tach and speedo dont work dtc p1339

[caddidaddy55]

I was looking at a car for my daughter 2000 SLS relly clean car the tach and speedo were not working and I pulled DTC P1336 - Crankshaft Position System Variation Not Learned. Is there a single sensor that would cause all this or what

[BodybyFisher]

If I were you I would disconnect the negative battery cable for a couple of minutes and then reattach it, maybe they replaced a crank sensor. Typically a relearn with a TECH 2 is not necessary, the system will relearn on its own. The code you have is not common. Disconnecting the battery may cause the system to reboot and relearn. If when you do that, you still have the code, you may need to visit a dealer with a TECH 2 and let them do a relearn

DTC P1336 Crankshaft Position (CKP) System Variation Not Learned

Circuit Description

The crankshaft position system variation learning feature is used to calculate reference period errors caused by slight tolerance variations in the crankshaft, and the crankshaft position sensors. The calculated error allows the PCM to accurately compensate for reference period varations. This enhances the ability of the PCM to detect misfire events over a wider range of engine speed and load.

The PCM stores the crankshaft position system variation values after a learn procedure has been performed. DTC 1336 set indicates that the crankshaft position system variation values have not been stored in the PCM and the crankshaft position system variation learn procedure must be performed. The learn procedure is required after the following service procedures have been performed, regardless of whether or not DTC P1336 is set:

• PCM replacement.
• PCM reprogramming.
• Engine replacement.
• Crankshaft replacement.
• Crankshaft position sensor replacement.
• Any engine repair that disturbs crankshaft to crankshaft position sensor relationship.

Conditions for Running the DTC

• CMP sensor, or CKP sensor DTCs are not set.
• The engine coolant temperature is more than 70°C (158°F).

Conditions for Setting the DTC

The crankshaft position system variation values are not stored in the PCM memory.

Action Taken When the DTC Sets

• The PCM will illuminate the malfunction indicator lamp (MIL) the first time the malfunction is detected.
• The PCM will store conditions which were present when the DTC set as Freeze Frame/Failure Records data.

Conditions for Clearing the MIL/DTC

• The PCM will turn the MIL OFF after the third consecutive trip in which the diagnostic runs and passes.
• The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
• The DTC can be cleared by using the scan tool Clear DTC Information function.

Diagnostic Aids

The crankshaft position system variation compensating values are stored in PCM memory after a learn procedure has been performed. If the actual crankshaft position variation is not within the crankshaft position system variation compensating values stored in the PCM, DTC P0300 may set (refer to Diagnostic Aids for DTC P0300).

[caddidaddy55]

Yes, thanks for the info on the dtc I was not aware you could reset it by disconnecting the battery cable. What about the tack and speedo not working? the rest of the gauges and lights worked. I tried pulling the inst fuse on my 2000 SLS but all the gauges and lights went out.

[BodybyFisher]

It is possible that all the problems you are having are related to the system needing to 'reboot' try disconnecting the negative cable for a couple of minutes, reconnect and see what happens

[JimD]

Yes, thanks for the info on the dtc I was not aware you could reset it by disconnecting the battery cable.

If by "reset" you mean clearing the code{s}, disconnecting a battery cable is not a recommended method because that action will not consistently clear each and every type of code.

You didn't say how you were able to display your P1339 and maybe you are not aware that ALL of your year model codes can be displayed on the DIC. You also have the option of ALL CLEAR CODES? with this method. Here's how:

http://www.caddyinfo.com/readingcodes.html

[caddidaddy55]

I used an obd II code reader, and I could have used it to clear the code, but not to force a relearn. I didn't mess with it though because it wasn't my car. I knew about the obd on the older obd I cars, but wasn't aware you could still do it on the newer cars. Thanks for the info.

[BodybyFisher]

I suggested to disconnect the battery to force a relearn, not to delete the code that was set. As Jim noted the proper way to delete codes is preferrable.

As Jim noted in that link you do NOT need a code reader to extract your codes, your code reader will only pull P codes where as your ON BOARD diagnostic system will pull all codes including U network codes

[WarrenJ]

Yes, thanks for the info on the dtc I was not aware you could reset it by disconnecting the battery cable. What about the tack and speedo not working? the rest of the gauges and lights worked. I tried pulling the inst fuse on my 2000 SLS but all the gauges and lights went out.

Both engine speed and vehicle speed signals are sent to the IPC (Instrument Panel Cluster) from the PCM in the engine compartment under the air filter housing. Something as simple as re-seating the two electrical connectors on the PCM (with the battery disconnected!) might solve your problem. Basically there are three things to look at:

1] The PCM (my gut says no problem here).

2] The IPC (yeah, a possibility).

3] The wiring/connectors between the IPC and PCM (that would be sweet... and cheap).

Regards,

Warren

EDIT: The wiring from the PCM to the IPC takes a rather circuitous route. If you're going to pursue this let me know. I will provide you with info about the connector descriptions and locations.

[caddidaddy55]

Hey guys, thanks for all your input. The car has been sold now so I guess I will never know for sure.