TC and CG Terminal Circuit: Procedure

1. Check if the CAN communication system DTC is output. Refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   CAN communication system DTC is not output	A
   CAN communication system DTC is output	B

B → INSPECT CAN COMMUNICATION SYSTEM 

A: Go to next step 

1. Turn the ignition switch to the ON position.
   Fig 1: Identifying DLC3 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   D1-13 (TC) - D1-4 (CG)	Ignition switch ON	10 to 14 V

   Result

   Result	Proceed to
   NG	A
   OK	B

B → See step   5 

A: Go to next step 

1. Turn the ignition switch off.
   Fig 2: Identifying DLC Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D1-13 (TC) - E4-23 (TC)	Always	Below 1 Ω
   D1-13 (TC) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 3: Identifying DLC3 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D1-4 (CG) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the ECM connector.
   Fig 4: Identifying DLC3 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Using SST, connect terminals TC and CG of the DLC3.
   • SST: 09843-18040 
3. Turn the ignition switch to the ON position.
4. Check that the check engine warning light is blinking.

   Result

   Result	Proceed to
   Check engine warning light is blinking	A
   Check engine warning light is not blinking	B

   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. Refer to PROBLEM SYMPTOMS TABLE .

B → REPAIR OR REPLACE WIRE HARNESS OR ECM (TC of ECM CIRCUIT) 

A → REPLACE BRAKE ACTUATOR ASSEMBLY