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What is relearn predcudre for idle on 08 chev. 1500 5.3 eng.


Throttle Learn
Description
The engine control module (ECM) learns the airflow through the throttle body to ensure the correct idle. The learned airflow values are stored within the ECM. These values are learned to adjust for production variation and will continuously learn during the life of the vehicle to compensate for reduced airflow due to coking. Anytime the throttle body airflow rate changes, for example due to cleaning or replacing, the values must be relearned.
A vehicle that had a heavily coked throttle body that has been cleaned or replaced may take several drive cycles to learn out the coking. To accelerate the process, the scan tool has the ability to reset all learned values back to zero. A new ECM will also have values set to zero.
The idle may be unstable or a DTC may set if the learned values do not match the actual airflow. Without Scan Tool - Learn Procedure
• DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0120, P0122, P0123, P0128, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206, P0220, P0222, P0223, P0300, P0351, P0352, P0353, P0496, P0601, P0604, P0606, P060D, P0641, P0651, P1516, P2101, P2119, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138, or P2176 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. Without Scan Tool - Learn Procedure
Important: Do NOT perform this procedure if DTCs are set. Refer to Diagnostic Trouble Code (DTC) List - Vehicle.
Start and idle the engine in PARK for 3 minutes.

The ECM will start to learn the new idle cells and Desired RPM should start to decrease.
Ignition OFF for 60 seconds.
Start and idle the engine in PARK for 3 minutes.
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.
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.
Once the engine speed has returned to normal, clear DTCs and return to the diagnostic that referred you here.

Dec 18, 2016 | Cars & Trucks

2 Answers

Bought car at auction- no keys. Had key made at GM dealer. Programmed key- key works. Car wont start- Codes are P0633 and P1629. cannot clear codes


DTC P0633 : Theft Deterrent Key Not Programmed

When learning the pre-release password, as well as the challenge and response sequence, the engine control module (ECM) is placed in learn mode. DTC P0633 will set automatically as an indicator that the system is in learn mode and not as a fault indicator. Once the password and challenge/response are learned, learn mode will be exited when the engine is successfully started. At this point, the DTC will be cleared. If the ECM does not exit learn mode, P0633 will remain current and indicate a fault.
The "key" referenced in the DTC descriptor does not refer to the vehicle key. In this case, "key" is referring to the challenge response.
DTC P0633 requires a successful engine start to exit the learn procedure and clear the DTC. If an unrelated malfunction exists that causes engine starting to be disabled or otherwise unavailable, learn mode will not exit and DTC P0633 will remain current. In this situation, the cause of the inoperative engine starting must be corrected before diagnosing DTC P0633.
DTC P1629: Theft Deterrent Fuel Enable Signal Not Received
The theft deterrent module (TDM) sends the pre-release password to the engine control module (ECM) via the serial data circuit. The ECM then sends a challenge to the TDM. Both the ECM and TDM perform a calculation on this challenge. If the calculated response from the TDM equals the calculation performed by the ECM, the ECM will allow vehicle starting.
DTC P1629 is an indicator that the challenge response was not received within the required 2 second window. This does not necessarily indicate a fault is present with the TDM or ECM. Factors such as a long engine crank, a delay in the serial data communication, or B-codes set in the TDM will cause DTC P1629 to set. This DTC should not be used as a fault indicator, but rather as a symptom to assist in the diagnosis of these other systems.
Who checked the codes , you -dealer ? You need to have BCM checked for codes B - codes ! you need a up scale diagnostic scan tool for that , dealer Tech -2 !
DTC B3935 57 : Transponder Authentication Error
DTC B3976 46 : Unconfigured Transponder/Vehicle Configuration Not Programmed
DTC B3060 : Unprogrammed Transponder Identification Code Received
DTC B3055: No Transponder Modulation or No Transponder
DTC B3031: Security System Controller In Learn Mode

Aug 07, 2015 | 2006 Buick Lucerne

2 Answers

How to relearn the acceleration sensor learning value


Hey...this code sets after maintaing the throttle body...this error is ABS speed sensor related...its an acceleration or deceleration error code...to clear this code... U need a profesdsional scanner to relearn the sensors...its a process called G-zero initialization...!
Am your Digimaster!

Oct 18, 2014 | Toyota RAV4 Cars & Trucks

1 Answer

04trailblazzer won't start driver2 comes up on display


Each key is learned. You must be using an extra key. No code is needed unless your backup key was not learned. Find driver 1 key and start the vehicle and then shut off the truck and within 5 seconds, insert the backup key and start the truck. Your backup key should now be learned.

Oct 12, 2014 | 2004 Chevrolet TrailBlazer

1 Answer

P1601 hilux code


DESCRIPTION

DTC No.DTC Detection ConditionTrouble AreaP1601When any condition below is met (1 trip detection logic):
  1. Fuel injector compensation code is not registered.
  2. Wrong injector compensation code is registered.
  3. Fuel injector pilot quantity learning value is not registered.
  1. Fuel injector compensation code
  2. Fuel injector pilot quantity learning value
  3. ECM
This is a copy of the Toyota manual for hi lux. Check for faulty injector / wiring

May 24, 2013 | Toyota Cars & Trucks

1 Answer

Code p0300 car has no power


Trouble Code: P0300

Engine Misfire Detected

Possible Causes:


You must perform the CKP system variation learn procedure before proceeding with the diagnostic table. Refer to Crankshaft Position System Variation Learn .

Dec 25, 2012 | 2006 Saturn ION

1 Answer

2000 pontiac grand am ,car cuts off on road .security.light comes on and you wait 5 min .sec.light goes out car will crank and go 2 to 10 miles .then problem starts over again.in code history in obd2 tool...


Here's a trouble shooting guide.Trouble Code: P1632

Theft Deterrent Fuel Disable Signal Received

Possible Causes:


Perform the Powertrain Onboard Diagnostic System CheckPassword Learn Procedure - Attempt to start the vehicle (leave the ignition "on"). The Theft System telltale will flash for 4 seconds and then remain "on" for 10 minutes. Theft System Learn Mode will display Disabled on the Scan ToolTurn the ignition "off" after the Theft System telltale goes "out".Repeat steps 1 and 2 two more times. After the Theft System telltale turns "off" on the 3rd key cycle, and Theft System Learn Mode will display Enabled on the Scan Tool, attempt to start the engine. Once the engine starts the password is learned.

Oct 27, 2012 | Cars & Trucks

1 Answer

Chevy express 1999 didn't start, i have a code p1336. i've change the crank shaft sensor but it didn't strat and i have a P1336 code again



Trouble Code: P1336

CKP Sensor System Variation Not Learned
Possible Causes:


Set the parking brake and block the drive wheels for safety. Verify the hood is closed. Read the trouble codes. If a code is set, refer to that code. Start the engine. Allow engine temperature to reach at least 158?F (70?C). Then key off. Select Crankshaft Position Variation Learn procedure on Scan Tool & start the vehicle. Apply the brake pedal firmly and verify the selector is in Park. Increase accelerator pedal position until fuel cutoff is reached at the test rpm (e.g., 5150). Quickly release the accelerator pedal after fuel cutoff is reached. The CKP system variation compensating values are learned when the engine speed (rpm) decreases back to idle speed and the procedure terminates. Read the trouble codes and recheck for DTC P1336. If DTC P1336 runs and passes, the CKP system variation "learn" procedure is complete. If not, look for other codes. If no codes are set, repeat the test procedure.

Jul 24, 2012 | Chevrolet Express Cars & Trucks

2 Answers

Can i get a new ignition switch for my 1999 LS will the sensors be affected?


Yes you can install and new ignition switch in your Blazer, once you have installed the new switch, your going to have to do a PASSLOCK II relearn for the new ignition key's to start the Blazer.
PASSLOCK - Reprogramming Auto Learn

IMPORTANT:

* The Body Control Module (BCM) must be programmed with the proper RPO configurations before performing learn procedures. See BCM Programming/RPO Configuration.
* If replacing the BCM with a GM Service Parts Operations (SPO) replacement part, the module will learn PASSLOCK sensor data code immediately. The existing VCM/PCM however, must learn the new fuel continue password when the BCM is replaced.
* If replacing a VCM/PCM with a GM Service Parts Operations (SPO) replacement part, after programming, these modules will learn the incoming fuel continue password immediately upon receipt of a password message. Once a password message is received, and a password is learned, a learn procedure must be performed to change this password again. A VCM/PCM which has been previously installed in another vehicle will have learned the other vehicle's fuel continue password and will require a learn procedure after programming to learn the current vehicle's password.

CONDITIONS
Use this procedure after replacing:

* Passlock Sensor
* BCM
* VCM
* PCM

30 MINUTE RE-LEARN PROCEDURE

1. Turn ON the ignition, with the engine OFF.
2. Attempt to start the engine, then release the key to ON (vehicle will not start).
3. Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
4. Turn OFF the ignition, and wait 5 seconds .
5. Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes (the vehicle is now ready to relearn the PASSLOCK Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK). IMPORTANT: The vehicle learns the PASSLOCK Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
6. Start the engine (the vehicle has now learned the PASSLOCK Sensor Data Code and/or password).
7. With a scan tool, clear any DTCs if desired (history DTCs will self clear after 100 ignition cycles).

Thank you foe using Fixya

Mar 20, 2010 | 1999 Chevrolet Blazer

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