Description
The ECM controls the engine idle speed to a specified level via the fine adjustment of the air, which is let into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is varied to allow for optimum control of the engine idling speed. The crankshaft position sensor (POS) detects the actual engine speed and sends a signal to the ECM.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions, such as during warming up, deceleration and engine load (air conditioner, power steering and cooling fan operation, etc.).
DTC Logic
DTC DETECTION LOGIC
NOTE: If DTC P0507 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
If the target idle speed is out of the specified value, perform EC-21, "IDLE AIR VOLUME LEARNING : Special Repair Requirement", before conducting DTC Confirmation Procedure.
TESTING CONDITION:
2.PERFORM DTC CONFIRMATION PROCEDURE
Diagnosis Procedure
1.CHECK PCV HOSE CONNECTION
Confirm that PCV hose is connected correctly.
2.CHECK INTAKE AIR LEAKAGE
3.REPLACE ECM
Magnet clutch
Description
SYSTEM DESCRIPTION
A/C auto amp. controls A/C compressor operation by ambient temperature and
signal from ECM.
Low Temperature Protection Control
A/C auto amp. will turn the A/C compressor ON or OFF as determined
by a signal detected by ambient sensor.
When ambient temperatur ...
Engine compartment check locations
VQ35DE engine
Engine coolant reservoir
Drive belt location
Engine oil filler cap
Brake fluid reservoir
Air cleaner
Fuse block
Fuse block/Fusible links
Fusible links
Battery
Engine oil dipstick
Radiator cap
Power steering fluid reservoir
Windshield-washer fluid reservo ...
Cup holders
Front cup holders
CAUTION
Avoid abrupt starting and braking when
the cup holder is being used to prevent
spilling the drink. If the liquid is hot, it
can scald you or your passenger. Spilled
liquid can also damage the seat climate
system.
Use only soft cups in the cup holder.
...