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5-176 Antilock Brake System
Brakes
OTC C0161 ABS/TCS Brake Switch Circuit Malfunction
Step
Action
Value(s)
Yes
No
Was the Diagnostic System Check performed?
Go to
A
1
-
Diagnostic
System
Go to Step2
Check-ABS
2
Observe the rear brake lamps.
-
Are the brake lamps off?
Go to Step 4
Go to Step 3
3
Disconnect the Stoplamp Switch connector C1.
-
Are the brake lamps on?
Go to Step 18
Go to Step 12
4
Press the brake pedal.
-
Do the brake lights come on?
Go to Step 5
Go to Step 8
1. Turn the ignition switch .to the OFF position.
2. Disconnect the EBCM connector C1.
3. Install the
J
39700 Universal Pinout Box using the
J
39700-530 cable adapter to the EBCM harness
5
connector only.
B+
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?
Go to Step 6
Go to Step 7
Replace the EBCM. Refer to Electronic Brake Control
Go to A
6
Module (EBCM) Replacement.
-
Diagnostic
-
Is the replacement complete?
System
Check-ABS
Repair the open or high resistance in CKT 20. Refer to
Go to A
7
Wiring Repairs.
-
Diagnostic
-
Is the circuit repair complete?
System
Check-ABS
(
8
Check the STOP/HAZARD fuse in the 1/P Fuse Block.
-
Is the fuse OK?
Go to Step 9
Go to Step 13
1. Disconnect the Stoplamp Switch connector C1.
9
2. Using the
J
39200 DMM, measure the voltage at the
B+
Stoplamp Switch harness connector terminal A.
Is the voltage within specifications?
Go to Step 11
Go to Step 10
Repair the open in CKT 140. Refer to Wiring Repairs.
G.o to A
10
Is the circuit repair complete?
-
Diagnostic
-
System
Check-ABS
Connect a fused jumper wire between the Stoplamp
11
Switch harness connector terminals A .and B.
-
Do the brake lamps come on?
Go to Step 12
Go to Step 7
Adjust or repair the Stoplamp Switch as necessary.
Go to A
12
Is the repair complete?
-
Diagnostic
System
-
Check-ABS
1. Replace the STOP/HAZARD fuse. (Do not press the
13
brake pedal;)
2. Check the STOP/HAZARD fuse.
-
Is the fuse OK?
Go to Step 15
Go to Step 14
(
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