Inspection Procedure

1. Is DTC output for ABS and VSC?

Result 

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 CORRECTLY 

OK: Go to next step 

1. Check the battery voltage.

   Voltage: 

   11 to 14 V 

NG: INSPECT CHARGING SYSTEM 

OK: Go to next step 

1. WHEN USING INTELLIGENT TESTER:
   1. Connect the intelligent tester to the DLC3.
   2. Start the engine.
   3. Select the DATA LIST mode on the intelligent tester.
      DATA LIST REFERENCE CHART
      
      

      Item	Measurement Item /Range (Display)	Normal Condition
      IG VOLTAGE	ECU power supply voltage / UNDER / NORMAL	NORMAL: 9.5 V or over UNDER: Below 9.5 V

   4. Check the voltage condition output from the ECU displayed on the intelligent tester.

      OK: 

      "Normal" is displayed. 

2. WHEN NOT USING INTELLIGENT TESTER:
   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.

Voltage 

Fig 1: Identifying Skid Control ECU Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: Go to step   6 

OK: Go to next step 

1. WHEN USING INTELLIGENT TESTER:
   1. Connect the intelligent tester to the DLC3 and start the engine.
   2. Select the item "VSC WARN LIGHT" in the ACTIVE TEST and operate the VSC warning light on the intelligent tester.
   3. Check that "ON" and "OFF" of the VSC warning light can be shown on the combination meter by the intelligent tester.
2. WHEN NOT USING INTELLIGENT TESTER:
   1. Turn the ignition switch off and disconnect the connector S1 from the skid control ECU.
   2. Turn the ignition switch to the ON position.
   3. Check that the VSC warning light goes off.
   Fig 2: Identifying Skid Control ECU Connector Terminals

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE ABS WARNING LIGHT CIRCUIT 

OK: REPLACE ABS AND TRACTION ACTUATOR 

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

   Resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   S1-32 (GND1) - Body ground	Below 1 Ω

   NOTE: When replacing ABS & TRACTION actuator assembly, perform zero point calibration (See CALIBRATION  ).

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ABS AND TRACTION ACTUATOR