Inspection Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch off.
3. Depress the brake pedal more than 20 times.
4. Turn the ignition switch to ON.
5. Turn the tester on.
6. Select the following menu items: Chassis / ABS/VSC/ TRAC/ Data List

   DATA LIST: ABS/VSC/TRAC 

   ABS/VSC/TRAC DATA LIST REFERENCE
   
   

   Tester Display	Measurement Item / Range	Normal Condition	Diagnostic Note
   Accumulator Sensor	Accumulator pressure sensor reading / min.: 0 V, max.: 5 V	3.58 to 5 V	If value constant regardless of pump operation, accumulator pressure sensor malfunction suspected.

7. Confirm whether the accumulator output voltage is normal.

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   Output value normal	A
   Output value not normal	B

B: REPLACE HYDRAULIC BRAKE BOOSTER  (See REMOVAL )

A: Go to next step 

1. Turn the ignition switch off.
2. Depress the brake pedal more than 20 times.
3. Install a brake pedal effort gauge (SST), and bleed air.
4. Connect the Techstream to the DLC3.
5. Turn the ignition switch to ON.
6. Turn the tester on.
7. Select the following menu items: Chassis / ABS/VSC/ TRAC/ Data List

   DATA LIST: ABS/VSC/TRAC 

   ABS/VSC/TRAC DATA LIST REFERENCE
   
   

   Tester Display	Measurement Item / Range	Normal Condition	Diagnostic Note
   Master Cylinder Sensor 1	Master cylinder pressure sensor 1 reading / min.: 0 V, max.: 5 V	0.3 to 1.9 V With pedal pressure of 49 N (5 kgf, 11 lbf)	Front brake pressure: 770 to 1280 kpa (7.9 to 13.1 kgf/cm2 , 112 to 186 psi)

8. Check that the master cylinder output value is in the Normal Condition range.

   OK: 

   Master cylinder pressure sensor value is in the Normal Condition. 

NG: REPLACE HYDRAULIC BRAKE BOOSTER  (See REMOVAL )

OK: Go to next step 

1. Clear the DTC (See DTC CHECK/CLEAR  ).
2. Turn the ignition switch off.
3. Depress the brake pedal more than 20 times.
4. Turn the ignition switch to ON.
5. Wait until the pump motor stops.
6. Depress the brake pedal and release it.
7. Wait for 25 minutes.
8. Check if the same DTC is recorded (See DTC CHECK/CLEAR  ).

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   DTC output	A
   DTC not output	B

B: END 

A: REPLACE MASTER CYLINDER SOLENOID  (See DISASSEMBLY )