GMC chevrolet camaro 2000 Service Manual page 697

5-224 Antilock Brake System
Brakes
No Communication with EBCM
Step Action Value(s)
Yes No
DEFINITION: Scan tool can not communicate with the EBCM.
(
Was the Diagnostic System Check performed?.
GotoA
1
-
Diagnostic
System
Go to Step 2 Check-ABS
Turn the Ignition switch to the RUN position with the
Go to Scan Tool
engine off.
Does Not
2
Can the scan tool communicate with other modules on the
-
Communicate
Class 2 serial data line, such as the PCM?
w/Class 2
Go to Step 3 Data Line
Inspect the 1 OA ABS IGN fuse in the Underhood Electrical
3 Center 2.
-
Is the fuse OK?
.
Go to Step 4 Go to Step 6
1. Install the fuses if removed.
2. Turn the ignition switch to the RUN position,
engine off.
4
3. Using
J
39200 DMM, measure the voltage at the
Battery Volts
10A ABS IGN fuse by probing between the fuse test Go to Testing for
terminals and a good ground.
Short to Ground
Is the voltage within the range specified within the value(s)
in Wiring
column?·
Go to Step 5 Systems
1. Turn the ignition switch to the OFF position.
2. Disconnect the EBCM connector C1.
3. Connect the J 39700 Universal Pinout Box using the
5
J
39700-25 to the EBCM harness connector C1 only.
0-5Q
4. Using
J
39200 DMM, measure the resistance
between J 39700 terminal 15 and a good ground.
Is the resistance within the range specified in the value(s)
column? Go to Step 10 Go to Step 9
1. Install a new 10A ABS IGN fuse.
2. Cycle the ignition switch from the OFF to RUN
Go to A
(
6
position, engine off.
-
Diagnostic
3. Recheck the fuse.
System
Is the fuse OK? Check-ABS
Go to Step 7
1 . Turn the ignition switch to the OFF position.
2. Remove the 1 OA ABS IGN fuse.
3. Disconnect the EBCM connector C1.
4. Connect the J 39700 Universal Pinout Box using the
OL (infinite) 7
J
39700-25 to the EBCM harness connector C1 only.
5. Using J 39200 DMM, measure the resistance
between terminals 8 and 15 of J 39700.
Is the resistance within the range specified in the value(s)
Go to Step 12 Go to Step 8 column?
Repair CKT 739 for a short to ground. Refer to Wiring Goto A
8
Repairs.
-
Diagnostic
-
Is the repair complete?
System
Check-ABS
Repair CKT 651 or G101 for an open or high resistance. Go to A
9
Refer to Wiring Repairs.
-
Qiagnostic
-
Is the repair complete?
System
Check-ABS
1. Turn the ignition switch to the RUN position,
engine off.
I
10
2. Using J 39200 DMM, measure the voltage between
Battery Volts
J 39700 terminals 8 and 15.
Is the voltage within the range specified in the value(s)
Go to Step 12 Go to Step 11
column?
Repair CKT 739 for an open. Refer to Wiring Repairs. Goto A
11
Is the repair complete?
-
Diagnostic
-
System
Check-ABS
Replace the EBCM. Refer to Electronic Brake Control Go to A
12
Module (EBCM) Replacement.
-
Diagnostic
-
Is the replacement complete?
System
Check-ABS