2003 Nissan Pathfinder adjust automatic thorrth controw

Tiny
RICKSCHLEGEL
  • MEMBER
  • 2003 NISSAN PATHFINDER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 70,000 MILES
70000 I just put on a new automatic thorrth control and I am getting a code of p0507 idle control systemrpm higher then expected how do I adjust?
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Friday, September 4th, 2009 AT 7:25 AM

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Tiny
KHLOW2008
  • EXPERT
Hi Rickschlegel,

Thank you for the donation.

Here are the diagnostics for the code.

DTC P0507 : IDLE SPEED CONTROL SYSTEM - IDLE HIGHER THAN EXPECTED
NOTE: If any other DTC is also set, perform diagnosis for other DTC first.
Before performing diagnostic procedure, follow testing procedure. Use appropriate illustration to identify harness connector locations or terminals.

Description

The ECM controls the engine idle speed to a specified level through 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 and power steering operation, etc.).

Possible Causes
ECM illuminates MIL and sets DTC P0507 when idle is not in specified range. Possible causes are:

" Electric throttle control actuator fault.
" Intake air leaks.
" PCV system fault.

DTC Confirmation Test
NOTE: If target idle speed is not 700 -800 RPM (no load in Park) or more than 825 RPM (A/C on in Park), perform idle air volume learning procedure before proceeding.
NOTE: Before proceeding, ensure battery voltage is more than 11 volts with ignition on. If DTC confirmation procedure had been previously run,
turn ignition off and wait at least 10 seconds before continuing. Before proceeding, ensure battery voltage is more than 11 volts at idle and ambient temperature is more than 14 F ( - 10 C).

1 . Open hood. Start engine and warm to normal operating temperature.
2 . Turn ignition off and wait at least 10 seconds. Turn ignition on. Select DATA MONITOR mode on CONSULT -II or generic scan tool.
3 . Start engine let it idle for at least one minute. If 1st trip DTC is detected, go to DIAGNOSTIC PROCEDURE . If 1st trip DTC is not detected, system is okay at this time.

Diagnostic Procedure
1 . Start engine and allow to idle. Check for vacuum leak after MAF sensor. If no problem is found, go to next step. If problem is found, repair as necessary. After repair, repeat DTC CONFIRMATION TEST .

2 . Replace ECM. Perform appropriate procedures under PROGRAMMING . If result is complete, testing is complete. After repair, repeat DTC CONFIRMATION TEST .

PROGRAMMING
ACCELERATOR PEDAL RELEASED POSITION LEARN
Accelerator Pedal Released Position Learning is an operation to learn the fully released position of the accelerator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each time harness connector of accelerator pedal position sensor or ECM is disconnected.

1 . Make sure that accelerator pedal is fully released.
2 . Turn ignition on and wait at least 2 seconds. Turn ignition off and wait at least 10 seconds.
3 . Repeat step 2 twice.

THROTTLE VALVE CLOSED POSITION LEARNING
"Throttle Valve Closed Position Learning" is an operation to learn the fully closed position of the
throttle valve, monitoring the throttle position sensor output signal. It must be performed each time harness connector of electric throttle control actuator or ECM is disconnected.

1 . Make sure that accelerator pedal is fully released.
2 . Turn ignition on. Turn ignition off and wait at least 10 seconds.
3 . Ensure throttle valve moves during 10 seconds when ignition is off.

IDLE AIR VOLUME LEARNING
Description
Idle air volume learning is an operation to learn the idle air volume that keeps each engine within the specific range. It must be performed under any of the following conditions:

" Each time Idle Air Control Valve, throttle body or ECM is replaced.
" Idle speed or ignition timing is out of specification.

Pre -Conditioning
Before proceeding, ensure the following conditions are met. Learning will be cancelled if any of the following conditions are missed for even a moment.

" Battery voltage: more than 12.9 volts at idle
" Engine coolant temperature: 158 -212 F (70 - 100 C)
" Transmission: Park or Neutral
" Electric load switch: OFF (A/C, headlights, rear window defogger).

On vehicles equipped with daytime light systems, set lighting switch to the 1st position to light only small lamps.

" Steering wheel: Neutral (straight-ahead position).
" Vehicle speed: Zero MPH
" Transmission: warmed up. If using CONSULT-II, confirm FLUID TEMP SE in DATA MONITOR mode of A/T system indicates less than 0.9 volt. Or, drive vehicle for 10 minutes to warm up transmission.

Without CONSULT-II
NOTE: It is better to count the time accurately with a clock.
NOTE: It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has a malfunction.
NOTE: Ensure ACCELERATOR PEDAL RELEASED POSITION LEARN and THROTTLE VALVE CLOSED POSITION LEARNING have been performed before continuing.

1 . Start engine and warm to normal operating temperature.
2 . Ensure all conditions under PRE-CONDITIONING are met.
3 . Turn ignition off and wait at least 10 seconds.
4 . Confirm that accelerator pedal is fully released, turn ignition on and wait 3 seconds.
5 . Repeat the following procedure quickly five times within 5 seconds: Fully depress the accelerator pedal. Fully release the accelerator pedal.


http://www.2carpros.com/forum/automotive_pictures/192750_IdleLearning03PathfinderFig18_1.jpg



6 . Wait 7 seconds, fully depress the accelerator pedal and keep it depressed for about 20 seconds until the MIL stops blinking and turns ON.
7 . Fully release the accelerator pedal within 3 seconds after the MIL turns ON.
8 . Start engine and let it idle.
9 . Wait 20 seconds.
10 . Rev up engine 2 or 3 times and ensure that idle speed and ignition timing are within specifications. M/T and A/T in Park or Neutral: Idle speed: 700 - 800 RPM, ignition timing: 10 -20 BTDC.
11 . If idle speed and timing is not as specified, Idle Air Volume Learning will not be complete. In this case, find the cause of the incident. Proceed as follows:
a . Check that throttle valve is fully closed.
b . Check PCV valve operation.
c . Check that downstream of throttle valve is free from air leakage.
d . When the above 3 items check out OK, engine component parts and their installation condition are questionable. Check and eliminate the cause of the incident.
e . If any of the following conditions occur after the engine has started, eliminate the cause of the incident and perform IDLE AIR VOLUME LEARNING all over again:

" Engine stalls.
" Erroneous idle.

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Friday, September 4th, 2009 AT 10:51 AM

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