Description
The idling speed is controlled by the etcs (electronic throttle control system). The etcs is comprised of: 1) the one valve type throttle body; 2) the throttle actuator, which operates the throttle valve; 3) the throttle position (tp) sensor, which detects the opening angle of the throttle valve; 4) the accelerator pedal position (app) sensor, which detects the accelerator pedal position; and 5) the ecm, which controls the etcs. Based on the target idling speed, the ecm controls the throttle actuator to provide the proper throttle valve opening angle.
Monitor description
The ecm monitors the idling speed and idling air flow volume to conduct idle speed control (isc). The ecm determines that the isc system is malfunctioning if the following conditions apply:
Example: if the actual idling speed varies from the target idling speed by more than 200 rpm* 5 times during a drive cycle, the ecm illuminates the mil and sets the dtc.
Hint:
*: Threshold idling speed varies with engine load.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Inspection procedure
Hint:
Hint:
If any dtcs other than p0505 are output, troubleshoot those dtcs first.
Ok: pcv hose is connected correctly and is not damaged.
Ok: no leakage from air induction system.
Ok: throttle valve is not contamainated with foreign objects and moves smoothly.
Reporting safety defects
for u.S. Owners
If you believe that your vehicle has a defect which could cause a
crash or could cause injury or death, you should immediately
inform the national highway traffic safety administration
(nhtsa) in addition to notifying toyota motor sales, u.S.A., Inc.
(Toll-free: 1-800-331-4331).
If nhtsa re ...
Installation (2006/01- )
Install front drive shaft assembly lh
Coat the spline of the inboard joint shaft with gear
oil.
Align the shaft splines and tap in the drive shaft with
a brass bar and hammer.
Notice:
Set the snap ring with the opening side facing
downwards.
Be careful not to damage the ...
Problem symptoms table
Hint:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms
are listed in order of probability in the "suspected area"
column of the table. Check each symptom by checking the
suspected areas in the order they are listed. Re ...