Otc C0161 Abs/Tcs Brake Switch Circuit Malfunction - GMC chervolet camaro 1999 Service Manual

Brakes
Antilock Brake System 5-189
OTC C0161 ABS!TCS Brake Switch Circuit Malfunction
Step Action
Value(s) Yes
No
Go to ABS
1 Was the Diagnostic System Check performed?
-
Go to Step2
Diagnostic
System Check
2
Observe the rear brake lamps.
-
Go to Step 4
Go to Step 3
Are the brake lamps off?
3
Disconnect the Stoplamp Switch connector C1.
-
Go to Step 18
Go to Step 12
Are the brake lamps on?
4
Press the brake pedal.
-
Go to Steps
Go to StepB
Do the brake lights come on?
1. Turn the ignition switch to the OFF position.
2. Disconnect the EBCM/EBTCM connector C1.
3. Install the
J
39700 Universal Pinout Box using the
5
J
39700 - 530 cable adapter to the EBCM/EBTCM
harness connector only.
Battery voltage Go to Step6
Go to Step 7
4. Using the J 39200 DMM, measure the voltage at the
J
39700 terminal 6 while an assistant presses the
brake pedal.
Is the voltage within specifications?
Replace the EBCM/EBTCM. Refer to Electronic Brake
Goto ABS
6
Control Module (EBCM) Replacement.
-
Diagnostic
-
Is the replacement complete?
System Check
Repair the open or high resistance in CKT 20. Refer to
Go to ABS
7
Repair Procedures Cell 5 in Electrical Diagnosis.
-
Diagnostic
-
Is the circuit repair complete?
System Check
8
Check the STOP/HAZARD fuse in the 1/P Fuse Block.
Go to Step9 Go to Step 13
-
Is the fuse OK?
1. Disconnect the Stoplamp Switch connector C1.
9
2. Using the
J
39200 DMM, measure the voltage at the
Battery voltage
Go to Step 11
Go to Step 10
Stoplamp Switch harness connector terminal A.
Is the voltage within specifications?
Repair the open in CKT 140. Refer to Repair Procedures
Go to ABS
10
Cell 5 in Electrical Diagnosis.
-
Diagnostic
-
Is the circuit repair complete?
System Check
Connect a fused jumper wire between the Stoplamp
11
Switch harness connector terminals A and B.
-
Go to Step 12 Go to Step 7
Do the brake lamps come on?
Adjust or repair the Stoplamp Switch as necessary.
Go to ABS
12
-
Diagnostic
-
Is the repair complete?
System Check
1. Replace the STOP/HAZARD fuse. (Do not press the
13
brake pedal.)
-
Go to Step 15 Go to Step 14
2. Check the STOP/HAZARD fuse.
Is the fuse OK?