TC and CG Terminal Circuit: Procedure

1. Turn the engine switch on (IG).

   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
   N20-13 (TC) - N20-4 (CG)	Engine switch on (IG)	11 to 14 V

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   *1

   DLC3

NG → See step   3 

OK: Go to next step 

B → See step   7 

A: Go to next step 

1. Turn the engine switch off.
2. Disconnect the A21 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N20-13 (TC) - A21-21 (TC)	Always	Below 1 Ω
   N20-13 (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.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N20-4 (CG) - Body ground	Always	Below 1 Ω

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   *1

   DLC3

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Turn the engine switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Reconnect the ECM connector.
3. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
   • SST: 09843-18040 
4. Turn the engine switch on (IG).
5. Check that the MIL is blinking.
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   *1

   DLC3

   RESULT
   
   

   Result	Proceed to
   MIL is blinking	A
   MIL 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 [12/2011 - ] .

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

A → See step   6