TC and CG Terminal Circuit: Procedure

1. Check if a CAN communication system DTC is output. Refer to DIAGNOSIS SYSTEM .
   RESULT
   
   

   Result	Proceed to
   DTC not output	A
   DTC output	B

B → See step   6 

A: Go to next step 

1. Turn the ignition switch to ON.
   Fig 1: Checking ECM (TC Of DLC3 Input)

   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
   C14-13 (TC) - C14-4 (CG)	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of DLC3

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → See step   5 

A: Go to next step 

1. Turn the ignition switch off.
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
   C14-13 (TC) - A36-27 (TC)	Always	Below 1 Ω
   C14-13 (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 2: Checking Harness And Connector (CG Of DLC3 - Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C14-4 (CG) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of DLC3

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Turn the ignition switch off.
   Fig 3: Checking ECM (TC Of DLC3 Input)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Reconnect the ECM connector.
3. Using SST, connect terminals TC and CG of the DLC3.
4. Turn the ignition switch to ON.
5. Check that the check engine warning light is blinking.
   TEXT IN ILLUSTRATION
   
   

   *a	Front view of DLC3

   OK

   Check engine warning light is blinking.

   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 .

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

OK → See step   7