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Pulled code P1633, keep alive memory volt low, checked fuses all good. is there a relay or fuseable link i need to look for?

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Posted on Jan 02, 2017

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SOURCE: fuseable link

Hi and welcome to FixYa,

In most Japanese brands, the fusible link is the short wire right after the battery that goes to a connector. Often, the battery + terminal has 2 wires; 1 very big that goes to the starter and another the feeds the fusebox. This 2nd wire from the + terminal is the fusible link.

Often fault with the fusible link is a corroded or burned connector/pin.

Good luck and thank you for using FixYa.

Posted on Feb 04, 2009

  • 109 Answers

SOURCE: no power to the coil or to the electric fuel pump.

The ASD relay provides the power to coil and pump, it needs to see a few things, 1, needs crank sensor signal, 2, needs dist signal, both of these sensors are commen to failure, scan tool can be helpful here to monitor data, also voltmeter is helpful to, just back probe the sense return signals at the PCM connectors. Also these trucks had a harness problem on left side fender area near the PDC relay box that feeds the ASD relay pin 87, ( this should light with a test light, key on,) open circuit in the harnes, has to be cut open to check. you can also jump this relay, pin 87 to 30, 87 being J2 ign feed, 30 going to coil and pump being a 1990 truck remote stater should not be a issue, unless it was just put in, then just unplugg it. GOOD LUCK. RDJRP

Posted on Aug 16, 2009

  • 677 Answers

SOURCE: I have a 91 dodge ramcharger,it doesnt charge the

With a volt meter what kind of voltage is the alt pushing ? Is the battery good ?

Posted on Feb 04, 2010

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SOURCE: I have 1998 dodge ram

Here is three common problems I have found with rams over the years that can cause this problem. #1 Crank Sensor #2 Pick up coil #3 coil . I would put money on one of these things is your problem as long as you can hear your fuel pump working. If the fuel pump is not working and it has no spark it is a problem with your computer or a connection to your computer. If this help you 4 thumbs up is appreciated.

Posted on Dec 01, 2010

  • 11 Answers

SOURCE: i have code p1633 keep

I ahve gathered this information from the web...This can be an inexpensive or expensive problem!

Suspect the battery is chronically low; not accepting a charge and needs to be replaced.
The power cables from the battery may be corroded. These should be removed cleaned and retightened.
Check the wiring harness and connections to the Power Train Control Module. Use a contact cleaner/ lubricant and a brush to clean these connections then reseat them firmly. Also make sure there are no chipped or frayed wires as it travels through the engine compartment.

Check all the fuses and other components in the fuse box and the battery junction box to make sure they are in place firmly seated; fuses are good and clean from any corrosion on the clips. The location of these boxes is in your owners manual.

Alas it may be the PCM itself. That should be replaced by a mechanic.

Hope that helps

Posted on Mar 08, 2011

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What Is a fix for a P1633 on an 02 ford F150 4.6L TROUBLECODE will not clear

P1633 means that the powertrain control module (PCM) has detected low voltage on the keep alive memory circuit. This is the circuit that supplies constant battery voltage to the keep alive memory portion of the PCM so it can retain information regarding fuel control, idle control and transmission control adaptive strategies to name a few. If the battery is disconnected or voltage drops below 10.5 volts this code will be set. If the battery has not been disconnected then the circuit will need to be checked for opens or high resistance in the wire,shorts,blown fuse, high voltage r/f interference from ignition or charging system components, or the PCM being being faulty itself

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Mercury sable 2002 engine light stay on error code p1633 how do i fix this issue

This has to do with voltage falling too low for "Keep Alive Memory" (or KAM) to the PCM. First check the battery voltage, terminals etc. After that it could be anywhere in the wiring harness. See the link below for add'l help

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2001 ford Taurus code P1633 what does it mean and how do I fix it ?

P1633 - Keep Alive Power Voltage Too Low

Indicates that the Keep Alive Power (KAPWR) circuit has experienced a power interrupt.

Possible causes:
-Open KAPWR circuit.
-Damaged PCM.
-Intermittent KAPWR Circuit.

First thing would be to check the fuse associated with the KAP. In your case, that would be fuse #22 (10A). If you're A/C doesn't work, then that's why. Usually the A/C clutch causes the fuse to blow and your get your P1633 code.

If the fuse is fine and the A/C works, then it might be a bad PCM. If the battery was bad before it might have set this code. Have you tried clearing the codes to see if it comes back or not?

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p1633 keep alive memory test failure

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Error codes for reader p1633 2005 F250

P1633 definition is Keep alive power,This can be generated when you have a interruption to the ECM memory,this can be caused by a bad battery connection,or a open fuse to the KAPWR (keep alive power)

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I have a 2003 ford taurus 3.0 engine and everytime i use the ac or heat i blow a fuse and engine light comes on with p1633 code

Put OBD2 P1633 into google for the answer

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find & print out

Sep 15, 2012 | Cars & Trucks

1 Answer

Check engine light

Ford code P1633: Keep alve memory voltage low.
It means the voltage going to the computer fell below about 10.5 volts to set the code.
Have you experienced battery problems recently? Or had the battery disconnected?
Things to check for: bad battery, low alternator output, battery cables, and power and ground circuits to computer,
Hope you find it, good luck.

Dec 02, 2011 | Volvo V70 Cars & Trucks

1 Answer

How do i fix this error code

Keep Alive Memory voltage too low. Usually the fuse for the PCM, engine computer. Check fuses. Owners manual has chart.
This is to keep voltage to your computer when you shut the engine off, so the computer does not lose it's memory.

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Code p1633 keeps coming up on check engine light how to fix it


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2001 for tarous code p1633 what does that mean

P1633 means KAM (keep alive memory) power is low. The power that goes to the vehicles computer to hold its memory when the key is off has lost its power. I would start by checking fuses in the fuse panel in the engine compartment(near the radiator support). If the fuses are all good then I would test for power at the computer connector which is also in the engine compartment behind the engine. I don't have the pin number or wire color at the moment (I apologize) since the Ford website is down at the moment. I have repaired this problem in the past by installing another power wire to feed the circuit essentially bypassing the original circuit.
Hope this helps

Apr 04, 2010 | 2001 Ford Taurus

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