Inspection Procedure

1. Connect the intelligent tester to the DLC3.
2. Turn the engine switch on (IG).
3. Select the ACTIVE TEST mode on the intelligent tester.

   ABS / VSC: 

   ABS / VSC REFERENCE CHART
   
   

   Item (Display)	Vehicle Condition / Test Details	Diagnostic Note
   Electronically Controlled Brake System RELAY	Turns Electronically Controlled Brake System main relay ON / OFF	Operation of relay (clicking sound) can be heard
   Electronically Controlled Brake System RELAY 2	Turns Electronically Controlled Brake System main relay 2 ON / OFF	Operation of relay (clicking sound) can be heard

4. Check the operation sound of the Electronically Controlled Brake System main relay when operating it with the intelligent tester.

   OK: 

   The operation sound of the Electronically Controlled Brake System main relay is heard. 

NG:  Go to step  5

OK: Go to next step 

1. Remove the ABS1, ABS MAIN2 and ABS MAIN3 fuses from the engine room R/B (J/B) No.1.
2. Check the ABS1, ABS MAIN2 and ABS MAIN3 fuses.

   Resistance: 

   Below 1 Ω (Continuity) 

NG: REPLACE FUSE (ABS1 OR ABS MAIN FUSE) 

OK: Go to next step 

1. Remove the ABS MAIN1 relay and ABS MAIN2 relay.
2. Measure the resistance according to the value(s) in the table below.

   Resistance 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Condition	Specified Condition
   3 - 5	Always	10 kΩ or higher (No continuity)
   3 - 5	Apply B+ between terminal 1 and 2	Below 1 Ω (Continuity)

Fig 1: Inspecting ABS Main Relay (1, 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ABS MAIN RELAY 

OK: Go to next step 

1. Disconnect the skid control ECU (A13, A15) connectors.
2. Measure the voltage according to the value(s) in the table below.

   Voltage 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Specified Condition
   A13-39 (DI1) - Body ground	10 to 14 V
   A15-33 (DI2) - Body ground	10 to 14 V

Fig 2: Identifying Skid Control ECU (A13, A15) Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (DI CIRCUIT) 

OK: Go to next step 

1. Disconnect the skid control ECU (A13, A15) connectors.
2. Remove the ABS MAIN1 relay and ABS MAIN2 relay.
3. Measure the resistance according to the value(s) in the table below.

   Resistance 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Specified Condition
   A13-2 (BS1) - ABS MAIN1 relay (3)	Below 1 Ω
   A13-30 (R1+) - ABS MAIN1 relay (1)	Below 1 Ω
   A13-38 (DO1) - ABS MAIN1 relay (5)	Below 1 Ω
   A13-46 (R3+) - ABS MAIN1 relay (2)	Below 1 Ω
   A15-2 (BS2) - ABS MAIN2 relay (3)	Below 1 Ω
   A15-26 (R2+) - ABS MAIN2 relay (1)	Below 1 Ω
   A15-34 (DO2) - ABS MAIN2 relay (5)	Below 1 Ω
   A15-40 (R4+) - ABS MAIN2 relay (2)	Below 1 Ω

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

   Resistance 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Specified Condition
   A13-2 (BS1) - Body ground	10 kΩ or higher
   A13-30 (R1+) - Body ground	10 kΩ or higher
   A13-38 (DO1) - Body ground	10 kΩ or higher
   A13-46 (R3+) - Body ground	10 kΩ or higher
   A15-2 (BS2) - Body ground	10 kΩ or higher
   A15-26 (R2+) - Body ground	10 kΩ or higher
   A15-34 (DO2) - Body ground	10 kΩ or higher
   A15-40 (R4+) - Body ground	10 kΩ or higher

Fig 3: Identifying Skid Control ECU Connectors And Engine Room No.3 R/B

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Clear the DTC (see DTC CHECK / CLEAR ).
2. Turn the engine switch on (IG).
3. Check if the same DTCs are recorded (see DTC CHECK / CLEAR ).

   HINT:

   Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

Result 

B: REPLACE SKID CONTROL ECU 

A: END