Inspection Procedure

1. Turn the ignition switch on (IG).
2. Measure the voltage according to the value(s) in DLC3 TERMINAL VOLTAGE (TC TERMINAL VOLTAGE)  .

   Standard: 

   DLC3 TERMINAL VOLTAGE (TC TERMINAL VOLTAGE) (1 OF 2)
   
   

   Tester Connection	Condition	Specified Condition
   D20-13 (TC) - Body ground	Ignition switch on (IG)	10 to 14 V

3. Measure the resistance according to the value(s) in DLC3 TERMINAL VOLTAGE (TC TERMINAL VOLTAGE) (2 OF 2)  .

   Standard: 

   DLC3 TERMINAL VOLTAGE (TC TERMINAL VOLTAGE) (2 OF 2)
   
   

   Tester Connection	Specified Condition
   D20-4 (CG) - Body ground	Below 1 Ω

   Fig 1: Inspecting DLC3 Terminal Voltage (TC Terminal Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: Go to step   4 
2. OK: Go to next step. 

1. Disconnect the ECM connector.
2. Measure the resistance according to the value(s) in ECM TO DLC3  .

   Standard: 

   ECM TO DLC3 (1 OF 2)
   
   

   Tester Connection	Specified Condition
   A24-23 (TC) - D20-13 (TC)	Below 1 Ω

3. Measure the resistance according to the value(s) in ECM TO DLC3 (2 OF 2)  .

   Standard: 

   ECM TO DLC3 (2 OF 2)
   
   

   Tester Connection	Specified Condition
   D20-13 (TC) - Body ground	10 kΩ or higher

   Fig 2: Checking Harness And Connector (ECM To DLC3)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (TC TERMINAL CIRCUIT) 
2. OK: Go to next step. 

1. Check if the CAN communication system DTC is output (see DTC CHECK/CLEAR  ).

   Result: 

   CAN COMMUNICATION SYSTEM
   
   

   DTC is not output	A
   DTC is output	B

1. B: REPAIR CIRCUIT INDICATED BY OUTPUT CODE (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
2. A: REPLACE BRAKE ACTUATOR ASSY (SEE  REPLACEMENT  ) 

HINT:

If troubleshooting has been carried out according to the problem symptoms table, refer back to the table and proceed to the next step before replacing the part (see PROBLEM SYMPTOMS TABLE  ).

1. Disconnect the ECM connector.
2. Measure the resistance according to the value(s) in ECM TO DLC3 (1 OF 2)  .

   Standard: 

   ECM TO DLC3 (1 OF 2)
   
   

   Tester Connection	Specified Condition
   A24-23 (TC) - D20-13 (TC)	Below 1 Ω

3. Measure the resistance according to the value(s) in ECM TO DLC3 (2 OF 2)  .

   Standard: 

   ECM TO DLC3 (2 OF 2)
   
   

   Tester Connection	Specified Condition
   D20-13 (TC) - Body ground	10 kΩ or higher

   Fig 3: Checking Harness And Connector (ECM To DLC3)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (TC CIRCUIT) 
2. OK: Go to next step. 

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

   Standard: 

   DLC3 TO BODY GROUND
   
   

   Tester Connection	Specified Condition
   D20-4 (CG) - Body ground	Below 1 Ω

   Fig 4: Checking Harness And Connector (DLC3 To Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) 
2. OK: Go to next step. 

1. Using the SST, connect the terminals TC and CG of the DLC3.

   SST 09843-18040

2. Check that the engine warning light is blinking.

   Result: 

   ECM (DLC3 (TC) INPUT)
   
   

   Engine warning light is blinking	A
   Engine warning light is not blinking	B

   Fig 5: Checking ECM (DLC3 (TC) INPUT)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. B: REPLACE ECM (SEE  REPLACEMENT  ) 
2. A: Go to next step. 

1. Check if the CAN communication system DTC is output (see DTC CHECK/CLEAR  ).

   Result: 

   CAN COMMUNICATION SYSTEM
   
   

   DTC is not output	A
   DTC is output	B

1. B: REPAIR CIRCUIT INDICATED BY OUTPUT CODE (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
2. A: REPLACE BRAKE ACTUATOR ASSY (SEE  REPLACEMENT  ) 

HINT:

If troubleshooting has been carried out according to the problem symptoms table, refer back to the table and proceed to the next step before replacing the part (see PROBLEM SYMPTOMS TABLE  ).