I'm going to get back to it tomorrow.
Service Vehicle Soon
Thread Starter
Drifting
Joined: Apr 2007
Posts: 1,517
Likes: 159
From: Lafayette Louisiana
Service Vehicle Soon
2004 Lemans Commemorative Convertible ...
I had dead battery. Put charger on. When I started got Service Vehicle Soon, Trac light and ABS light. Pulled codes -
P0856 H C - Traction Control Input Signal
TCS - No Comm
U1040 H C - Loss of Class 2 Communications with ABS
My plan:
1) Check Maxi fuse 52
2) Check Grounds at G101 and G104
3) Remove and repair EBCM
Before I dig in, any advice would be appreciated.
I had dead battery. Put charger on. When I started got Service Vehicle Soon, Trac light and ABS light. Pulled codes -
P0856 H C - Traction Control Input Signal
TCS - No Comm
U1040 H C - Loss of Class 2 Communications with ABS
My plan:
1) Check Maxi fuse 52
2) Check Grounds at G101 and G104
3) Remove and repair EBCM
Before I dig in, any advice would be appreciated.
Thread Starter
Drifting
Joined: Apr 2007
Posts: 1,517
Likes: 159
From: Lafayette Louisiana
Dead/weak battery can result in numerous bogus codes. I would insure the battery is fully charged and will hold the charge. I might also have a load test done on the battery. Most car parts places will load test free. Then clear the codes, drive the car and check for codes when you return from the drive. Pull the codes BEFORE you turn off the engine.
Any codes that have returned are the ones that need attention.........
Any codes that have returned are the ones that need attention.........
Thread Starter
Drifting
Joined: Apr 2007
Posts: 1,517
Likes: 159
From: Lafayette Louisiana
Checked fuses, checked grouds, cleaned and reseated connection on ECBM. No change. Same codes, TCS No Comm, Service Vehicle Soon. Trac light and ABS light. What next guys and gals? 
Melting Slicks
Joined: Jul 2012
Posts: 2,507
Likes: 9
Nice color for your car BTW. Examine the connector closely too, make sure nothing's bent/corroded.
Last edited by 3boystoys; Feb 28, 2014 at 02:59 PM.
Thread Starter
Drifting
Joined: Apr 2007
Posts: 1,517
Likes: 159
From: Lafayette Louisiana
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Thread Starter
Drifting
Joined: Apr 2007
Posts: 1,517
Likes: 159
From: Lafayette Louisiana
Ok, got the EBCM off. Next door neighbor is a nurse. She says doesn't think I need a transfusion but to drink plenty of fluids. I'm thinking Budweiser ... Anyway before I break into this gizmo, question about the connectors. Where does it get power? From the two prong connector? And what voltages should I look for?
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Glad you got it figured out.