Inspection Procedure

1. Check if the connector is connected.

OK: The connector should be securely connected. 

1. NG: CONNECT CONNECTOR TO ECU CORRECTLY 
2. OK: GO TO NEXT STEP. 

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

   Standard: 

   SKID CONTROL ECU AND ECM TERMINALS RESISTANCE
   
   

   Tester Connection	Specified Condition
   S1-10(NEO)-E6-17(NEO)	Below 1 Ω

3. Measure the resistance according to the value (s) in the table below.

   Standard: 

   SKID CONTROL ECU TERMINAL AND BODY GROUND RESISTANCE
   
   

   Tester Connection	Specified Condition
   S1-10 (NEO) - Body ground	10 kΩ or higher

   Fig 1: Disconnecting ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
2. OK: GO TO NEXT STEP. 

1. Reconnect the ECM connector and the skid control ECU connector.
2. Check the signal waveform between terminal NEO (E6-17) of the ECM and body ground for the engine conditions below.

   Standard: 

   Fig 2: Identifying ECM Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 3: ECM Terminals Voltage Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 4: Signal Waveform Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPLACE ECM (SEE  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
2. OK: GO TO NEXT STEP. 

1. Clear the DTCs (see DTC CHECK/CLEAR ).
2. Turn the ignition switch to the ON position.

Are the same DTCs recorded? 

1. NO: END 

   HINT: This DTC may be memorized due to a malfunction in the connector terminal.

2. YES: GO TO NEXT STEP. 

   REPLACE ABS & TRACTION ACTUATOR ASSY (SEE  REPLACEMENT  )