Inspection Procedure

1. Is DTC output for ABS?

   Result 

   RESULT CHART
   
   

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

B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

A: Go to Next Step 

1. Check the ECU connector's connecting condition.

   OK: The connector should be securely connected. 

NG: CONNECT CONNECTOR TO ECU CORRECTLY 

OK: Go to Next Step 

1. Check the battery voltage.

   Standard voltage: 11 to 14 V 

NG: CHECK OR REPLACE CHARGING SYSTEM OR BATTERY 

OK: Go to Next Step 

1. Disconnect the skid control ECU connector.
2. Turn the ignition switch to the ON position.
3. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   S3-46 (IG1) - S3-32 (GND1)	10 to 14 V
   S3-46 (IG1) - S3-1 (GND2)	10 to 14 V

Fig 1: Identifying Skid Control ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG:  Go to step  6

OK: Go to Next Step 

1. WHEN USING TECHSTREAM:
   1. Connect Techstream to the DLC3 and start the engine.
   2. Select the item "ABS Warning Lamp" in the Active Test and operate the ABS warning light on Techstream.
   3. Check that "ON" and "OFF" of the ABS warning light can be shown on the combination meter by Techstream.
2. WHEN NOT USING TECHSTREAM:
   1. Turn the ignition switch off and disconnect the connector from the skid control ECU.
   2. Ground the terminal WA of the skid control ECU.
   3. Turn the ignition switch to the ON position.
   4. Check that the ABS warning light goes off.
Fig 2: Identifying Skid Control ECU Connector S3 Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPAIR OR REPLACE ABS WARNING LIGHT CIRCUIT 

NG: REPLACE BRAKE ACTUATOR ASSEMBLY 

1. Disconnect the skid control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   S3-1 (GND2) - Body ground	Below 1 Ω
   S3-32 (GND1) - Body ground	Below 1 Ω

   NOTE: When replacing brake actuator assembly, perform zero point calibration (See CALIBRATION  ).
Fig 3: Identifying Skid Control ECU Connector S3 Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE BRAKE ACTUATOR ASSEMBLY