GMC chervolet camaro 1999 Service Manual page 713

5-238 Antilock Brake System Brakes
No Communication with EBCM/EBTCM (cont'd)
Step
Action Value(s)
Yes No
1. Install the fuses if removed.
2. Tum the ignition switch to the RUN position,
engine off.
Go to Power
4
3. Using J 39200 DMM, measure the voltage at the
Battery Volts , Go to Step 5 Distribution in
1 QA ABS IGN fuse by probing between the fuse test
Wiring Systems
terminals and a good ground.
Is the voltage within the range specified within the value(s)
column?
1. Tum the ignition switch to the OFF position.
2. Disconnect the EBCM/EBTCM connector C1.
3. Connect the J 39700 Universal Pinout Box using
the J 39700 - 25 to the EBCM/EBTCM harness
5
connector C1 only.
0 - 5.Q Go to Step 10 Go to Step 9
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?
1. Install a new 1 OA ABS IGN fuse.
2. Cycle the ignition switch from the OFF to RUN
Go to ABS
6
position, engine off.
-
Diagnostic Go to Step 7
3. Recheck the fuse.
System Check
Is the fuse OK?
1. Turn the ignition switch to the OFF position.
2. Remove the 1 OA ABS IGN fuse.
3. Disconnect the EBCM/EBTCM connector C1.
4. Connect the J 39700 Universal Pinout Box using
7
the J 39700 - 25 to the EBCM/EBTCM harness
OL (infinite)
Go to Step 12 Go to Step 8
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)
column?
Repair CKT 739 for a short to ground. Refer to Wiring
Goto ABS
8
Repairs.
-
Diagnostic
-
Is the repair complete?
System Check
Repair CKT 651 or G101 for an open or high resistance.
Goto ABS
9
Refer to Wiring Repairs.
-
Diagnostic
-
Is the repair complete?
System Check
1. Turn the ignition switch to the RUN position,
engine off.
10
2. Using J 39200 DMM, measure the voltage between
Battery Volts 12 Go to Step 11
J 39700 terminals 8 and 15.
Is the voltage within the range specified in the value(s)
column?
Repair CKT 739 for an open. Refer to Wiring Repairs.
Goto ABS
11
-
Diagnostic
-
Is the repair complete?
System Check
Replace the EBCM/EBTCM. Refer to Electronic Brake
Goto ABS
12
Control Module (EBCM) Replacement.
-
Diagnostic
-
Is the replacement complete?
System Check