LMO Theme No 999

Dear Volvo fans, a lot of contributions have already been written about this topic, so many that I no longer have the overview, so here’s my question as follows: With my V70 R AWD (year 1997) the ABS and TRACS OFF lamp is burning permanently since today. After a longer service life (about 4 months), I moved the moose again last Friday, while about 30km were burning the two control lights, I thought spontaneously of a crappy ABS sensor. I thought, great, the problem has been solved. I drove away from home again this morning and the two lights burn again. When the exhaust gas test was done and read out the error memory for a short time, it says that the ABS pump is defective. The error cannot be deleted. I have now read in various articles that even if this is not possible, the error is not correct. the lights no longer run out, the ABS control unit had to be soldered after, or at least the error was on the ABS control unit. And not as diagnosed, the ABS unit or the ABS pump. Normally this error indicates the burning of several lights (including engine control lamp), as well as partly the failure of the speedometer and the emergency running operation, so I also knew it from an earlier V70 of me. Now my question: Are there different symptoms for the same problem? Problem case 1: ABS and TRACS OFF lights burn permanently. Problem case 2: ABS, TRACS OFF and motor control lamp burn, speedometer fails, motor electronics falls into emergency running program. Do both problem cases point to a defective ABS control unit? I don’t want to know now how to fix one or the other problem, but only a qualified statement whether in both cases the same error exists. Thank you very much for your help.