Year of Manufacture *: 2001
Vin - VF1JA0C225134791
Year - 2001
2.0 petrol auto.
Scantool - Renault Clip
Fault symptom according to the customer –
trans won’t change gear occasionally with the trans lights lit. If it drives right, its perfect.
Customer –
is the type who “just wants it fixed” and doesn’t want to even answer basic questions.
History –
I looked at this car 2 months ago for the same fault. I found the car cranked slowly due to a low battery, but then started. After being run it cranked and ran normally. Battery charged and tested ok. Customer said it hadn’t been lying up or given trouble starting ever, but later changed her mind.
So I think it was lying up for about two weeks and might have been slow to start at least once before I saw it. I mention this because a couple of days later it was slow to crank and dropped into limp again. It appeared that the slow crank and trans limp were connected.
So that leads to my first question, is it common for the trans on these to drop into limp due to low system voltage?
Fault symptom noted by me –
I collected the car. Trans not in limp but didn’t pick up the gears like it should. Slow to change up. No flareing but a little rough on the downshift.
Testing –
Code read. Auto ecu - DF055, injection-auto trans connection. DF048 vehicle speed information (2DEF). DF131 slip. No codes in any other modules.
Checked the codes in Dialogys. No real help there but would suggest CAN error or road speed signal missing.
I cleared the codes and drove it. It was not in limp any more but still not right. As above, not picking up the gears right. I reset the adaptions and drove it again. It drove pretty much perfect. I couldn’t find any fault with it. Checked wiring and ecu connections, all ok. The customer didn’t need it back in a hurry so I kept it a few days and used it myself. The fault didn’t happen again, no fault codes returned, so I assumed it was due to low voltage and gave the car back.
After being ok for 2 months it has happened again. It seems the symptom is the same but I haven’t seen it give trouble.
Code read. Auto trans ecu - DF048 (DEF3). No codes in any other modules.
If low voltage would cause this maybe a bad battery even though it tests ok? I will probably recommend a new battery.
Lack of road speed signal could cause this or maybe DF048 is a red herring. I will update the trans ecu software. There is no option to update the ABS.
Anyone seen this before or any suggestions?
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