No Communication with Electronic Brake Control Module/Electronic Brake and Traction Control Module. Chevrolet Corvette 1999

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1999 🢒 Corvette 🢒 Body and Accessories 🢒 Wiring Systems 🢒 No Communication with Electronic Brake Control Module/Electronic Brake and Traction Control Module

Cell 44: Power and Ground
ABS Components
Antilock Brake System Schematic Icons

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 EBTCM

Step	Action	Value(s)	Yes	No
DEFINITION: Scan tool can not communicate with the EBTCM.
1	Was the Diagnostic System Check performed?	--	Go to Step 2	Go to Diagnostic System Check - ABS
2	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 Data Link Connector (DLC) System Check in Wiring Systems
3	Inspect the 10A ABSTRNS fuse in the Underhood Electrical Center. Is the fuse OK?	--	Go to Step 4	Go to Step 9
4	Inspect the 20A ABS ELEC fuse in the Underhood Electrical Center. Is the fuse OK?	--	Go to Step 12	Go to Step 5
5	Install a new ABS ELEC fuse. Recheck the fuse. Is the fuse OK?	--	Go to Diagnostic System Check - ABS	Go to Step 6
6	Turn the ignition switch to the OFF position. Remove the ABS ELEC fuse. Disconnect the EBTCM connector. Connect the J 39700 Universal Pinout Box using the J 39700-25 cable adapter to the EBTCM harness connector only. Using J 39200 DMM, measure the resistance between terminals D and B of J 39700 . Is the resistance within the range specified in the value(s) column?	OL (infinite)	Go to Step 7	Go to Step 8
7	Replace the EBTCM. Refer to Electronic Brake Control Module Replacement . Is the replacement complete?	--	Go to Diagnostic System Check - ABS	--
8	Repair CKT 1242 for a short to ground. Refer to Wiring Repairs in Wiring Systems. Is the repair complete?	--	Go to Diagnostic System Check - ABS	--
9	Install a new 10A ABSTRNS fuse. Cycle the ignition switch from the OFF to ON position, engine off. Recheck the fuse. Is the fuse OK?	--	Go to Diagnostic System Check - ABS	Go to Step 10
10	Turn the ignition switch to the OFF position. Remove the 10A ABSTRNS fuse. Disconnect the EBTCM connector. Connect the J 39700 Universal Pinout Box using the J 39700-25 cable adapter to the EBTCM harness connector only. Using J 39200 DMM, measure the resistance between terminals A and B of J 39700 . Is the resistance within the range specified in the value(s) column?	OL (infinite)	Go to Step 7	Go to Step 11
11	Repair CKT 641 for a short to ground. Refer to Wiring Repairs in Wiring Systems. Is the repair complete?	--	Go to Diagnostic System Check - ABS	--
12	Install the fuses if removed. Turn the ignition switch to the ON position, engine off. Using J 39200 DMM, measure the voltage at the 10A ABSTRNS fuse by probing between the fuse test terminals and a good ground. Is the voltage within the range specified within the value(s) column?	Battery Volts	Go to Step 13	Go to Power Distribution in Wiring Systems
13	Using J 39200 DMM, measure the voltage at the 20A ABS ELEC fuse by probing between the fuse test terminals and a good ground. Is the voltage within the range specified within the value(s) column?	Battery Volts	Go to Step 14	Go toPower Distribution in Wiring Systems
14	Turn the ignition switch to the OFF position. Disconnect the EBTCM connector. Connect the J 39700 Universal Pinout Box using the J 39700-25 cable adapter to the EBTCM harness connector only. Using J 39200 DMM, measure the resistance between J 39700 terminal B and a good ground. Is the resistance within the range specified in the value(s) column?	0-5 ohms	Go to Step 16	Go to Step 15
15	Repair CKT 1251 or ground G101 for an open or high resistance. Refer to Wiring Repairs in Wiring Systems. Is the repair complete?	--	Go to Diagnostic System Check - ABS	--
16	Turn the ignition switch to the ON position, engine off. Using J 39200 DMM, measure the voltage between J 39700 terminals A and B. Is the voltage within the range specified in the value(s) column?	Battery Volts	Go to Step 18	Go to Step 17
17	Repair CKT 641 for an open. Refer to Wiring Repairs in Wiring Systems. Is the repair complete?	--	Go to Diagnostic System Check - ABS	--
18	Using J 39200 DMM, measure the voltage between J 39700 terminals D and B. Is the voltage within the range specified in the value(s) column?	Battery Volts	Go to Step 20	Go to Step 19
19	Repair CKT 1242 for an open. Refer to Wiring Repairs in Wiring Systems. Is the repair complete?	--	Go to Diagnostic System Check - ABS	--
20	Turn the ignition switch to the OFF position. Remove the bus bar from the Star Connector 1. Using J 39200 DMM, measure the resistance between the Star Connector 1 terminal E and terminal 10 of J 39700 . Refer to Electrical Schematic - Cell 44 for Class 2 serial data line schematic. Is the resistance within the range specified within the values column?	0-5 ohms	Go to Step 7	Go to Step 21
21	Repair CKT 1122 for an open or high resistance. Refer to Wiring Repairs in Wiring Systems. Is the repair complete?	--	Go to Diagnostic System Check - ABS	--