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 BRAKE PUMP MOTOR WIRE HARNESS CONNECTION (MT+ / MT-)
1. Using a screwdriver, remove the 2 plugs from the hydraulic brake booster (See DISASSEMBLY ).
2. Check the tightening torque of 2 screws which fasten the wire harness connecting the hydraulic brake booster and brake booster pump (See REASSEMBLY ).
  Torque: 2.9 N*m (30 kgf*cm, 26 in.*lbf)
NG: RETIGHTEN SCREWS

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.
2. Measure the resistance between the red wire (MT+) and black wire (MT-).
  Standard resistance:
  
  Below 2 Ω
  
  Fig 1: Identifying Red Wire (MT+) & Black Wire (MT-)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE BRAKE BOOSTER PUMP ASSEMBLY (See DISASSEMBLY )

OK: Go to next step

RECONFIRM DTC

Reassemble the hydraulic brake booster, then reinstall the hydraulic brake booster.
Clear the DTC (See DTC CHECK/CLEAR ).

Check if the same DTC is detected (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 )