CAN COMMUNICATION SYSTEM ECM Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
ECM Communication Stop Mode

Either condition is met:


  • "ECM (Engine)" is not displayed on "Bus Check".

  • "ECM Communication Stop Mode" in "DTC Combination Table" applies.

  • Power source or inside ECM

  • ECM

WIRING DIAGRAM

A003B6CE06
A003B6CE05
A003I7YE01
A003I7YE04
A003I7YE03

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ECM - BATTERY AND BODY GROUND)


    1. Disconnect the ECM connectors.

      A003EAQE14
      Text in Illustration
      *A for 1KD-FTV (w/ DPF) *B for 1KD-FTV (w/o DPF)
      *C for 2KD-FTV *D for 1TR-FE, 2TR-FE
      *E for 5L-E - -
      *a

      Front view of wire harness connector

      (to ECM)

      		 - -

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

      Standard Resistance
      for 1KD-FTV (w/ DPF)
      Tester Connection Condition Specified Condition
      B73-32 (EC) - Body ground Always Below 1 Ω
      D99-44 (E02) - Body ground Always Below 1 Ω
      D99-45 (E01) - Body ground Always Below 1 Ω
      D99-109 (E1) - Body ground Always Below 1 Ω
      for 1KD-FTV (w/o DPF)
      Tester Connection Condition Specified Condition
      B72-32 (EC) - Body ground Always Below 1 Ω
      D98-44 (E02) - Body ground Always Below 1 Ω
      D98-45 (E01) - Body ground Always Below 1 Ω
      D98-109 (E1) - Body ground Always Below 1 Ω
      for 2KD-FTV
      Tester Connection Condition Specified Condition
      B88-32 (EC) - Body ground Always Below 1 Ω
      D105-44 (E02) - Body ground Always Below 1 Ω
      D105-45 (E01) - Body ground Always Below 1 Ω
      D105-109 (E1) - Body ground Always Below 1 Ω
      for 1TR-FE, 2TR-FE
      Tester Connection Condition Specified Condition
      B71-32 (EC) - Body ground Always Below 1 Ω
      D97-45 (E02) - Body ground Always Below 1 Ω
      D97-46 (E01) - Body ground Always Below 1 Ω
      D97-105 (E1) - Body ground Always Below 1 Ω
      for 5L-E
      Tester Connection Condition Specified Condition
      B74-50 (EC) - Body ground Always Below 1 Ω
      D100-44 (E02) - Body ground Always Below 1 Ω
      D100-45 (E01) - Body ground Always Below 1 Ω
      D100-109 (E1) - Body ground Always Below 1 Ω

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

      Standard Voltage
      for 1KD-FTV (w/ DPF)
      Tester Connection Condition Specified Condition
      B73-2 (BATT) - Body ground Always 11 to 14 V
      B73-1 (+B) - Body ground Battery positive (+) voltage applied to terminal B73-45 (MREL) 11 to 14 V
      B73-20 (+B2) - Body ground Battery positive (+) voltage applied to terminal B73-45 (MREL) 11 to 14 V
      B73-25 (IGSW) - Body ground Ignition switch ON 11 to 14 V
      for 1KD-FTV (w/o DPF)
      Tester Connection Condition Specified Condition
      B72-2 (BATT) - Body ground Always 11 to 14 V
      B72-1 (+B) - Body ground Battery positive (+) voltage applied to terminal B72-45 (MREL) 11 to 14 V
      B72-20 (+B2) - Body ground Battery positive (+) voltage applied to terminal B72-45 (MREL) 11 to 14 V
      B72-25 (IGSW) - Body ground Ignition switch ON 11 to 14 V
      for 2KD-FTV
      Tester Connection Condition Specified Condition
      B88-2 (BATT) - Body ground Always 11 to 14 V
      B88-1 (+B) - Body ground Battery positive (+) voltage applied to terminal B88-28 (MREL) 11 to 14 V
      B88-25 (IGSW) - Body ground Ignition switch ON 11 to 14 V
      for 1TR-FE, 2TR-FE
      Tester Connection Condition Specified Condition
      B71-20 (BATT) - Body ground Always 11 to 14 V
      B71-2 (+B) - Body ground Battery positive (+) voltage applied to terminal B71-44 (MREL) 11 to 14 V
      B71-27 (IGSW) - Body ground Ignition switch ON 11 to 14 V
      for 5L-E
      Tester Connection Condition Specified Condition
      B74-2 (BATT) - Body ground Always 11 to 14 V
      B74-1 (+B) - Body ground Battery positive (+) voltage applied to terminal B74-5 (MREL) 11 to 14 V
      B74-25 (IGSW) - Body ground Ignition switch ON 11 to 14 V

      Tech Tips

      *: Replacement procedure:



    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM*