Infiniti G37 Coupe. Manual - part 243

BR-10

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BRAKE PEDAL

6.

Press-fit the stop lamp switch (4) until the stop lamp switch hits the stopper rubber 45

°

 clockwise while

pulling the brake pedal pad slightly. (ASCD brake switch threaded end hits the stopper rubber.)

CAUTION:

• The clearance (C

2

) between the stopper rubber and the stop lamp switch threaded end must be

the specified value. Refer to 

BR-63, "Brake Pedal"

. 

• The stop lamp must turn off when the brake pedal is released.

BRAKE FLUID

BR-11

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BRAKE FLUID

Inspection

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BRAKE FLUID LEVEL

• Check that the fluid level in the reservoir tank is within the specified

range (MAX – MIN lines).

• Visually check for any brake fluid leakage around the reservoir

tank.

• Check the brake system for any leakage if the fluid level is

extremely low (lower than MIN).

• Check the brake system for fluid leakage if the warning lamp

remains illuminated even after the parking brake is released.

BRAKE LINE

1.

Check brake line (tubes and hoses) for cracks, deterioration or other damage. Replace any damaged
parts.

2.

Check for fluid leakage by fully depressing brake pedal while
engine is running.

CAUTION:

If leakage occurs around joints, retighten or, if necessary,
replace damaged parts.

Draining

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CAUTION:

• 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.

• Turn the ignition switch OFF and disconnect the ABS actuator and electric unit (control unit) con-

nector or the battery negative terminal before performing work.

• Cover crowfoot and flare nut wrench with a cloth as not to damage the caliper (front 4 piston type,

rear 2 piston type).

1.

Connect a vinyl tube to the bleed valve.

2.

Depress the brake pedal and loosen the bleeder valve to gradu-
ally discharge brake fluid.

Refilling

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CAUTION:

• Turn the ignition switch OFF and disconnect the ABS actuator and electric unit (control unit) con-

nector or the battery negative terminal before performing work.

JPFIA0007ZZ

SBR389C

BRA0007D

BR-12

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BRAKE FLUID

• Cover crowfoot and flare nut wrench with a cloth as not to damage the caliper (front 4 piston type,

rear 2 piston type).

1.

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

CAUTION:

Never reuse drained brake fluid.

2.

Loosen the bleeder valve, slowly depress the brake pedal to the
full stroke, and then release the pedal. Repeat this operation at
intervals of 2 or 3 seconds until all brake fluid is discharged.
Then close the bleeder valve with the brake pedal depressed.
Repeat the same work on each wheel.

3.

Perform the air bleeding. Refer to 

BR-12, "Bleeding Brake Sys-

tem"

.

Bleeding Brake System

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CAUTION:

• Turn the ignition switch OFF and disconnect the ABS actuator and electric unit (control unit) con-

nector or the battery negative terminal before performing the work.

• Monitor the fluid level in the reservoir tank while performing the air bleeding 
• Always use new brake fluid for refilling. Never reuse the drained brake fluid.
• Cover crowfoot and flare nut wrench with a cloth as not to damage the caliper (front 4 piston type,

rear 2 piston type).

1.

Connect a vinyl tube to the bleeder valve of the rear right brake.

2.

Fully depress the brake pedal 4 to 5 times.

3.

Loosen the bleeder valve and bleed air with the brake pedal depressed, and then quickly tighten the
bleeder valve.

4.

Repeat steps 2 and 3 until all of the air is out of the brake line.

5.

Tighten the bleeder valve to the specified torque. Refer to 

BR-43, "BRAKE CALIPER ASSEMBLY (1 PIS-

TON TYPE) : Exploded View"

 [front disc brake (1 piston type)], 

BR-47, "BRAKE CALIPER ASSEMBLY (4

PISTON TYPE) : Exploded View"

 [front disc brake (4 piston type), 

BR-56, "BRAKE CALIPER ASSEMBLY

(1 PISTON TYPE) : Exploded View"

 [rear disc brake (1 piston type)], 

BR-59, "BRAKE CALIPER ASSEM-

BLY (2 PISTON TYPE) : Exploded View"

 [rear disc brake (2 piston type)].

6.

Perform steps 1 to 5 for the rear right brake 

→

 front left brake 

→

 rear left brake 

→

 and front right brake in

order.

7.

Check that the fluid level in the reservoir tank is within the specified range after air bleeding. Refer to 

BR-

11, "Inspection"

.

8.

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

BR-7,

"Inspection and Adjustment"

.

PFIA0403J

BRAKE MASTER CYLINDER

BR-13

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BRAKE MASTER CYLINDER

Inspection

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FLUID LEAK

• Check for brake fluid leakage from the master cylinder mounting face, reservoir tank mounting face and

brake tube connections.