Trans Shift Lock Clicking When Driving. - P1626

[KWest]

Driving home tonight in D the trans in my car starts to act up. Under light throttle it would lunge into a lower gear, then jump back to the gear it started in. Also the shift lock solenoid would engage.
When parked if I put the car in any gear the shift lock will quickly engage/disengage, not constantly but it will flicker for a few cycles and then 20 seconds later flicker again.

The ECU had the following fault code.
P1626 - 004 - No Signal/Communication - Intermittent

Thanks in advance.

[lswing]

I would assume your clutch packs are toast and needs a rebuild. I never got codes, but was jumping gears, although it was always slipping and revving high then grabbing a higher gear. What was that ecu from, engine or trans or?

Also where you at, and what's the story with your car?

[Elevens]

Electrical in nature. I would assume a loose connection somewhere. Sorry I can't be more helpfull than that.........

[KWest]

Some interesting info the follow this up.

After double checking the TCU connector it was properly seated and all the pins look ok. I cleared all the fault codes and the shift lock would still flicker.

I did some reading about throttle and kickdown adaptations and found some weird data. Engine measuring block 63 showed the field 3 (Kickdown Switch) active at idle, and field 4 (Adaptation) as 10. I ran a throttle adaptation followed by a kickdown adaptation. Kickdown is now blank until 80+% and Adaptation shows ADP OK.

I drove roughly 35kms after doing the adaptations and the car ran perfectly. Part throttle response seems much for defined and the transmission seems to downshift much smoother. I don't know if the above adaptations really helped or if the problem just took a short break.

Thanks again guys.

I'm in Calgary, Alberta and after some looking was able to find a clean Canadian VIN'd car. Canada only got 90 cars so they fairly rare up here. Avus Silver, Silver Interior, Dark Wood (birdseye maple) Trim.

[ben916]

Nice to hear you solved it.
I was thinking a $20 brake light switch was going bad...

[Elevens]

I say its a result of you shaking up that TCU (possible loose connection)..............

[KWest]

I drove another 100+kms today and the car ran perfect. Checked for faults when a arrived home and everything was clear.

I don't know if it was the TCU connection or Kickdown adaptation, either way I'm glad it wasn't the trans itself.

[Bigglezworth]

I'm in Calgary, Alberta and after some looking was able to find a clean Canadian VIN'd car. Canada only got 90 cars so they fairly rare up here. Avus Silver, Silver Interior, Dark Wood (birdseye maple) Trim.New owner? Car have 175000kms on it by chance?