Question about 1996 Oldsmobile Aurora

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REPLACED STEERING COLUM

WONT START NOW , CHECK FOR CODES FOUND P0603 , PCM MEMORY RESET

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You May need to Use The Old Ignition Lock & Key ,Due to the Chip In the Key.


Circuit Description

The PCM has a memory area where it stores certain data it needs to save when the key is turned OFF. This area is called Keep Alive Memory. This diagnostic test monitors the PCM's keep alive memory for a loss or unintended change of data. If such a condition occurs, DTC P0603 will set.

Conditions for Setting the DTC

Test Condition


Test continuously.

Failure Condition

Keep alive memory checksum does not match previous checksum.

Action Taken When the DTC Sets

  • Clear all keep alive memory locations.
  • The Malfunction Indicator Lamp (MIL) will not illuminate.
  • No message will be displayed.
Conditions for Clearing the DTC

  • A History DTC will clear after forty consecutive warm-up cycles with no failures of any non-emission related diagnostic test.
  • A Last Test Failed (current) DTC will clear when the diagnostic runs and does not fail.
  • PCM battery voltage is interrupted.
  • Using a Scan tool.
Diagnostic Aids

If the battery has been disconnected for any reason DTC P0603 will set. The PCM keeps a running check on the memory; if memory changes it resets. An intermittent loss of power or ground to the PCM will cause a reset.

Posted on Feb 07, 2009

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I have 2000 mustang 3.8 n it shakes really bad n code p1633 comes back. Whats wrong n how do i fix it


Hello Paige ! It sounds like you have a sick vehicle , lets see if I can help you fix it . Well the code you have has to do with lack of voltage to the ECM -engine control module.
P1633 - Keep Alive Power Voltage Too Low Indicates that the Keep Alive Power (KAPWR) circuit has experienced a power interrupt.
  • Open KAPWR circuit
  • Damaged PCM
  • Intermittent KAPWR Circuit
2000 PCED On Board Diagnostics II SECTION 5: Pinpoint Tests Procedure revision date: 01/31/2001 QB: Diagnostic Trouble Code (DTC) P0603/P1605/P1633 > QB: Introduction QB1 CHECK BATTERY TERMINALS
    Note: If KAPWR is interrupted to the PCM (that is, when a breakout box is installed or the battery is disconnected), DTC P0603/P1605 can be generated on the first power-up.
  • Inspect the battery cables for loose connections, corrosion.
Are the battery terminal connections in good condition? Yes No KEY OFF. Battery terminals are OK. GO to QB2 . REPAIR battery terminals as necessary. QB2 INSPECT ENGINE COMPARTMENT FOR PROPER WIRE ROUTING
  • Inspect Electronic Engine Control (EC) System wiring for proximity to ignition components or wires.
Is wiring too close to ignition components or wires? Yes No REROUTE as necessary. Engine compartment wire routing is OK. GO to QB3 . QB3 CHECK KEEP ALIVE POWER (KAPWR) TO PCM
    Note: Refer to the PCM connector pin numbers in the beginning of this pinpoint test.
  • Disconnect PCM.
  • Measure voltage between KAPWR circuit at the PCM harness connector and ground.
  • While observing digital multimeter, grasp the Electronic EC harness and wiggle, shake or bend a small section while working from the PCM to the dash panel.
Does the voltage reading indicate less than 10.5 volts? Yes No ISOLATE and REPAIR open circuit. No open in KAPWR harness circuit detected. GO to QB4 . QB4 CHECK FOR REPEAT OF DTC P0603/P1605/P1633
  • Reconnect PCM.
  • Start engine and allow it to reach operating temperature.
  • Run Key On Engine Off Self-Test.
  • Retrieve Continuous Memory DTCs.
Is DTC P0603, P1605 or P1633 present? Yes No REPLACE the PCM. REPAIR other DTCs as necessary. If none, testing is complete. You may want to take this to the repair shop , do you own a volt ohm meter ? Do you know how to use one ?

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1 Answer

Trouble shooting P0603 for 98 aurora is this why


Code P0603 means that the PCM's Keep Alive Memory (KAM) self test is failing. This is a routine self test that is performed periodically through out the day. This is critical because the PCM's Keep Alive Memory Modules store all of the PCM's adaptive calculations that need to be 'kept alive' or saved when the vehicle isn't operating. If this part of the PCM's functionality is unreliable, the powertrain's main computer can't be trusted to accurately do its job and may need to be replaced.

Sep 23, 2014 | 1998 Oldsmobile Aurora

1 Answer

P0603 code


I dont think you have a choice? i would Disconnect the battery, & check codes again after. If i have doubts, i alwyas start with the least exspensive parts first.

Apr 19, 2014 | 1997 Oldsmobile Aurora

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1997 cadillac deville wont accelerate past 15- 20 mph here are the codes i pulled DTC P0603 Control Module Long Term Memory Reset DTC B1552 Keep Alive Memory (KAM) Error DTC B1341 Air Mix Door Two...


P0603 - GM Type Powertrain - Computer and Auxiliary Outputs - ISO/SAE Controlled Description Control Module Long Term Memory Reset Conditions
Cause DTC P0604 not set, key on, then the PCM determined that its calculated checksum that did not match a previous checksum • Refer to code repair chart for instructions on how to replace a PCM and how to reprogram the replacement
or you can ask the 24 hrs live technical support obd2 bmw icom, they will like to help you, good luck

Aug 28, 2013 | Cars & Trucks

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Were is the k.a.m fuse on a 99 mercury cougar


that code is for the keep alive memory for the pcm. By itself this will not cause a no start situation. this code is kicked out when the keep alive power supply is interrupted. Check you battery terminals and clean them. Check ALL your fuses next. If all that checks out then off to a shop you go because they will have the knowledge and equipment to deal with a problem like this one. Good luck

Mar 22, 2013 | 2003 Ford F350 Super Duty DRW SuperCab

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How to fix code P0603 code on 1996 cadillac eldorado


P0603 - Internal Control Module Keep Alive Memory Error

Possible causes- Loose or poor battery terminal connection
- Low battery charge
- ECM/PCM power supply circuit is open or shorted
- ECM/PCM Programing
- Faulty ECM/PCM

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LOSS OF THROTTLE POWER AND GAUGES ON 2003 FORD F350 SUPERDUTY CODE P0603


po603 is pcm keep alive memory error. either have pcm tested or replace pcm. because the pcm is at fault.

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2 Answers

P1211 and P0603 codes have come on after installing superchip


Hi,

For P1211 :-

This code means the ICP pressure is aove or below specs meaing there is a high pressure oil concern. You need to monitor the ICP with a scan tool and see which it is. If its high then its most likely a faulty IPR valve. If its low then its most likely a internal leak at the pump or stand pipes.

For P0603 :-

The code P0603 is in ost case set due to the performance chip.
If equipped, remove and recheck operation.

If the vehicle is not equipped with a chip, or removing it makes no difference, monitor the voltage on fuse #22 in the interior fuse panel to see if the battery voltage goes away when the problem occurs.

If the voltage on fuse #22 is dropping or going away, check for a loose terminal connection on the PCM power relay. Also try swapping the PCM power relay with a similar part to eliminate a faulty relay.

If the relay is OK, but the voltage on fuse 22 is dropping, suspect an internal problem with the interior fuse panel.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

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96 aurora P0603 and P0300 codes


The battery must have been disconnected at some time to set po603 keep alive memory. You will need a scan tool to reset computer.

May 23, 2009 | 1996 Oldsmobile Aurora

1 Answer

HAD STEERING COLUM REPLACE , USED SAME IGN SWITCH WON`T START , CODE P0603 PCM MEMORY RESET


It Aslo May Need to Relearn--Turn Key on for 10 minutes then Off for 30 Secs then Turn it Back on for 10 Mins Do this 1 More time this should let the ECM RELEARN itself

Jan 25, 2009 | 1996 Oldsmobile Aurora

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