Jeep Grand Cherokee WK. Manual — part 167

C122B-BRAKE BOOSTER PEDAL FORCE SWITCH CIRCUIT PERFORMANCE (CONTINUED)

6.

CHECK THE (B134) BRAKE PEDAL FORCE SWITCH CLOSE CIRCUIT FOR AN OPEN

Measure the resistance of the (B134) Brake Pedal Force Switch Close
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 (B134) Brake Pedal Force Switch Close circuit

for an open.

Perform ABS VERIFICATION TEST - VER 1.

7.

CHECK THE VOLTAGE ON THE (B135) BRAKE PEDAL FORCE SWITCH OPEN CIRCUIT

Measure the voltage of the (B135) Brake Pedal Force Switch Open
circuit by back probing at the Brake Travel Sensor harness connector.

Is the voltage approximately 12 volts?

Yes

>> Go To 11

No

>> Go To 8

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BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS

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C122B-BRAKE BOOSTER PEDAL FORCE SWITCH CIRCUIT PERFORMANCE (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

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C122B-BRAKE BOOSTER PEDAL FORCE SWITCH CIRCUIT PERFORMANCE (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

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C122B-BRAKE BOOSTER PEDAL FORCE SWITCH CIRCUIT PERFORMANCE (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

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