ECD SYSTEM TC and CG Terminal Circuit

DESCRIPTION


  1. DESCRIPTION


    1. Terminals TC and CG are located in the DLC3.

      The DLC3 is located under the finish lower panel. When terminals TC and CG are connected, DTC in normal mode or test mode can be read from the check engine warning light in the combination meter. Also, terminal SIL is located in the DLC3. This terminal is used by the M-OBD communication with intelligent tester.

WIRING DIAGRAM

A01KFF7E01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK ENGINE WARNING LIGHT CONDITION


    1. A01KG5H

      Turn the ignition switch ON.

    2. Using SST, connect terminals TC and CG of the DLC3.

      SST
      09843-18040

    3. Check the engine warning light condition.

      Check engine warning light
      Blinking

      Tech Tips

      If this inspection OK and there is no intelligent tester, do not need to do the following steps and this circuit is OK. Proceed to next circuit inspection shown on problem symptom table Click here.


    OK

    READ OUTPUT DTC OF INTELLIGENT TESTER (INCLUDING NORMAL DTC) Click here

    NG

  2. CHECK DLC3 (CHECK VOLTAGE)


    1. A01KGE0E02
      Text in Illustration
      *1 DLC3

      Turn the ignition switch ON.

    2. Check the voltage between terminals of the DLC3 as shown in the table and illustration.

      Voltage

      Terminal

      (Positive terminal ←→ Negative terminal)

      		 Voltage
      TC (13) ←→ CG (4) 9 - 14 V

    OK

    CHECK ECM (CHECK VOLTAGE) Click here

    NG

  3. CHECK DLC3 (CHECK CONTINUITY)


    1. A01KGE0E03
      Text in Illustration
      *1 DLC3

      Check the continuity between terminals of the DLC3 as shown in the illustration and table.

      Continuity (Check for open)

      Terminal

      (DLC3 ←→ Body ground)

      		 Standard
      CG (4) ←→ Body ground continuity

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  4. CHECK WIRE HARNESS (ECM - DLC3)


    1. A01KEHFE01

      Disconnect the ECM (E10) connector.

    2. Check the continuity between terminals of the DLC3 and ECM connectors as shown in the illustration and table.

      Continuity (Check for open)

      Terminal

      (DLC3 ←→ ECM)

      		 Standard
      TC (13) ←→ TC (E10-18) Continuity
      Continuity (Check for short)

      Terminal

      (DLC3 ←→ ECM(Ground))

      		 Standard
      TC (13) ←→ E1 (E7-22) No continuity

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  5. CHECK ECM (CHECK VOLTAGE)


    1. A01KGF1E12

      Turn the ignition switch ON.

    2. Check the voltage between terminals of the ECM as shown in the table and illustration.

      Voltage

      Terminal

      (Positive terminal ←→ Negative terminal)

      		 Voltage
      W (E10-12) ←→ Body ground 9 - 14 V

    OK

    CHECK AND REPLACE ECM

    NG

  6. CHECK BULB (ENGINE WARNING LIGHT)


    NG

    REPLACE BULB

    OK

  7. CHECK WIRE HARNESS (ECM - COMBINATION METER)


    1. A01KI4AE01

      Disconnect the combination meter (C9) connector.

    2. Disconnect the ECM (E10) connector.

    3. Check the continuity between terminals of the combination meter and ECM connectors as shown in the illustration and table.

      Continuity (Check for open)

      Terminal

      (Combination meter ←→ ECM)

      		 Standard
      C9-6 ←→ W (E10-12) Continuity
      Continuity (Check for short)

      Terminal

      (Combination meter ←→ ECM)

      		 Standard
      W (E10-12) ←→ E1 (E7-22) No continuity

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  8. READ OUTPUT DTC OF INTELLIGENT TESTER (INCLUDING NORMAL DTC)


    NG

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOM TABLE Click here

    OK

  9. CHECK DLC3 (CHECK VOLTAGE)


    1. A01KGE0E04
      Text in Illustration
      *1 DLC3

      Turn the ignition switch ON.

    2. Check the voltage between terminals of the DLC3 as shown in the table and illustration.

      Voltage

      Terminal

      (Positive terminal ←→ Negative terminal)

      		 Voltage
      BAT (16) ←→ Body ground 9 - 14 V

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  10. CHECK WIRE HARNESS (ECM - DLC3)


    1. A01KEHFE02

      Disconnect the ECM (E10) connector.

    2. Check the continuity between terminals of the DLC3 and ECM connectors as shown in the illustration and table.

      Continuity (Check for open)

      Terminal

      (DLC3 ←→ ECM)

      		 Standard
      SIL (7) ←→ SIL (E10-19) Continuity
      Continuity (Check for short)

      Terminal

      (DLC3 ←→ ECM (Ground))

      		 Standard
      SIL (7) ←→ E1 (E7-22) No continuity

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    REPAIR OR REPLACE ECM Click here