DTC P05FF-62: Brake Pressure Sensor / Brake Pedal Position Sensor Signal Compare Failure [11/2023 - ]: Procedure

1. Interview the customer to check the vehicle conditions when the brake system warning light (red indicator) and brake system warning light (yellow indicator) illuminated.
2. Using the GTS, check for Freeze Frame Data that is recorded when a DTC is stored.

   Refer to FREEZE FRAME DATA [11/2023 - ]

   Chassis > Brake Booster > Trouble Codes 

   HINT: 

   • Freeze Frame Data is only stored once when a DTC is stored.
   • If other DTCs are output, repair any malfunctions related to those DTCs first, and then reproduce the conditions that caused DTC P05FF-62 to be stored based on the interview with the customer.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. With the brake pedal released, confirm the brake pedal stroke sensor assembly output voltage.

   Chassis > Brake Booster > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Stroke Sensor	Brake pedal stroke sensor 1	Min.: 0.0 V Max.: 5.0 V	Brake pedal released: 0.6 to 1.4 V	Reading increases when brake pedal is depressed

   Chassis > Brake Booster > Data List 

   Tester Display
   Stroke Sensor

   OK

   0.6 to 1.4 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

INSPECT/ADJUST INSTALLATION CONDITION OF BRAKE PEDAL STROKE SENSOR ASSEMBLY. Refer to  INSTALLATION [11/2023 - ] 

Result: 

OK 

See step  3

1. Turn the ignition switch off.
2. Mount a pedal effort gauge.
3. Turn the ignition switch to ON (READY) and depress the brake pedal once.

   HINT: 

   Depress the brake pedal after turning the ignition switch to ON (READY) to set the vehicle to linear mode (switching solenoid (SSA) on).

4. Depress the brake pedal slowly and check the brake pedal stroke sensor assembly output voltages with respect to brake pedal depression force.

   Chassis > Brake Booster > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Stroke Sensor	Brake pedal stroke sensor 1	Min.: 0.0 V Max.: 5.0 V	Brake pedal released: 0.6 to 1.4 V	Reading increases when brake pedal is depressed

   Chassis > Brake Booster > Data List 

   Tester Display
   Stroke Sensor

   HINT: 

   Perform this procedure in linear mode (switching solenoid (SSA) on).

   Standard Voltage

   Brake Effort [N (kgf, lbf)]	Stroke Sensor [V]
   50 (5, 11.2)	1.20 to 1.90
   100 (10, 22.5)	1.42 to 2.16
   150 (15, 33.7)	1.61 to 2.31

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE BRAKE PEDAL STROKE SENSOR ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

Result: 

OK 

See step  4

1. Depress the brake pedal slowly and check the reaction force pressure sensor output values with respect to brake pedal depression force.

   Chassis > Brake Booster > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Reaction Force Pressure	Pressure value of stroke simulator	Min.: 0.00 MPa Max.: 24.48 MPa	Brake pedal released: 0.00 to 1.53 MPa	Brake pedal is being depressed: Changes in proportion to the depression force of the brake pedal

   Chassis > Brake Booster > Data List 

   Tester Display
   Reaction Force Pressure

   HINT: 

   Perform this procedure in linear mode (switching solenoid (SSA) on).

   Standard Pressure

   Brake Effort [N (kgf, lbf)]	Reaction Force Pressure [MPa]
   50 (5, 11.2)	0.00 to 0.68
   100 (10, 22.5)	0.61 to 1.41
   150 (15, 33.7)	1.29 to 2.09
   200 (20, 45.0)	1.96 to 2.76

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CHECK AND REPAIR BRAKE FLUID LEAKS 

Result: 

OK 

See step  5

1. Clear the DTCs.

   Chassis > Brake Booster > Clear DTCs 

2. Turn the ignition switch off.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.
2. Check if the same DTC is output.

   Chassis > Brake Booster > Trouble Codes 

   Result

   Result	Proceed to
   DTC P05FF-62 is not output.	A
   DTC P05FF-62 is output.	B

Result: 

A 

END 

Result: 

B 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [11/2023 - ]