ABS & TCS LIGHTS ON
Thread Starter
Drifting
Joined: May 2001
Posts: 1,726
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From: COCOA Florida
ABS & TCS LIGHTS ON
Hope I can get some trouble shooting guidelines for checking out the TCS and ABS lights. they intermittently set codes
10 PCM 1571 asr desired torque
38 RTD c1780 loss of steering position signal
where do I find a wiring connector diagram to list all the connections to check...anyone else have this problem and a solution.
I disconnect the battery and all is fine for about a week...also it has now turned cold and I am thinking of a bad connection due to the cold weather...where are all the connections located under the car for these two items.
any procedures to check this out I searched Tech docs but to no avail. Thanks in Advance...its a DD so need to correct it soon.
Tom
10 PCM 1571 asr desired torque
38 RTD c1780 loss of steering position signal
where do I find a wiring connector diagram to list all the connections to check...anyone else have this problem and a solution.
I disconnect the battery and all is fine for about a week...also it has now turned cold and I am thinking of a bad connection due to the cold weather...where are all the connections located under the car for these two items.
any procedures to check this out I searched Tech docs but to no avail. Thanks in Advance...its a DD so need to correct it soon.
Tom
Tech Contributor
Joined: Oct 1999
Posts: 41,037
Likes: 9,801
From: Charlotte, NC (formerly Endicott, NY)
Originally Posted by C4TOMCAT
10 PCM 1571 asr desired torque
38 RTD c1780 loss of steering position signal
38 RTD c1780 loss of steering position signal
C1780 is set when the Electronic Suspsension Control (ESC) Module does not receive a steering postion signal from the Electronic Brake and Traction Control Module (EBTCM) for 5 seconds. This should set a Service Ride Control message. The conditions that set this code are an intermittent open or short on the steering position sensor circuit (CKT 914) or intermittent operation of the EBTCM.
P1571 is set when the desired torque signal the PCM sends to the EBTCM is not toggled to ground by the EBTCM thus not setting up a duty cycle. This signal is used by the EBTCM to tell the PCM to cut power (and how much to cut it ) if the EBTCM can not control wheel spin by application of the brakes alone. The PCM will set this code if it doesn't sense the toggling for a period of 3 seconds, the traction control hasn't failed and the engine speed is above 500 rpm. This code will not set a malfunction indicator light.
It is difficult to provide more info since the manual is 1400 pages and there is just too much to try and type in.
Bill
Thread Starter
Drifting
Joined: May 2001
Posts: 1,726
Likes: 1
From: COCOA Florida
Tcs-abs
Bill, thanks for the reply and info...guess I will try to look at all the connections this weekend with the vehicle on jack stands. I disconnected the battery...reset the codes and it did not come back on (lites/codes) for a couple days...do you know what fuse(s) to pull to clear the codes without the battery disonnect as it forces me to reset all my parameters. thanks, Tom
Former Vendor
Joined: Apr 2001
Posts: 10,976
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From: FL
St. Jude Donor '13
Since you have a 97 the EBCM is located under the car behind the rear differential.Simply unplugging the EBCM and reconnecting it will solve common intermittent connections to this module 
Thats were I would start...
You can see the connector to the steering position sensor at the base of the column by simply looking under the dash
Thats were I would start...You can see the connector to the steering position sensor at the base of the column by simply looking under the dash
Thread Starter
Drifting
Joined: May 2001
Posts: 1,726
Likes: 1
From: COCOA Florida
regarding ABS/TCS
C5-Tech
Thanks for the reply...I certainly want to do the easiest to start...I will be cleaning all the grounds this weekend and wanted to do them one by one to diagnose which may, if any, are causing the problem.
Have a Good Holiday...thanks again to all who have replied. Tom
Thanks for the reply...I certainly want to do the easiest to start...I will be cleaning all the grounds this weekend and wanted to do them one by one to diagnose which may, if any, are causing the problem.
Have a Good Holiday...thanks again to all who have replied. Tom
