1991 Infiniti Q45 Brake Service (ONLINE REPAIR MANUALS)

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BRAKE SERVICE PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Infiniti Q45 cars and light trucks from 1990+.

INFINITI, ANTI-LOCK BRAKES -> DESCRIPTION
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS

The Anti-Lock Brake System (ABS) prevents the wheels from locking up when braking, regardless of the surface conditions. This allows the car to stop in a shorter distance, and allows the driver to maintain directional control of the vehicle during heavy braking.

During normal braking conditions, the ABS ...

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BRAKE SERVICE PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Infiniti Q45 cars and light trucks from 1990+.

INFINITI, POWER BRAKE UNITS -> OVERHAUL
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS

This unit cannot be overhau...

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BRAKE SERVICE PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Infiniti Q45 cars and light trucks from 1990+.

INFINITI, POWER BRAKE UNITS -> POWER BOOSTER REPLACEMENT
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS

  • Connect tube to bleeder valve.
  • Open bleeder valve, drain fluid by depressing brake pedal until master cylinder is empty.
  • Remove brake line flare nuts, then master cylinder attaching nuts.
  • Remove clevis pin, Figs. and .
  • Remove brake booster attaching nuts, then remove booster.
  • Reverse procedure to install noting ...

CLICK HERE TO GET FULL ACCESS TO 1991 Infiniti Q45 BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Infiniti Q45 cars and light trucks from 1990+.

INFINITI, ANTI-LOCK BRAKES -> SELF-DIAGNOSIS & TESTING -> DIAGNOSTIC TESTS -> G20 -> M30 -> Q45
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS

The warning lamp on the instrument panel will come on when a problem is detected in the ABS braking system. To obtain a self diagnosing result the vehicle must be driven for at least one minute at a minimum speed of 20 mph before self diagnosis is obtained. After vehicle is stopped, the number of LED flashes is counted with the engine running, Fig. .

The LED, which is located in the control unit identifies a problem by the number of flashes, Figs and The LED and warning lamp will stay activated, even after malfunct...

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BRAKE SERVICE PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Infiniti Q45 cars and light trucks from 1990+.

INFINITI, HYDRAULIC BRAKE SYSTEM -> MASTER CYLINDER REPLACEMENT -> ASSEMBLY -> DISASSEMBLY -> G20 -> INSPECTION -> M30 & Q45 -> MASTER CYLINDER OVERHAUL
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS

  • Connect tube to bleeder valve.
  • Open bleeder valve, drain fluid by depressing brake pedal until master cylinder is empty.
  • Remove brake line flare nuts, master cylinder attaching nuts, then master cylinder.
  • Reverse procedure to install noting the following:
    • Torque master cylinder attaching nuts to 5.8-8.0 ft. lbs.
    • Torque flare nuts to 11-13 ft.lbs.
    • Bleed air from system as outlined in "Bleeding System."

MASTER CYLINDER OVERHAUL

For exploded view of master cylinder, refer to Figs. through .

DISASSEMBLY

M30 & Q45
  • Lightly push valve into cylinder, then remove stopper, Fig....

CLICK HERE TO GET FULL ACCESS TO 1991 Infiniti Q45 BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1991 Infiniti Q45 AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Infiniti Q45 cars and light trucks from 1990+.

INFINITI, HYDRAULIC BRAKE SYSTEM -> BRAKE BLEEDING
Vehicle: 1991 Infiniti Q45 4.5 V8 GAS

Do not spill brake fluid on painted surfaces, it may cause damage to the paint. If brake fluid is spilled, wash immediately with water.

  • Place container under master cylinder to avoid spillage, then fill master cylinder with brake fluid.
  • Connect hose to bleeder valves, then depress brake pedal several times.
  • With pressure applied to pedal open bleeder valve to release air trapped in system.
  • Close bleeder, then release pedal slowly.
  • R...

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