Inspection Procedure

1. Disconnect the connector (A5) from the brake master cylinder.
2. With ignition switch OFF, depress the brake pedal more than 40 times to decrease the accumulator pressure.

   HINT:

   When a pressure in power supply system is released, reaction force becomes lightly.

3. Measure resistance between terminals PL and PLG of brake master cylinder.

   OK: 

   Resistance: 5.1 - 6.3 kΩ 

   Fig 1: Inspecting Pressure Switch (PL)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   After inspection, connect the connector and clear the DTC (See PRE-CHECK  ).

NG : REPLACE BRAKE MASTER CYLINDER SUB-ASSY 

OK : GO TO NEXT STEP 

1. Disconnect the connector (A4) from the brake master cylinder.
2. With ignition switch OFF, depress the brake pedal more than 40 times to decrease the accumulator pressure.

   HINT:

   When a pressure in power supply system is released, reaction force becomes lightly.

3. Measure resistance between terminals PH and PHG of brake master cylinder connector.

   OK: 

   Resistance: 0.9 - 1.1 kΩ 

   Fig 2: Inspecting Pressure Switch (PH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   After inspection, connect the connector and clear the DTC (See PRE-CHECK  ).

NG : REPLACE BRAKE MASTER CYLINDER SUB-ASSY 

OK : GO TO NEXT STEP 

1. Check for open and short circuit in harness and connector between each terminals PL and PH of the brake master cylinder and the same one of the skid control ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : CHECK AND REPLACE SKID CONTROL ECU ASSY