Inspection Procedure

1. CHECK DTC (See  PRE-CHECK  ) 
   DTC REFERENCE TABLE
   
   

   A	Normal Code
   B	Malfunction Code

   B: REPAIR CIRCUIT INDICATED BY OUTPUT DTC 

   A: Go to next step 

2. INSPECT CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED 

   NO: CONNECT CONNECTOR TO ECU 

   YES: Go to the next step 

3. INSPECT SKID CONTROL ECU CONNECTOR (IG1 TERMINAL VOLTAGE) 

   WHEN USING HAND-HELD TESTER 

   1. Connect the hand-held tester to the DLC3.
   2. Start the engine.
   3. Select the DATA LIST mode on the hand-held tester.
      SKID CONTROL ECU - VOLTAGE TABLE
      
      

      Item	Measurement Item / Range (Display)	Normal Condition
      IG VOLTAGE	ECU power supply voltage / NORMAL or TOO LOW	NORMAL: 9.8 V or over TOO LOW: Below 9.8 V

   4. Read the voltage condition output from the ECU displayed on the hand-held tester.

   Standard: 

   "Normal" is displayed. 

   WHEN NOT USING HAND-HELD 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.
   Fig 1: Identifying Skid Control ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard: 

   SKID CONTROL ECU - VOLTAGE TABLE
   
   

   Tester Connection	Specified Condition
   S1-18 (IG1) - S1-4 (GND1)	11 to 14 V
   S1-18 (IG1) - S1-1 (GND2)	11 to 14 V

   OK: Go to step   5 

   NG: Go to next step 

4. INSPECT SKID CONTROL ECU CONNECTOR (GND TERMINAL CONTINUITY) 
   1. Disconnect the skid control ECU connector.
   2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying Skid Control ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard: 

   SKID CONTROL ECU - RESISTANCE TABLE
   
   

   Tester Connection	Specified Condition
   S1-4 (GND1) - Body ground	Below 1Ω
   S1-1 (GND2) - Body ground	Below 1Ω

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

5. INSPECT COMBINATION METER ASSEMBLY (ABS WARNING LIGHT) 

NG: REPAIR OR REPLACE COMBINATION METER 

OK: REPLACE BRAKE ACTUATOR ASSY (See  REPLACEMENT  )