4. CHECK THROTTLE WITH MOTOR BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)
(a) Check for contamination between the throttle valve and the housing. And check that the throttle valve moves smoothly.
OK:
Throttle valve is not contaminated with foreign objects and moves smoothly.
NG -- REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY See: Powertrain Management/Fuel Delivery and Air
Induction/Throttle Body/Service and Repair/Removal
OK -- REPLACE ECM See: Powertrain Management/Computers and Control Systems/Engine Control Module/Service and
Repair/Removal
From 08/2009
2GR-FE ENGINE CONTROL: SFI SYSTEM: P0505: Idle Control System Malfunction
P0505 - Idle Control System Malfunction
DESCRIPTION
The idle speed is controlled by the electronic throttle control system. The electronic throttle control system is comprised of: 1) one valve type throttle
with motor body assembly; 2) the throttle actuator, which operates the throttle valve; 3) the throttle position sensor, which detects the opening angle
of the throttle valve; 4) the accelerator pedal position sensor, which detects the accelerator pedal position; 5) the ECM, which controls the electronic
throttle control system. Based on the target idle speed, the ECM controls the throttle actuator to provide the proper throttle valve opening angle.
MONITOR DESCRIPTION
The ECM monitors the idle speed and idle air flow volume to conduct idle speed control. The ECM determines that the idle speed control system is
malfunctioning if the following conditions are met:
- The learned idle air flow volume remains at the maximum or minimum volume for 5 seconds or more during a driving cycle.
- After driving at a vehicle speed of 6.25 mph (10 km/h) or more, the actual engine idle speed varies from the target idle speed by more than
-100 rpm or 150 rpm or more when the A/C and NSW are off, or more than -100 rpm or 200 rpm or more when the A/C or NSW are on, 5
times or more during a driving cycle, the ECM illuminates the MIL and sets the DTC.
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