Finally happened to me on hot/humid day on drive to work: Limp mode which went away after car cooled off for drive home. Pretty sure it's the 2001-2204 CEM overheat issue and want to do the chip heatsink and shield removal. I think the size for the big chip is 22mm as mentioned in posts, but what is the size for the flash chip others have mentioned but didn't see a size for it. Want to do both while I'm in there. Might even put in the box fan for good measure since it's already exhibited problems.
Thanks for the great inputs!
J.D.
What size heatsinks do I need for CEM?
-
volvolugnut
- Posts: 6233
- Joined: 19 January 2014
- Year and Model: 2001 V70
- Location: Oklahoma USA
- Has thanked: 927 times
- Been thanked: 1000 times
Did you get codes when went into Limp mode? I have been having limp mode on hot days on 2001 V70, have not heard that 2001 models had known CEM over heat issues. My codes indicate a problem with Canbus signal to ETM.
The Fleet:
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
-
volvolugnut
- Posts: 6233
- Joined: 19 January 2014
- Year and Model: 2001 V70
- Location: Oklahoma USA
- Has thanked: 927 times
- Been thanked: 1000 times
For heat sink size and details see:
https://www.volvoxc.com/forums/showthre ... 04-CEM-CPU
Lots of info here on what and where to buy.
For my situation, after many times of hot start failures and limp mode, I will be getting Xemodex to remanufacture my CEM. Today it failed to idle without surging after cooling over night at CEM temperature of only 74F. I removed the CEM this morning and contacted Xemodex.
volvolugnut
https://www.volvoxc.com/forums/showthre ... 04-CEM-CPU
Lots of info here on what and where to buy.
For my situation, after many times of hot start failures and limp mode, I will be getting Xemodex to remanufacture my CEM. Today it failed to idle without surging after cooling over night at CEM temperature of only 74F. I removed the CEM this morning and contacted Xemodex.
volvolugnut
The Fleet:
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
-
abscate
- MVS Moderator
- Posts: 35293
- Joined: 17 February 2013
- Year and Model: 99: V70s S70s,05 V70
- Location: Port Jefferson Long Island NY
- Has thanked: 1503 times
- Been thanked: 3817 times
Thanks for digging up that’s post, lugnut
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
-
- Similar Topics
- Replies
- Views
- Last post
-
- 4 Replies
- 1313 Views
-
Last post by packetfire
-
- 5 Replies
- 8719 Views
-
Last post by forumoto