Cadillac Seville / Cadillac Eldorado Forum Discussion, ABS pump replacement? in Past Cadillac Vehicle Discussion; hello cadillac enthusiasts! i am new to this site but i am not new to forums. i have just purchased ...
hello cadillac enthusiasts! i am new to this site but i am not new to forums. i have just purchased a 2003 cadillac sls with 130,000 miles. i love the car, it was everything i was expecting out of a cadillac. after replacing the brakes on all four corners (pads and rotors) i had a code abs 1235 i believe? it was a rr wheel speed sensor if i'm not mistaken. i found that i had not clipped up the wire that runs with the parking brake cable. either way that code is gone but i am now getting error codes c1214 and c1248. is there any way the wheel speed sensor failed completely which would create the open circuit code? if not what could it be? i have been reading that it could be the ebtcm, but i figured i would check here before i started to throw money and time at it.
....C1214 - System Relay Contact or Coil Circuit Open.
First things first. And there is no need to apologize.
C1214 can be, and frequently is, caused by a corroded/rusted/oxidized EBTCM pump motor chassis ground connection.
The EBTCM and the associated wire harness can be accessed by removing the bottom air management panel, or the LF wheel well trim. Your choice.
There is an EBTCM pump motor chassis ground wire (black) that exits the side of the motor and is connected to a chassis ground point. That wire should be in place and the connection should be clean, as in making good electrical contact.
hello, i posted a thread about a month ago about replacing an abs module on a 2003 cadillac sls. i have codes c1214 and c1248. they are system relay contact or coil open circuit, and ebcm turned the red brake indicator on, respectively. i have recently replaced my ebtcm module with a salvage yard sourced part to no avail. is there any way that i need to replace the pump and all? is the short that is pulling the code in the pump itself? or is it more likely that the used part is bad?
The system relay is part of the EBTCM (the controller part, not the part with the BPMV and valves).
So by replacing EBTCM the issue should be solved.
Here is what the FSM has to say about it:
The system relay is energized when the ignition is ON. The system relay supplies voltage to the solenoid valves and the pump motor. This voltage is referred to as the system voltage.
The electronic brake control module (EBCM) controls each solenoid valve by grounding the solenoid.
The EBCM controls the pump motor by grounding the control circuit. The pump serves 2 purposes:
Transfers brake fluid from the brake calipers to the master cylinder reservoir during pressure decrease events.
Transfers brake fluid from the master cylinder reservoir to the brake calipers during pressure increase events.
Conditions for Running the DTC
The ignition voltage is greater than 10.5 volts.
The system relay is commanded ON.
Conditions for Setting the DTC
The system voltage is less than 8 volts for 0.23 seconds.
Action Taken When the DTC Sets
If equipped, the following actions occur:
The EBCM disables the DRP/ABS/TCS/VSES for the duration of the ignition cycle.
The ABS indicator turns ON.
The Traction Control indicator turns ON.
The DIC displays the Service Stability System message.
The EBCM will also set DTC C1248.
The red Brake warning indicator turns ON.
Conditions for Clearing the DTC
The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
The system relay is integral to the EBCM. The relay is not serviceable.
I have not seen a ‘00+ EBTCM controller module, but I know that in a ’97 module the relay is TOTALLY serviceable if you have a soldering gun and a T15 bit.
However you mentioned the EBTCM was already replaces and you still get the same codes. This is at least odd. Have you cleared the codes after replacement? I would be hunting for connection issues in the EBTCM connector.
Also the FSM indicates to disconnect the BPMV connector (the small pigtail one) and test the I and H pins (resistance to BPMV case should be 0 Ohm).
Are there any special measures that need to be taken when replacing the pump? I have heard that the old fashioned method of bleeding will not work... I have seen other sites mention that the pump needs to be activated in order to get all of the air out. Right now my car is at least driveable and I dont want to cause any more harm.
The '96+ EBTCM do have the option to automatically bleed the system (if a TECHII is used).
But the old fashion method is the primary procedure for bleeding the brakes (the automated procedure is just a convenient alternative).
So what you hear was WRONG.
Also has NOTHING to do with the codes you get.
There are also bleeding tools, basically a hose attached to the bleeder valve that sucks the air and fluid without the need of having a helper to press the brake pedal. Also not mandatory or better performing, just more convenient.