Inspection Procedure

NOTE: When replacing the master cylinder solenoid, perform zero point calibration (See CALIBRATION ).

HINT:

Remove the hydraulic brake booster before the inspection (See REMOVAL ).

CHECK CONNECTION OF PUMP MOTOR WIRE HARNESS (MT+/MT-)
1. Using a screwdriver, remove the 2 plugs from the hydraulic brake booster assembly (See DISASSEMBLY ).
2. Check the tightening torque of the 2 screws which tighten the wire harness connecting the hydraulic brake booster assembly and the brake booster pump (See DISASSEMBLY ).
  OK: The harness is tightened to the specific torque.
  
  Torque: 2.9 N*m (30 kgf*cm, 26 in.*lbf)
NG: RETIGHTEN SCREWS UP

OK: Go to next step
CHECK RESISTANCE OF PUMP MOTOR WIRE HARNESS (MT+/MT-)
1. Using a screwdriver, remove the 2 screws and pull the wire harness from the hydraulic brake booster assembly (See DISASSEMBLY ).
2. Measure the resistance between the red wire (MT+) and the black wire (MT-)
  Standard resistance:
  
  2 Ω
NG: REPLACE BRAKE BOOSTER WITH ACCUMULATOR PUMP ASSEMBLY

Fig 1: Checking Resistance Of Pump Motor Wire Harness (MT+/MT-)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

RECONFIRM DTC

Reassemble the hydraulic brake booster assembly (See REASSEMBLY ).
Install the hydraulic brake booster assembly (See INSTALLATION ).
Clear the DTC (See DTC CHECK/CLEAR ).

Check if the same DTC is detected (See DTC CHECK/CLEAR ).

Result

RESULT CHART

Condition	Proceed to
DTC is output	A
DTC is not output	B

B: END

A: REPLACE MASTER CYLINDER SOLENOID