ECD SYSTEM TC and CG Terminal Circuit

DESCRIPTION

Terminals TC and CG are located in the DLC3.

The DLC3 is located under the instrument panel under cover. When terminals TC and CG are connected, DTCs in normal mode or test mode can be read from the Malfunction Indicator Lamp (MIL) in the combination meter assembly.

Also, terminal SIL is located in the DLC3. This terminal is used for M-OBD communication with the intelligent tester.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DLC3 (CHECK VOLTAGE)

   
   
   1. 

      Text in Illustration

      *a	Front view of wire harness connector (to DLC3)

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

      Standard Voltage
      Tester Connection Condition Specified Condition G48-16 (BAT) - G48-4 (CG) Always 11 to 14 V

   
   

   NG

   CHECK DLC3 Click here

   OK

2. CHECK HARNESS AND CONNECTOR (ECM - DLC3)

   
   

   1. Disconnect the ECM connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition G61-15 (SIL) - G48-7 (SIL) Always Below 1 Ω G61-4 (TC) - G48-13 (TC) Always Below 1 Ω

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition G61-15 (SIL) or G48-7 (SIL) - Body ground Always 10 kΩ or higher G61-4 (TC) or G48-13 (TC) - Body ground Always 10 kΩ or higher

   3. Reconnect the ECM connector.

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE ECM Click here

3. CHECK DLC3

   
   
   1. 

      Text in Illustration

      *a	Front view of wire harness connector (to DLC3)

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition G48-4 (CG) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 - BATTERY)