Infiniti QX56 (Z62). Manual - part 120

BR-12

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BRAKE FLUID

warning lamp, ABS warning lamp, and brake warning lamp turn OFF. After these steps, erase self-
diagnosis results for “ABS” with CONSULT-III. 

- DTC other than “C118E” is detected: Refer to 

BRC-51, "DTC Index"

.

NOTE:
When the ignition switch is ON, the brake warning lamp may turns ON even when the parking brake pedal is
released with the brake fluid within the specified level. This indicates the decrease in accumulator fluid pres-
sure.

MOTOR/ACCUMULATOR ASSEMBLY

CAUTION:

• If the brake fluid adheres to the brake caliper assembly and disc rotor, quickly wipe it off.
• Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it

off immediately and wash with water if it gets on a painted surface.

• Never operate the brake pedal with the reservoir cap removed. Failure to do this may cause the scat-

tering of brake fluid.

•  Never operate the brake pedal excessively during the work procedure.
• Monitor the fluid level in the reservoir tank while performing the air bleeding.
• Bleed air in the following order: motor/accumulator assembly 

→

 front right brake 

→

 front left brake

→

 rear left brake 

→

 and rear right brake.

1.

Turn the ignition switch OFF.

2.

Depress the brake pedal 20 times or more.

3.

Check that there is no foreign material in the reservoir tank, and refill with new brake fluid.

CAUTION:

• Never reuse drained brake fluid.
• Never allow oils other than brake fluid to enter the reservoir tank.

4.

Turn the ignition switch ON.
NOTE:
The motor is activated and automatically stops.

5.

Turn the ignition switch OFF.

6.

Depress the brake pedal 20 times or more.
NOTE:
The pressure loss in the accumulator results in a large brake pedal stroke. In addition to this, the brake
pedal depression becomes lighter in initial stage.

7.

Repeat steps 4 to 6 for 5 times.

8.

Turn the ignition switch ON to check that the time between motor activation and automatic stop is less
than 18 seconds. If the time is 18 seconds or more, repeat from Step 4 to 8.

FRONT BRAKE

CAUTION:

• If the brake fluid adheres to the brake caliper assembly and disc rotor, quickly wipe it off.
• Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it

off immediately and wash with water if it gets on a painted surface.

• Never operate the brake pedal with the reservoir cap removed. Failure to do this may cause the scat-

tering of brake fluid.

• Never operate the brake pedal excessively during the work procedure.
• Monitor the fluid level in the reservoir tank while performing the air bleeding.
• Bleed air in the following order: motor/accumulator assembly 

→

 front right brake 

→

 front left brake

→

 rear left brake 

→

 and rear right brake.

1.

Turn the ignition switch OFF.

2.

Depress the brake pedal 20 times or more.
NOTE:
The pressure loss in the accumulator results in a large brake pedal stroke. In addition to this, the brake
pedal depression becomes lighter in initial stage.

3.

Check that there is no foreign material in the reservoir tank, and refill with new brake fluid.

CAUTION:

• Never reuse drained brake fluid.
• Never allow oils other than brake fluid to enter the reservoir tank.

4.

Turn the ignition switch ON.

BRAKE FLUID

BR-13

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5.

Connect a vinyl tube to the bleed valve.

6.

Depress the brake pedal and loosen the bleeder valve.

7.

Repeat steps 1 to 6 until all of the air is out of the brake line and tighten the air bleeder to the specified
torque with the brake pedal depressed. Refer to 

BR-36, "BRAKE CALIPER ASSEMBLY : Exploded View"

.

8.

Check that no drag feel is present for the front disc brake. Refer to 

BR-39, "BRAKE CALIPER ASSEMBLY

: Inspection"

.

9.

Check each item of brake pedal. Adjust it if the measurement value is not the standard. Refer to 

BR-7,

"Inspection and Adjustment"

.

REAR BRAKE

CAUTION:

• If the brake fluid adheres to the brake caliper assembly and disc rotor, quickly wipe it off.
• Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it

off immediately and wash with water if it gets on a painted surface.

• Never operate the brake pedal with the reservoir cap removed. Failure to do this may cause the scat-

tering of brake fluid.

• Never operate the brake pedal excessively during the work procedure.
• Monitor the fluid level in the reservoir tank while performing the air bleeding.
• Bleed air in the following order: motor/accumulator assembly 

→

 front right brake 

→

 front left brake

→

 rear left brake 

→

 and rear right brake.

1.

Turn the ignition switch OFF.

2.

Depress the brake pedal 20 times or more.
NOTE:
The pressure loss in the accumulator results in a large brake pedal stroke. In addition to this, the brake
pedal depression becomes lighter in initial stage.

3.

Check that there is no foreign material in the reservoir tank, and refill with new brake fluid.

CAUTION:

• Never reuse drained brake fluid.
• Never allow oils other than brake fluid to enter the reservoir tank.

4.

Turn the ignition switch ON.

5.

Connect a vinyl tube to the bleed valve.

6.

Depress the brake pedal and loosen the bleeder valve.

7.

Depress and hold the brake pedal depression to discharge 100 cc of brake fluid before tightening the air
bleeder to the specified torque. Refer to 

BR-42, "BRAKE CALIPER ASSEMBLY : Exploded View"

.

NOTE:
Since brake fluid is conveyed by the motor, the brake pedal is not necessarily depressed.

8.

Release the brake pedal.

9.

Repeat steps 1 to 8 until all of the air is out of the brake line and tighten the air bleeder to the specified
torque with the brake pedal depressed. Refer to 

BR-42, "BRAKE CALIPER ASSEMBLY : Exploded View"

.

10. Check that no drag feel is present for the rear disc brake. Refer to 

BR-45, "BRAKE CALIPER ASSEMBLY

: Inspection"

.

11. Check each item of brake pedal. Adjust it if the measurement value is not the standard. Refer to 

BR-7,

"Inspection and Adjustment"

.

BRAKE FLUID LEVEL ADJUSTMENT AFTER AIR BLEEDING

1.

Turn the ignition switch OFF.

2.

Depress the brake pedal 20 times or more.
NOTE:
The pressure loss in the accumulator results in a large brake pedal stroke. In addition to this, the brake
pedal depression becomes lighter in initial stage.

BR-14

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BRAKE FLUID

3.

Adjust brake fluid level to the reservoir tank MAX line.

CAUTION:

Never adjust with the ignition switch ON.

4.

Turn the ignition switch ON.

5.

Check that the reservoir tank brake fluid level is 4 

−

 12 mm (0.16

−

 0.47 in) lower than the MAX line.

NOTE:
Since brake fluid is in the accumulator in pressurized condition,
the reservoir tank brake fluid level should be lower than the MAX
line.

JPFIA0769ZZ

HYDRAULIC BOOSTER ASSEMBLY

BR-15

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HYDRAULIC BOOSTER ASSEMBLY

Inspection

INFOID:0000000006222467

OPERATION CHECK

1.

Turn the ignition switch OFF.

2.

Depress the brake pedal 20 times or more.
NOTE:
The pressure loss in the accumulator results in a large brake pedal stroke. In addition to this, the brake
pedal depression becomes lighter in initial stage.

3.

Check that the fluid level in the reservoir tank is MAX line.

4.

Position the selector lever in P range to release the parking brake.

5.

Turn the ignition switch ON to check the time between motor activation and motor stop.

6.

After the motor is stopped, check that the ABS warning lamp and the VDC warning lamp in the combina-
tion meter are OFF when the engine is started.

7.

Stop the engine (ignition switch OFF).

8.

Turn the ignition switch ON and depress the brake pedal 4 to 5 times to check the time between motor
activation and motor stop.

9.

Turn the ignition switch OFF. Turn the ignition switch ON again. Check that the VDC warning lamp turns
ON when the brake pedal is depressed 15 to 20 times.

10. Check that the VDC warning lamp turns ON when the brake pedal is depressed 15 to 20 times after the

lapse of 120 seconds or more after the ignition switch is turned ON again.

11. Perform the self-diagnosis for “ABS” with CONSULT-III and erase self-diagnosis results.

FUNCTION CHECK

1.

Turn the ignition switch OFF.

2.

Depress the brake pedal 20 times or more.
NOTE:
The pressure loss in the accumulator results in a large brake pedal stroke. In addition to this, the brake
pedal depression becomes lighter in initial stage.

3.

Turn the ignition switch ON with the brake pedal depressed to check that the clearance between the brake
pedal and the dash lower panel decreases.

Motor operating time

: 18 seconds or less

Motor operating time

: 2 

−

 11 seconds