Replacement procedure steps for idle air control module

If the ECM is working properly, this is usually caused by a problem with the Idle Air Control (IAC) motor - carbon may have contaminated the seat and pintle or it may just be malfunctioning. You can remove and clean the channels and pintle with a carb cleaner, but you may have a problem getting it to work properly afterward and have to replace it.
After installing the IAC, the reset procedure is:
1. Turn the ignition switch to the ON position for 5 seconds.
2. Turn the ignition switch to the OFF position for 10 seconds.
3. Start the engine.
4. Check for the proper idle operation.

DTC C0131 Antilock Brake System (ABS)/Traction Control System (TCS) Pressure Circuit

The master cylinder pressure sensor is located within the brake pressure modulator valve (BPMV). The master cylinder pressure sensor signal, to the electronic brake control module (EBCM), increases as hydraulic pressure in the front brake circuit increases.

Conditions for Setting the DTC co131
Any of the following conditions may cause the DTC to set.
• The EBCM detects open master cylinder pressure sensor circuitry.
• The EBCM detects shorted master cylinder pressure sensor circuitry.
• The master cylinder pressure sensor self-test, which occurs at power-up, fails.
• The zero-pressure signal voltage is not within an acceptable range.
• The master cylinder pressure is not within an expected tolerance based on deceleration rate and other data available to the EBCM.

1
Did you perform the Diagnostic System Check - Vehicle?
YES - Go to Step 2
NO - Go to Diagnostic System Check - Vehicle
2
Inspect the vehicle for the following and ensure that there is no base brake failure:
• Dragging brakes
• Faulty parking brake switch
• Brake fluid leakage
• Air in hydraulic system
• Seized brake calipers
• Swollen, kinked or otherwise damaged brake hoses
Did you find and correct the condition?
YES - Go to Step 9
NO - Go to Step 3
3
Drive the vehicle in order to verify that the brakes do not self-apply during turning maneuvers.
Do the brakes self-apply during turning maneuvers?
YES - Go to Symptoms - Hydraulic Brakes
NO - Go to Step 4
4
Use the scan tool to clear the DTCs.
Turn OFF the ignition for 5 seconds.
Turn ON the ignition.
Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?
YES - Go to Step 5
NO - Go to Diagnostic Aids
5
Select the vehicle stability enhancement system (VSES) Data Display function on the scan tool.
Observe the Brake Switch Status parameter while pressing and releasing the brake pedal.
Does the Brake Switch Status change while pressing and releasing the brake?
YES - Go to Step 6
NO - Go to DTC C0161
6
Remove the electronic brake control module (EBCM) from the vehicle. Refer to Control Module References .
Inspect the master cylinder pressure sensor connector within the EBCM for damage or corrosion.
Is there connector damage or corrosion present?
YES - Go to Step 8
NO - Go to Step 7
7
Important: Following EBCM replacement, perform the set-up procedure for the EBCM. Use the scan tool to perform the Tire Size Calibration procedure.
Replace the EBCM. Refer to Control Module References .
YES - Did you complete the replacement?
NO - Go to Step 9
--
8
Important: Following EBCM replacement, perform the set-up procedure for the EBCM. Use the scan tool to perform the Tire Size Calibration procedure.
Replace the EBCM and the brake pressure modulator valve (BPMV). Refer to Control Module References .
YES - Did you complete the replacements?
NO - Go to Step 9
--
9
Use the scan tool Clear All Class 2 DTCs function to clear all of the DTCs from all modules.
Turn OFF the ignition for 5 seconds.
Turn ON the ignition.
Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?
YES - Go to Step 2
NO - System OK

Since you didn't provide a year and model, I can only generalize. Make sure the buttery-fly valve is moving freely and not binding, then check the idle air control valve, if the idle air control valve is stuck open, the car can actually drive upwards of 40mph without stepping on the gas.

If you need further help, reach me via phone at https://www.6ya.com/expert/daniel_4061c3d97c12c4c7

HI
first I would like to tell you, do this procedure only if the 5th digit of your VIN is C or K.

Description

The engine control module (ECM) learns the idle position of the throttle plate to ensure the correct idle. Anytime the throttle body is cleaned or replaced, the ECM must learn the new throttle position. The idle may be unstable or a DTC may set if the throttle position is not learned.

Conditions for Running the Throttle Learn Procedure

• DTCs P0101, P0102, P0103, P0107, P0108, P0111, P0112, P0113, P0506, and P0507 are not set.

• The engine speed is between 450-4,000 RPM.

• The manifold absolute pressure (MAP) is greater than 5 kPa.

• The mass air flow (MAF) is greater than 2 g/s.

• The ignition 1 voltage is greater than 10 volts.

Throttle Learn

Important: Do NOT perform this procedure if DTCs are set. Refer to Diagnostic Trouble Code

(DTC) List - Vehicle.

1. Start and idle the engine in PARK for 3 minutes.

2. With a scan tool, monitor desired and actual RPM.

3. The ECM will start to learn the new idle cells and Desired RPM should start to decrease.

4. Ignition OFF for 60 seconds.

5. Start and idle the engine in PARK for 3 minutes.

6. After the 3 minute run time the engine should be idling normal.

Important: During the drive cycle the check engine light may come on with idle speed DTCs. If idle speed codes are set, clear codes so the ECM can continue to learn.

* If the engine idle speed has not been learned the vehicle will need to be driven at

speeds above 70 km/h (44 mph) with several decelerations and extended idles.

7. After the drive cycle, the engine should be idling normally.

* If the engine idle speed has not been learned, turn OFF the ignition for 60 seconds

and repeat step 6.
8. Once the engine speed has returned to normal, clear DTCs.
Good Luck

Make sure you are looking up the code properly. 1283 for Nissan indicates a lean condition on bank 2. See link below. A vacuum leak is likely, but make sure the new sensor is recalibrated. Did you perform the relearn procedure after replacing the sensor? If not, see the second link below. If you ran the relearn procedure and cleared all codes but 1283 comes back, look for a loose vacuum line or leaky intake manifold gaskets. P1283 Nissan Air Fuel Ratio Sensor 1 Lean Shift Monitoring Bank 2 1998 2012 Nissan Altima Clear Mixture Ratio Self Learning Control Data

DTC P0506

CIRCUIT DESCRIPTION
The throttle actuator control (TAC) motor is controlled by the engine control module (ECM). The DC motor located in the throttle body drives the throttle plate. In order to decrease idle speed, the ECM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the ECM commands the throttle plate open allowing more air to pass the throttle plate. If the actual idle RPM does not match the desired idle RPM within a calibrated time, this DTC sets.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0506 Idle Speed Low

CONDITIONS FOR RUNNING THE DTC
- DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0120, P0122, P0123, P0171, P0172, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0220, P0121, P0222, P0223, P0230, P0300, P0336, P0442, P0446, P0449, P0452, P0453, P0455, P0462, P0463, P0496, P1516, P2101, P2135, P2176 are not set.
- The engine is operating for at least 60 seconds.
- The engine coolant temperature (ECT) is more than -60°C (-140°F).
- The intake air temperature (IAT) is more than -10°C (-14°F).
- The barometric pressure (BARO) is more than 65 kPa.
- The system voltage is between 9-18 volts.
- The vehicle speed is less than 1.6 km/h (1 mph).
- DTC P0506 runs continuously when the above conditions are met.

CONDITIONS FOR SETTING THE DTC
- The actual idle speed is approximately 100 RPM lower than the desired idle speed.
- The above condition is present for 5 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.

TEST DESCRIPTION

View & Print Options Step 1 - Step 5
The number below refers to the step number on the diagnostic table.
2. This test determines whether the engine can achieve the commanded RPM. If the engine does not reach the commanded RPMs, the test determines whether the RPM is too high or too low.
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There is a few options but first I am hoping with your fuel pump replacement that you replaced the fuel filter if not do it first.
next have you checked you throttle body idle speed control device... See below on diagnostics
The curb and fast idle speeds are controlled by the Engine Control Assembly (ECA) and the Idle Speed Control Bypass Air Valve (ISC-BPA) . The ISC-BPA valve is not adjustable. A large increase or decrease in closed plate airflow from the calibrated level will not allow this device to control the speed.
The idle speed setting procedure has been revised considerably to reflect the expanded application of the Self-Test idle speed options and because the throttle body incorporates an orifice in the throttle plate to control idle airflow as part of the sludge tolerant design.


Throttle bodies with sludge tolerant design are clearly identified with a Yellow/Black decal. This decal warns that the throttle plate stop screw must not be adjusted counterclockwise (backed off), as this will not reduce the engine speed but may cause the throttle plate to stick in the bore. Backing out the screw may be required if the throttle body has been previously serviced (a plug in the throttle plate orifice may be present) or the plate stop screw tampered with (TPS Self-Test output out of range). The decal also warns that the throttle body must NOT be cleaned inside the bore, as this cleaning will impair the sensitive coating. The sludge accumulation will not affect the idle air flow. The cleaning procedure for the ISC-BPA still applies.

REMEMBER
A change in idle airflow can occur not only at the throttle body but other areas as well. You should enter the idle speed procedure only after other possible causes in the following areas are eliminated.

• Contamination within the idle speed control device
• Lack of fuel system control (excessively rich or lean)
• Throttle sticking or binding
• Engine not reaching operating temperature
• Incorrect ignition timing
• Incorrect or clogged PCV system
• Vacuum leaks (intake manifold, vacuum hoses, vacuum reservoirs, power brake booster etc.

VERIFY

• Transmission is in PARK (A/T), or NEUTRAL (M/T)
• Parking brake is applied (automatic brake disconnected where applicable)
• Wheels blocked
• Engine at operating temperature
• Proper fuel pressure and no exhaust smoke
• Correct and clean PCV system
• Heater, A/C, and other accessories OFF
• Ignition timing is set to specification
• EEC-IV diagnostics have been performed and vehicle malfunction indicated service output codes have been resolved.

STEP 1
With the engine OFF, connect a tachometer, according to manufacturer's instructions. Disconnect the negative (-) terminal of the battery for 5 minutes, then reconnect it.
STEP 2
START the engine and let stabilize for two minutes. Goose the accelerator and let the engine return to idle. Lightly depress and release the accelerator, then let the engine idle.
STEP 3
If the engine is not idling properly, turn the engine OFF, and proceed with this procedure.
STEP 4
Disconnect Idle Speed Control Air Bypass Solenoid.
STEP 5
START and RUN the engine at 2500 rpm for 30 seconds.
STEP 6
Place the transmission in PARK (A/T), or NEUTRAL (M/T).
STEP 7
Using a tachometer, verify the idle speed is at 650 +/-150 rpm.



NOTE: A plug in the throttle body orifice will decrease idle rpm. Where as an orifice without a plug will increase idle rpm. Orifice plugs and installation tools are available in service kit # FOPZ-9F652-A.

RPM TOO LOW

1. DO NOT clean the throttle body, check the plate orifice plug.

• If there is no plug, turn the screw clockwise to the desired rpm.
• If there is a plug from previous service, remove the plug, then adjust the screw in either direction as required. Screw must be in contact with the lever pad after adjustment.

RPM TOO HIGH

1. Turn the engine OFF.
2. Disconnect air cleaner hose.
3. Temporarily block the orifice in the throttle plate with tape. If the orifice already has a plug from previous service proceed to Step (e).
4. RESTART the engine. Check the idle speed, using a tachometer. NOTE: On vehicles with Mass Air Flow Sensors, reconnect the air intake duct hose prior to rechecking the rpm. If the engine stalls, crack open the throttle plate stop screw, but DO NOT over adjust.
5. If rpm continues to be fast, perform KOEO Self-Test.

• If TPS output code is within range, remove tape from throttle body and check for other possible causes.
• If TPS output is out of range, adjust screw for proper TPS code. Lever must be in contact with the screw.
• If rpm is still fast, terminate the procedure and check for other possible causes.

1. If rpm drops to 650 rpm or lower, or the engine stalls, turn the engine OFF, disconnect the air cleaner hose, and remove the tape from throttle plate.
2. Install an orifice plug with proper color code according to the throttle plate orifice size.
3. Reconnect the air cleaner hose. START the engine, and check the idle rpm using a tachometer. Turn the throttle plate stop screw clockwise until an idle speed of 650 +/- 25 rpm is achieved. NOTE: DO NOT turn the plate stop screw counterclockwise. This may cause the throttle plate to stick at idle.

STEP 8
Run the KOEO Self-Test for proper TPS code output.
STEP 9
Reconnect the Idle Speed Control Air Bypass Solenoid. Verify the throttle is not sticking in the bore, and the linkage is not preventing throttle from closing.
STEP 10
START the engine and idle for two minutes. Goose the accelerator and let the engine return to idle. Lightly depress and release the accelerator, then let engine idle.

PROCEDURES FOR PLUG INSTALLATION

STEP 1
Remove air inlet tube(s) from throttle body.
STEP 2
Select the proper color plug by using the Go/No-Go gauge pegs, included in the service kit (FOPZ-9F652-A).
STEP 3
Starting with the largest diameter gauge peg, attempt to insert through the throttle plate orifice.
STEP 4
If the gauge peg goes through the orifice, use the corresponding color plug.
If the gauge peg does not go through, proceed with the next smaller gauge peg for Go/No-Go Test.
NOTE: It is important that the largest Go/No-Go combination is used to determine the proper plug size.
STEP 5
If the smallest gauge peg does not go through the orifice, use the reamer bit and handle included with the service kit to enlarge the plate orifice. Wipe bearing grease on both sides of the plate orifice and on the reamer bit to hold the brass chips. After reaming, wipe plate clean and then return to Step 3 to determine the proper plug size.
STEP 6
Using the installation tool from the service kit, push the plug into the orifice until bottoming out at the throttle plate.
STEP 7
Open and snap closed the throttle several times to verify proper plug retention.
STEP 8
Reconnect the air inlet tube(s).
STEP 9
Reset idle rpm per engine requirement using the throttle plate stop screw.


Hope this helps

may just need cleaning with carb cleaner.

here is 1996, oldest I have:

Section 03-14: Engine Controls, Electronic 1996 Taurus, Sable Workshop Manual
REMOVAL AND INSTALLATION Idle Air Control (IAC) Valve Removal

1. Disconnect battery ground cable (14301). Refer to Section 14-01 .
   

1. Disconnect the engine control sensor wiring (12A581) from the idle air control valve (IAC valve) (9F715) at the idle air control valve electrical connector.
   

1. Remove the two idle air control valve retaining bolts.
   

1. Remove the idle air control valve and idle air control valve gasket.
   

Installation

1. NOTE: If scraping is necessary, be careful not to damage idle air control valve gasket surfaces, or drop material into intake manifold (9424) or throttle body (9E926) (depending upon application).
   
   Clean idle air control valve gasket mating surfaces.
   

1. To install idle air control valve, reverse Removal procedure.
   

1. Tighten the idle air control valve retaining bolts to 8-12 Nm (71-106 lb-in).
   

An IAC (idle air control) motor is designed to adjust the engine idle RPM speed by opening and closing an air bypass passage inside the throttle body. The car computer or ECM (electronic control module) receives information from various sensors and will output signals to adjust the IAC motor in or out to adjust engine idle speed by controlling engine idle air.
An IAC motor is highly susceptible to carbon and coking build up; if an IAC goes too long without cleaning it can cause stalling and poor idle quality. Some cars are designed with a large vacuum transfer hose that connects the intake manifold to the IAC (idle air control) motor. If a broken or dilapidated these vacuum lines can cause the engine to lose vacuum which will allow the engine to run rough and die. 
Inspect all engine and accessory vacuum lines to look for missing, torn or dilapidated lines and replace as needed. To check the IAC motor remove the unit, with the wires connected turn the key to the "on" position without starting the engine, the IAC should move in or out. 
If the IAC motor does nothing it has probably failed, replace it with a new unit and recheck system. Note: while the IAC motor is removed clean (use aerosol carburetor cleaner) the passages the IAC uses to control idle air speed.

Good luck and hope this helps

idle stepper motor(IAC) controls idle speed it is located on throttle body
IDLE LEARN PROCEDURE
Whenever the battery cables, the electronic control
module (ECM), or the ECM fuse is disconnected or replaced,
the following idle learn procedure must be performed:
1. Turn the ignition ON for 5 seconds.
2. Turn the ignition OFF for 5 seconds.
3. Turn the ignition ON for 5 seconds.
4. Start the engine in P/N (park/neutral).
5. Allow the engine run until the engine coolant is
above 85_C (185_F).
6. Turn the air conditioning (A/C) ON for 10 seconds, if
equipped.
7. Turn the A/C OFF for 10 seconds, if equipped.
8. If the vehicle is equipped with an automatic transaxle,
apply the parking brake. While pressing the
brake pedal, place the transaxle in drive (D).
9. Turn the A/C ON for 10 seconds, if equipped.
10. Turn the A/C OFF for 10 seconds, if equipped.
11. Turn the ignition OFF. The idle learn procedure is
complete.