Inspection Procedure

Measure voltage between terminals +BS and GND1 of brake actuator connector.
PREPARATION:

Disconnect the brake actuator connector.

CHECK:

Measure the voltage between terminals +BS and GND1 of the brake actuator harness side connector.

OK:

Voltage: 10 to 14 V

Fig 1: Identifying Brake Actuator Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Go to step 2.
2. OK: If same code is still output after DTC is deleted, check contact condition of each connection. If connections are normal, ECU may be defective.
Check ABS2 fuse.
PREPARATION:

Remove the ABS2 fuse from the engine room J/B.

CHECK:

Measure the resistance.

OK:

Resistance: Below 1 Ω
1. NG: Replace ABS2 fuse.
2. OK: Go To Next Step.
Measure resistance between terminal GND1 of skid control ECU connector and body ground.
PREPARATION:

Disconnect the brake actuator connector.

CHECK:

Measure the resistance between terminal GND1 of the skid control ECU harness side connector and body ground.

OK:

Resistance: Below 1 Ω

Fig 2: Identifying Skid Control ECU Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: Replace brake actuator assembly.
  NOTE: When replacing the brake actuator assembly, perform the zero point calibration (see PRE-CHECK ).
2. NG: Repair or replace harness and connector.