In an effort to hunt down the cause of my "service TCS and ABS" light, it was suggested that I check/clean the ground G401 in the driver's side rear section of the car. I looked there last night and could not locate it. I was able to easily find the passenger side rear ground on the frame rail. Does anyone have a picture or can describe to me where the G401 ground is located?

Thank you!

 

not sure if its the same one but there is a ground on the rear frame you can see if you look through the tire well, right about in-line w/ the side reflector....

 

I did find a simple loop-ground thing on that side. Was that the G401 ground? I removed and cleaned it last night, but it didn't solve my problem when I started it up this morning.

Thanks!

 

I might have given you duff info. G401 is for 1997 & 1998. G101 is for later cars.

G401 rear of car, on the outer side of the LH frame rail.
G101 on the frame rail between the LH headlamp assembly and the generator.

 

So would you gain access to the G101 from the top or the bottom of the car?
Pictures would be great if available.

Thanks a ton for the info!

 

Look at Bill Curlee's electrical problems solver. G101 is part of one of the multi-connectors. It's on the top of the frame rail, you can't miss it.

 

I will send you ALL the info that you need later tonight!!!! Im at work and dont have access to my photobucket account.

The EBTCM ground is at g-101 and is accessable from the top. Its next to the hydraulic hood support bracket.

Bill

 

Great, THANKS!!
I wish I could get Bill shipped to my garage for a day. It would be nice to have ABS working again.

Thanks again!

 

If you have a 97 or early to mid year 98, your EBTCM is locater in the rear on the back of the Differential.





For late year 98 to 2004 the EBTCM is located in the engine compartment, on the drivers side between the engine and the radiator. Look below the radiator hose.



Module removed from the BPMV



There are more than one ground for the EBTCM circutery. One of the grounds is at Chassis Ground G-101.





The ground for the EBTCM is the single eyelet below the main ground plug. While you ave the main ground plug off, might as well clean it too>





The other Ground g-104 on early C5's and G-108 on later C5's is inboard of the battery on top of the frame on a single stud.



Hope that helps

BC

 

Looking good!
I'll keep these handy this weekend.

Thanks again!

 

You can tell from the pics that Bill's a desk jockey

 

This is from the '02 version of the manual.

 

No,,,, I work on US Navy Submarines all day! A SUB Jockey might be a better definitation.

BC

 

Well crap. I cleaned the grounds at #7 and #8, per Patches' illustration (thanks Patches!). I cleared the codes and started the car, and the codes came back.
So I guess my problem must lie somewhere else.

 

Here is info. from the manual. Send Bill Curlee a PM he will sort you out.


C1243





CIRCUIT DESCRIPTION
When the pump motor relay is grounded by the Electronic Brake and Traction Control Module (EBTCM) , it closes and provides battery voltage to operate the pump.

CONDITIONS FOR SETTING THE DTC
Diagnostic Trouble Code (DTC) C1243 can be set when the pump motor relay has been commanded off after the pump motor has been on. A malfunction has occurred if the pump motor was on, and the Electronic Brake and Traction Control Module (EBTCM) sensed a stuck or slowly turning pump motor.

ACTION TAKEN WHEN THE DTC SETS
ABS/TCS/Active Handling (if equipped with RPO JL4) are disabled.


Indicators that turn on:
ABS indicator
Car Icon (TCS indicator)
Messages displayed on the Driver Information Center (DIC) :
Service ABS
Service Traction System
Service Active HNDLG (if equipped with Active Handling RPO JL4)
CONDITIONS FOR CLEARING THE DTC


Condition for Diagnostic Trouble Code (DTC) is no longer present and Scan tool clear DTC function is used.
Fifty ignition cycles have passed with no DTCs detected.
DIAGNOSTIC AIDS


It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
An intermittent malfunction can be caused by poor connections, broken insulation, or a wire that is broken inside the insulation.
If an intermittent malfunction exists refer to Testing for Electrical Intermittents in Diagnostic Aids.
TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.


Checks for good pump motor ground.
Checks for good pump motor ground through the Brake Pressure Modulator Valve (BPMV) .




DTC C1243 BPMV PUMP MOTOR STALLED

 

Yeah! I'm a retired (30 yrs) submariner who spent 69-71 at EB aboard 632fish. You are clearly the most valuable poster here. DBD

 

DBD

I sprnt 15 years on 616 class Boomers and four years on SSN-755 (Mighty Miami)
Us retarded %$%@* I mean retired guys need to stick together.
26 years Retired Navy ( FTCS (SS) )

Bill

 

i top you both i spent 2 months in the boys scout