My 2k2 auto has the 1-2 shift SLAM and sometimes on the 2-3, but not as hard. It feels like the slipping, but I have a hard time believing all our transmissions are slipping. I have a feeling it is a computer/electronics screw-up.

Does anyone know how to reset the TCM (not the ECM, the Transmission control module)??

Other than taking off the battery cables for like a week...

ARFF

PS. I am a non-searching low-life.

 

i have the same problem on my 00. i got a new tranny a few months ago so i know its not that. during WOT there is a slight pause then SLAM into second. shift is fine during normal driving.
so im pretty sure mine is also my TCM. it isnt telling the tranny to shift properly. i dont know if you can reset it though

 

Funny story - My car was doing exactly what yours is doing now. I took it in for some gen maintenance a couple of weeks ago, had the ATF done. Car has 34K miles. The service was done at a Nissan dealer.

After the service, the 1-2 hard shift was gone. Then last Friday 30th January, driving home, the trans would start out in third gear for some reason, and my reverse gear was out...I took it into the Nissan dealer where I had my ATF done, and they diagnosed the problem as malfunction w/solenoids, causing internal damage with 1st and 2nd gear (I will get all the specifics when I get the car back this Friday...).

They are warrantying the entire job through NNA, and are replacing the entire trans now, since the damage done was irreparable. I hope this doesn't happen to you. Have the solenoids checked, make sure your ATF fluid is not burnt when you have a look at your dipstick.

BTW, it sucks having to drive a Sentra loaner. No b a lls!

 

Here's how to read the error codes and to reset the TCM. Please use a stopwatch for accuracy.

Please NOTE that you DO NOT START THE CAR in any step other than step 2. Serious injury or death could occur from not following the instructions exactly.

1) Move shifter to Park
2) Start engine and let it warm up to normal operating temperature (please do this in an open-air environment, so as not to risk serious injury or death)
3) Turn key to the OFF position
4) Wait 5 seconds
5) Turn key to the IGNITION position, but do not start car
6) A/T CHECK light should come on for about 2 seconds
7) Turn key to the OFF position
8) Turn key to the ACC position
9) Press and hold the accelerator pedal to the floor (100% WOT)
10) Press brake pedal and move shifter into Drive (D)
11) Turn key to the IGNITION position (DO NOT START THE CAR)
12) Wait 3 seconds
13) Move shifter to 2nd gear
14) Release gas and brake pedal
15) Move shifter to 1st gear
16) Press and hold the brake pedal
17) Press and release the gas pedal
18) The A/T CHECK light should flash ON and OFF - Refer to the chart below for explanation of the flashes. Depending on the sequence and timing of the flashes, you can determine what problem, if any, the TCM is reporting.
19) After discovering what the problem is, put the shifter in Park and turn off the car
20) When you turn on the car, the TCM will be reset. You may need to reset the ECU to clear any SES codes that are stored.

-----------------------

Scenario 1) All judgement flickers are the same = Everything is OK
Scenario 2) 1st judgement flicker is longer than others = Revolution sensor circuit is shorted or disconnected
Scenario 3) 2nd judgement flicker is longer than others = Vehicle speed sensor circuit is shorted or disconnected
Scenario 4) 3rd judgement flicker is longer than others = Accelerator pedal position sensor (or throttle position sensor) circuit is shorted or disconnected
Scenario 5) 4th judgement flicker is longer than others = Shift solenoid valve A circuit is shorted or disconnected
Scenario 6) 5th judgement flicker is longer than others = Shift solenoid valve B circuit is shorted or disconnected
Scenario 7) 6th judgement flicker is longer than others = Overrun clutch solenoid valve circuit is shorted or disconnected
Scenario 8) 7th judgement flicker is longer than others = Torque convertor clutch solenoid valve circuit is shorted or disconnected
Scenario 9) 8th judgement flicker is longer than others = A/T fluid temperature sensor is disconnected or TCM power source circuit is disconnected
Scenario 10) 9th judgement flicker is longer than others = Engine speed signal circuit is shorted or disconnected
Scenario 11) 10th judgement flicker is longer than others = Power train revolution circuit is shorted or disconnected
Scenario 12) 11th judgement flicker is longer than others = Line pressure solenoid valve circuit is shorted or disconnected
Scenario 13) 12th judgement flicker is longer than others = CAN communication line is damaged
Scenario 14) The light stays off = Park/neutral (PNP) switch, 3rd position switch, closed throttle position signal or wide-open throttle position signal circuit is shorted or disconnected
Scenario 15) The light flickers at steady pace, but goes from lighted to dim to lighted (and keeps repeating) = Battery power is low, battery has been disconnected for a long time, or battery is connected conversely

DISCLAIMER: I have not in any way tested this procedure. Please use extreme caution when performing this procedure. I am in no way responsible for damage to or damage caused by you or your vehicle while performing this procedure. This information is for educational purposes only, and should be used at your own discretion and risk.

 

Holy crap!! How do you find these things out? Mods, This should be stickied.

You da man, studman!!

 

No kidding! NIce post and thanks for the info...I am going to try this and see if the 1-2 shift "delay and slam" goes away. Will update in a week or so to let you guys know.

JP

 

im assuming this will work on 00/01 too. pretty sure its the same TCM

 

After your step 8, I am supposed to shift the shifter to D while stepping on the brake. My car will only let me shift when the key is in the RUN position, not in the ACC position. Is there an error there? Please double-check your steps and let me know!!!

Also PM'd you, studman.

Thanks,
Jeremy

 

According to the service manual, it says not to turn the key over to IGNITION until after you have put the car in D.

In the ESM, this is in the AT section on pages 53-58.

 

You are correct, it is in there. Hmmmm....my shift lever will NOT move unless the key is in the RUN position (with dash lights on).

Later in the ESM it even says it won't work any other way. Oh well....

 

i just installed a grounding kit. shifting is much more smoother now. especially when the engine is cold. purchased mine from MATT93SE.