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Mercedes sprinter charge air system-offset drift under engine load

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Posted on Jan 02, 2017

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SOURCE: what does 2633 fault code mean (charge air system offset drift under engine load

2633 charge air system offset drift.The drift is the temperature inthe charged air system and the offset is the computers inabilaty to control it.Check your air filter.If its restricted or mostly clogged can result in temp drifting out of control.2633 is very hard to clear.Youll have to do a filter initialization,MAF initialization and a dpf regen to clear the code.Until you clear the code your engine will stay in Limp Home Mode resulting in no power ,early shifts.

Posted on Aug 22, 2012

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Our 2007 Ford Freestyle 3.0V6 shows B1318 code, also scanner shows low battery voltage module. Car shuts off.Please help what to do to fix?


Which module ?

B1318 Battery Voltage Low Audio Control Module REFER to Section 414-00 . B1318 Battery Voltage Low DSM REFER to Section 414-00 . B1318 Battery Voltage Low DVD Player REFER to Section 414-00 . B1318 Battery Voltage Low Instrument Cluster REFER to Section 414-00 . B1318 Battery Voltage Low RCM REFER to Section 414-00 . B1318 Battery Voltage Low Satellite Radio Receiver REFER to Section 414-00 . B1318 Battery Voltage Low SJB REFER to Section 414-00 .
According to this charging system isn't working correctly ! This is a computer controlled charging system .
Principles of Operation
The powertrain control module (PCM) controlled charging system determines the optimal voltage setpoint for the charging system and communicates this information to the voltage regulator. This system is unique in that it has 2 unidirectional communication lines between the PCM and the generator/regulator. Both of these communication lines are pulse-width modulated (PWM). The generator communication (GEN COM) line communicates the desired setpoint from the PCM to the voltage regulator. The generator monitor (GEN MON) line communicates the generator load and error conditions to the PCM. The third pin on the voltage regulator, the A circuit pin, is a dedicated battery voltage sense line.
The charging system voltage is controlled by the PCM. The generator charges the battery and at the same time supplies power for all of the electrical loads that are required. The battery is more effectively charged with a higher voltage when the battery is cold and a lower voltage when the battery is warm. The PCM is able to adjust the charging voltage according to the battery temperature by using a signal from the intake air temperature (IAT) sensor. This means the voltage setpoint is calculated by the PCM and communicated to the regulator by a communication link.
The PCM simultaneously controls and monitors the output of the generator. When the current consumption is high or the battery is discharged (the PCM recognizes this and increases the output of the generator to accommodate), the system is also able to increase the idle speed to increase the charge.
To minimize the engine drag when starting the engine, the PCM does not allow the generator to produce any output until the engine has started. The PCM then progressively increases the output of the generator.
The PCM turns the charging system warning indicator off after the engine is started and illuminates it under fault conditions (when the generator is not generating the correct amount of current with the engine running). The charging system warning indicator is also illuminated by the PCM whenever the key is ON with the engine OFF.
This is a System 4 charging system, which uses the GEN MON and GEN COM lines to control and monitor the charging system through the PCM. System 4 charging systems are virtually identical in design and therefore, share the same diagnostics. The circuit numbers and colors may be different, but the functions are the same.

Jun 30, 2017 | Ford Cars & Trucks

1 Answer

Engine overheats under load


There are quite a few reasons the engine could overheat other then a failed cooling fan clutch. I wonder if the fan is always on because the engine is always running hot?
This condition may be caused by any of the following possibilities:
• Installation of an aftermarket grille.
• A plugged charge air cooler.
• Fan clutch not operating properly.
• Drive belt slip.
• An overfilled transmission.
• Turbocharger not operating properly.
• A plugged air filter

Hope that helps........

Aug 27, 2008 | Chevrolet Silverado 3500HD Cars & Trucks

1 Answer

Frontend vibrition under load additinal random drift in frontend may be linked


have the cv joints ("U") joints checked for failing
the drift may be from them binding up when the angle for turn comes into play

Dec 27, 2015 | 2000 Chevrolet Blazer

1 Answer

2006 jeep wrangler automatic transmission drifts in park


I can't imagine how the drifting in park and the starter won't crank the engine could be related.
It is possible something happened to the flywheel and it is not now connected to the crankshaft, or the bendix gear on the starter is not engaging the flywheel.
But the transmission has a pawl or gear that locks the output shaft of the transmission when the shifter is in park. That gear could be damaged and would allow the truck to roll in park.
And the parking gear would not have anything to do with the starter issue.
I think I would check to see if the flywheel is connected to the crankshaft first.
Is the truck still under warranty ??

Jul 19, 2012 | 2006 Jeep Wrangler

1 Answer

What does 2633 fault code mean (charge air system offset drift under engine load


2633 charge air system offset drift.The drift is the temperature inthe charged air system and the offset is the computers inabilaty to control it.Check your air filter.If its restricted or mostly clogged can result in temp drifting out of control.2633 is very hard to clear.Youll have to do a filter initialization,MAF initialization and a dpf regen to clear the code.Until you clear the code your engine will stay in Limp Home Mode resulting in no power ,early shifts.

Jan 30, 2012 | Cars & Trucks

2 Answers

We changed the alternater like four times the battery light wont turn off, we have even check some wire


the plug on the alt will some times go bad usually melting this is normally the cause of this

Feb 14, 2011 | 2000 Ford Focus

2 Answers

Air conditioning causes car to idle or die.


Depending on whether your car is Injected or Carby induction, The aircon system has an IDLE UP circuit which is supposed to raise the Idle while the Aircon Compressor is engaged. The Compressor cycles on & off to charge the system pressure as required. The Idle up system typically uses an IDLE UP SOLENOID which is usually mounted directly on the throttle linkage at the Carby or Throttle body itself, or a Vacuum Solenoid which switches vacuum to a Diaphram which is connected to a linkage on the Carby or Throttle body itself, or a Vacuum Switch which ports air into the throttle body to raise idle (This type on injected vehicles only). It sounds as if the IDLE UP system has failed or is not adjusted properly. Revving the engine spins the compressor faster thus charging the system sufficiently to dis-engage the compressor, which in turn removes the load from the engine, allowing it to idle again. A simple way to test is to disconnect the Aircon clutch wire (make sure it cannot fall into belt) & switch on the Air with the engine running. The RPM should raise typically around 300 RPM. If it doesn't the IDLE UP is not working. Hope this helps.

Dec 07, 2009 | Nissan Pulsar Cars & Trucks

1 Answer

Odorless, colorless, white vapor drifts out of


What you have is humidity.When the air is on,most of this is condensed in the vents.Thats why you see the water dripping on the ground when the car is parked and the air running.If it all doesn,t go out the drip tube it can come through the vent system.Turn the air system onto recirculate for a few minutes and it should fix the problem.It is totally harmless and shows your aircon is working pretty well.Hope this helps

Sep 22, 2009 | 1998 Jeep Cherokee

4 Answers

It won't go over 30 m.p.h.


check your distributor and rotors contacts, any oil in the caps, if oil exist in the distubutor unit, replace the unit. air mass sensors can be faulty, check fuel pump proper pressure. If you need to replace AMS get it from a junk yard. weak fuel pressure can also cause the problems. when you rev the car up under no load does the engine bogs down revving the engine 3500-4000 rpm. something wrong with one of your sensors causing the computer not allowing your engine to run properly or faulty distributor. usually if you plug it in the computer, it will spit out the code and and narrow it down for you. Some dealer charge 45-75 for diagnostic check, worth the money save lots of time and head ace, then you can do your own repair.

Aug 24, 2009 | 1995 Mazda 626

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