GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Park Avenue 🢒 Brakes 🢒 Antilock Brake System 🢒 No Communication with Electronic Brake Control Module/Electronic Brake and Traction Control Module

Object Number: 397518 Size: MF
ABS Components
Cell 44: Power, Ground, EBCM/EBTCM, BPMV Motor and Solenoids
Handling ESD Sensitive Parts Notice
Cell 10: IGN SEN, ABS, RR DEFOG and AUXOT LT Fuses
Cell 10: Battery Power Circuits to Fuse Blocks (1 of 2)

Circuit Description

The Class 2 serial data line allows all the modules on the line to transmit information to each other as needed. Each module is assigned an ID and all the information sent out on the line is assigned a priority by which it is received. When the ignition switch is turned to the RUN position each module begins to send and receive information. Each module on the Class 2 serial data line knows what information it needs to send out and what information it should be receiving. What the modules do not know is which module is supposed to send them the information. This information is only learned after the module has received the information it needs along with the ID of the module that sent the information. This information is then remembered until the ignition switch is turned off.

No Communication with EBCM/EBTCM

Step

Action

Value(s)

Yes

No

DEFINITION: Scan tool can not communicate with the EBCM/EBTCM.

1

Was the ABS Diagnostic System Check performed?

--

Go to Step  2

Go to Diagnostic System Check

2

Turn the ignition switch to the RUN position with the engine off.

Can the scan tool communicate with other modules on the Class 2 serial data line, such as the PCM?

--

Go to Step  3

Go to Scan Tool Does Not Communicate with Class 2 Data Line in Wiring Systems

3

Inspect the 10A ABS SEN fuse in the IP fuse block.

Is the fuse OK?

--

Go to Step  4

Go to Step  9

4

Inspect the 40A ABS SOL fuse in the underhood maxifuse block.

Is the fuse OK?

--

Go to Step  12

Go to Step  5

5
  1. Install a new ABS SOL fuse.
  2. Recheck the fuse.

Is the fuse OK?

--

Go to Diagnostic System Check

Go to Step  6

6
  1. Turn the ignition switch to the OFF position.
  2. Remove the ABS SOL fuse.
  3. Disconnect the EBCM/EBTCM connector.
  4. Connect the J 39700 universal pinout box using the J 39700-25 cable adapter to the EBCM/EBTCM harness connector only.
  5. Using the J 39200 DMM, measure the resistance between terminals D and B of the J 39700 .

Is the resistance equal to the specified value?

OL (infinite)

Go to Step  7

Go to Step  8

7

Replace the EBCM/EBTCM. Refer to Electronic Brake Control Module Replacement .

Is the replacement complete?

--

Go to Diagnostic System Check

--

8

Repair CKT 342 for a short to ground. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check

--

9
  1. Install a new 10A ABS fuse.
  2. Cycle the ignition switch from the OFF to RUN position, engine off.
  3. Recheck the fuse.

Is the fuse OK?

--

Go to Diagnostic System Check

Go to Step  10

10
  1. Turn the ignition switch to the OFF position.
  2. Remove the 10A ABS fuse.
  3. Disconnect the EBCM/EBTCM connector.
  4. Connect the J 39700 universal pinout box using the J 39700-25 cable adapter to the EBCM/EBTCM harness connector only.
  5. Using the J 39200 DMM, measure the resistance between terminals A and B of J 39700 .

Is the resistance equal to the specified value?

OL (infinite)

Go to Step  7

Go to Step  11

11

Repair CKT 441 for a short to ground. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check

--

12
  1. Install the fuses if removed.
  2. Turn the ignition switch to the RUN position, engine off.
  3. Using the J 39200 DMM, measure the voltage at the 10A ABS fuse by probing between the fuse test terminals and a good ground.

Is the voltage within the specified range?

Battery Voltage

Go to Step  13

Go to Wiring Repairs in Wiring Systems

13

Using the J 39200 DMM, measure the voltage at the 40A ABS SOL fuse by probing between the fuse test terminals and a good ground.

Is the voltage within the specified range?

Battery Voltage

Go to Step  14

Go to Wiring Repairs in Wiring Systems

14
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the EBCM/EBTCM connector.
  3. Connect the J 39700 universal pinout box using the J 39700-25 cable adapter to the EBCM/EBTCM harness connector only.
  4. Using the J 39200 DMM, measure the resistance between the J 39700 terminal B and a good ground.

Is the resistance less than specified value?

2 ohms

Go to Step  16

Go to Step  15

15

Repair CKT 1150 or G104 for an open or high resistance. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check

--

16
  1. Turn the ignition switch to the RUN position, engine off.
  2. Using the J 39200 DMM, measure the voltage between the J 39700 terminals A and B.

Is the voltage within the specified range?

Battery Voltage

Go to Step  18

Go to Step  17

17

Repair CKT 441 for an open. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check

--

18

Using the J 39200 DMM, measure the voltage between J 39700 terminals D and B.

Is the voltage within the specified range?

Battery Voltage

Go to Step  7

Go to Step  19

19

Repair CKT 342 for an open. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check

--