P0505
DTC P0505 IDLE AIR CONTROL SYSTEMCIRCUIT DESCRIPTION
DTC Detection Condition:
The idle speed is controlled by the Electronic Throttle Control System (ETCS). The ETCS is comprised of:
1. a one valve type throttle body;
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 ETCS. Based on the target idle speed, the ECM controls the throttle actuator to provide the proper throttle valve opening angle.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Conditions:
Typical Malfunction Thresholds:
The ECM detects idle speed and idle air flow amount for Idle Speed Control (ISC). The ECM concludes that the ISC is malfunctioning if:
1. the learned value of the ISC remains at the maximum or minimum 5 times or more during drive cycle, and
2. while driving at 10 km/h (6 mph) or more, the actual idle RPM varies from the target RPM by -200 to -100 rpm or 100 to 200 rpm 5 times or more during a drive cycle.
Example: If the actual idle RPM varies from the target idle RPM by more than 200 rpm* five times during a drive cycle, the ECM will turn on the MIL and a DTC is set.
Step 1-4:
INSPECTION PROCEDURE
HINT:
- The detection of DTC P0505 may also be caused by:
1. the floor carpet overlapping onto the accelerator pedal, causing the accelerator pedal to be slightly depressed (throttle position to be slightly open); or
2. the accelerator pedal not being fully released.
- Read freeze frame data using the hand-held tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was LEAN or RICH, and other data from the time the malfunction occurred.