TC and CG Terminal Circuit: Procedure

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

   Result

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

B → See step   7 

A: Go to next step 

1. Turn the engine switch on (IG).
   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
   J21-13 (TC) - J21-4 (CG)	Engine switch on (IG)	11 to 14 V

   Result

   Result	Proceed to
   NG	A
   OK	B

B → See step   5 

A: Go to next step 

1. Turn the engine switch off.
   Fig 2: Identifying 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
   J21-13 (TC) - A6-3 (TC)	Always	Below 1 Ω
   J21-13 (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
   J21-4 (CG) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Turn the engine switch off.
   Fig 4: Identifying DLC3 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Reconnect the ECM connector.
3. Using SST, connect terminals TC and CG of the DLC3.
   • SST: 09843-18040 
4. Turn the engine switch on (IG).
5. 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 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 → See step   6