engine has been warmed up and idled for 5 minutes because this DTC
cannot be set after the idle speed control learned values are cleared.
MONITOR DESCRIPTION
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
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