Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

STOP LAMP SWITCH SYSTEM

Check the stop lamp switch system. Refer to DIAGNOSIS PROCEDURE .

Is the inspection result normal?

YES

GO TO STEP 2 .

NO

Repair or replace stop lamp switch system.

CHECK BRAKE FLUID LEAKAGE

Check the brake fluid leakage. Refer to INSPECTION .

Is the inspection result normal?

YES

GO TO STEP 3 .

NO

Repair or replace brake fluid leakage part.

CHECK BRAKE PIPING

Check the brake piping. Refer to INSPECTION .

Is the inspection result normal?

YES

GO TO STEP 4 .

NO

Repair or replace brake piping.
- Front: Refer to REMOVAL AND INSTALLATION .
- Rear: Refer to REMOVAL AND INSTALLATION .

CHECK BRAKE PEDAL

Check the brake pedal.
- Brake pedal height: Refer to INSPECTION .
- Brake pedal assembly: Refer to EXPLODED VIEW .
Is the inspection result normal?

YES

GO TO STEP 5 .

NO

Adjust the brake pedal height or replace brake pedal assembly.
- Adjust the brake pedal: Refer to ADJUSTMENT .
- Replace the brake pedal: Refer to REMOVAL AND INSTALLATION .

CHECK BRAKE MASTER CYLINDER

Check the brake master cylinder. Refer to INSPECTION .

Is the inspection result normal?

YES

GO TO STEP 6 .

NO

Repair or replace brake master cylinder. Refer to REMOVAL AND INSTALLATION .

CHECK BRAKE BOOSTER

Check the brake booster. Refer to INSPECTION .

Is the inspection result normal?

YES

GO TO STEP 7 .

NO

Repair or replace brake booster. Refer to REMOVAL AND INSTALLATION .

CHECK VACUUM PIPING

Check the vacuum piping. Refer to EXPLODED VIEW .

Is the inspection result normal?

YES

GO TO STEP 8 .

NO

Repair or replace vacuum piping. Refer to REMOVAL AND INSTALLATION .

CHECK FRONT DISC BRAKE

Check the front disc brake caliper. Refer to EXPLODED VIEW .

Is the inspection result normal?

YES

GO TO STEP 9 .

NO

Repair or replace front disc brake caliper. Refer to REMOVAL AND INSTALLATION .

CHECK REAR DISC BRAKE

Check the rear disc brake. Refer to EXPLODED VIEW .

Is the inspection result normal?

YES

GO TO STEP 10 .

NO

Repair or replace rear disc brake. Refer to REMOVAL AND INSTALLATION .

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND CIRCUIT

Check the ABS actuator and electric unit (control unit) power supply and ground circuits. Refer to DIAGNOSIS PROCEDURE .

Is the inspection result normal?

YES

GO TO STEP 11 .

NO

Repair / replace harness, connector, fuse, or fusible link.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

With CONSULT
1. Erase "Self Diagnostic Result" of "ABS".
2. Turn the ignition switch OFF.
  NOTE:
  Wait at least 10 seconds after turning ignition switch OFF.
3. Start the engine.
  NOTE:
  Wait at least 10 seconds after starting the engine.
4. Start the engine and drive the vehicle for a short period of time.
  NOTE:
  Vehicle must be driven after repair or replacement to erase the previous DTCs.
5. Stop the vehicle.
6. Perform "Self Diagnostic Result" of "ABS".
Is DTC "C1142" detected?

YES

Replace the ABS actuator and electric unit (control unit). Refer to REMOVAL AND INSTALLATION .

NO

Check the ABS actuator and electric unit (control unit) harness connector and terminal for damage, looseness and disconnection. Repair / replace harness, connector, or terminal.