Jeep Grand Cherokee WK. Manual — part 165
C122A-BRAKE BOOSTER PEDAL FORCE SWITCH CIRCUIT (CONTINUED)
8.
CHECK THE (B135) BRAKE PEDAL FORCE SWITCH OPEN CIRCUIT FOR A SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the Anti-Lock Brake Module harness connector.
Disconnect the Brake Travel Sensor harness connector.
Turn the ignition on.
Measure the voltage of the (B135) Brake Pedal Force Switch Open
circuit.
Is there any voltage present?
Yes
>> Repair the (B135) Brake Pedal Force Switch Open circuit
for a short to voltage.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 9
9.
CHECK THE (B135) BRAKE PEDAL FORCE SWITCH OPEN CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Measure the resistance between ground and the (B135) Brake Pedal
Force Switch Open circuit.
Is the resistance below 5.0 ohms?
Yes
>> Repair the (B135) Brake Pedal Force Switch Open circuit
for a short to ground.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 10
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BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
WK
C122A-BRAKE BOOSTER PEDAL FORCE SWITCH CIRCUIT (CONTINUED)
10.
CHECK THE (B135) BRAKE PEDAL FORCE SWITCH OPEN CIRCUIT FOR AN OPEN
Measure the resistance of the (B135) Brake Pedal Force Switch Open
circuit.
Is the resistance below 5.0 ohms?
Yes
>> Replace the Anti-Lock Brake Module in accordance with
the Service Information.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Repair the (B135) Brake Pedal Force Switch Open circuit
for an open.
Perform ABS VERIFICATION TEST - VER 1.
11.
CHECK THE VOLTAGE ON THE (B136) BRAKE PEDAL FORCE SWITCH SIGNAL CIRCUIT
Measure the voltage of the (B136) Brake Pedal Force Switch Signal
circuit by back probing at the Brake Travel Sensor harness connector.
Is the voltage approximately 6 volts?
Yes
>> Go To 15
No
>> Go To 12
WK
BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
5 - 287
C122A-BRAKE BOOSTER PEDAL FORCE SWITCH CIRCUIT (CONTINUED)
12.
CHECK THE (B136) BRAKE PEDAL FORCE SWITCH SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the Anti-Lock Brake Module harness connector.
Disconnect the Brake Travel Sensor harness connector.
Turn the ignition on.
Measure the voltage of the (B136) Brake Pedal Force Switch Signal
circuit.
Is there any voltage present?
Yes
>> Repair the (B136) Brake Pedal Force Switch Signal circuit
for a short to voltage.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 13
13.
CHECK THE (B136) BRAKE PEDAL FORCE SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Measure the resistance between ground and the (B136) Brake Pedal
Force Switch Signal circuit.
Is the resistance below 5.0 ohms?
Yes
>> Repair the (B136) Brake Pedal Force Switch Signal circuit
for a short to ground.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 14
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BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
WK
C122A-BRAKE BOOSTER PEDAL FORCE SWITCH CIRCUIT (CONTINUED)
14.
CHECK THE (B136) BRAKE PEDAL FORCE SWITCH SIGNAL CIRCUIT FOR AN OPEN
Measure the resistance of the (B136) Brake Pedal Force Switch Signal
circuit.
Is the resistance below 5.0 ohms?
Yes
>> Replace the Anti-Lock Brake Module in accordance with
the Service Information.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Repair the (B136) Brake Pedal Force Switch Signal circuit
for an open.
Perform ABS VERIFICATION TEST - VER 1
.
15.
CHECK THE VOLTAGE ON THE (B134) BRAKE PEDAL FORCE SWITCH CLOSE CIRCUIT
Turn the ignition on.
Measure the voltage of the (B134) Brake Pedal Force Switch Close
circuit by back probing at the Brake Travel Sensor harness connector.
Depress and hold the brake pedal.
Is the voltage approximately 12 volts?
Yes
>> Go To 16
No
>> Replace the Brake Travel Sensor in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
WK
BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
5 - 289
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