How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask jwtruck76 Your Own Question
jwtruck76
jwtruck76, Technician
Category: Car
Satisfied Customers: 39
Experience:  17 Years Experience Auto/Heavy Truck Repair
11929435
Type Your Car Question Here...
jwtruck76 is online now
A new question is answered every 9 seconds

99 volvo S70 glt: 000 mi..first the speedometer/odometer..stop working

Resolved Question:

99 volvo S70 glt 2435cc 80,000 mi. Daughters cummuter car for college. Recently, and suddenly at first the speedometer/odometer would intermittantly stop working. Soon, on the dash, the arrow pointing up began flashing. She says it is the overdrive arrow. I have no book yet, and the check eng light came on as well as the ABS, and traction control lights, and the transmission began slipping only from a standing start. This is all in a one week period. All fluid levels are good and fluids look good. Could these be related problems, and what can I check/replace/try to remedy? I have extensive mechanical experience, but not with computerized systems.
Submitted: 8 years ago.
Category: Car
Expert:  jwtruck76 replied 8 years ago.

Hi,

All of these problems are linked to the TCM (Transmission Control Module). You will have to have a scan tool connected to verify.

jwtruck76 and 4 other Car Specialists are ready to help you
Customer: replied 8 years ago.
thanks for the info. I'd be inclined to just replace the TCM, if it's not a major project and hope for the best, XXXXX XXXXX a scan tool. Would you think this is a pretty safe bet and is it major surgery?
Expert:  jwtruck76 replied 8 years ago.
No, it's a fairly simple process. There should be two wiring harnesses and one nut attaching the TCM to a mounting bracket. The one real downside is the confined space you have to work in. To save yourself some money, you can purchase a used BCM from your local salvage yard. In the unlikely event this is not the problem, you can return the part (an option you do not have with a new one).
jwtruck76 and 4 other Car Specialists are ready to help you
Customer: replied 8 years ago.
I'm told (still haven't located even a Chiltons manual) that it located in the rt front eng compartment in that mysterious black box with the cooling hose. I've located one from a wreck on ebay for $75. They go for about $400 new. Q: Can I unhook and look at the contacts, before buying the part, without causing some problem with a computer? What would be the procedure to replace? Just unhook and replace? Thanks
Customer: replied 8 years ago.
I'm told (still haven't located a repair manual) that it is located in the rt front eng compartment in the black box with the cooling air hose. I've located one from a wreck on ebay for $75. They are about $400 new. Q: Is there a special procedure to unhook, replace this part, being as it sends signals to a computer, or is it a simple unhook, rehook thing? Thanks for your help.
Expert:  jwtruck76 replied 8 years ago.

Hi,

Sorry it took me so long, had a computer meltdown. Let me see if I can get an exact location. If you have located it, you can simply unhook and rehook. Just make sure you disconnect the negative battery cable first and reconnect after.

 

jwtruck76 and 4 other Car Specialists are ready to help you

Related Car Questions