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Home >> Infiniti >> 2017 >> QX70 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 257 (Steering Control System (Diagnostic Trouble Codes (DTCS) C13A8-00 - C13D3-00) (Hybrid)) >> DTC C13BE-00: - C13C4-00 FLEXRAY Communication >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK FLEXRAY COMMUNICATION CIRCUIT

    1. Turn the ignition switch OFF.
    2. Disconnect each control module harness connector.
    3. Check the continuity between each control module harness connector.
      Steering force control module Steering angle main control module Continuity
      Connector Terminal Connector Terminal
      M71 19 E26 19 Existed
      20 20
      Steering angle main control module Steering angle sub control module Continuity
      Connector Terminal Connector Terminal
      E26 19 E29 19 Existed
      20 20
      Steering force control module Steering angle sub control module Continuity
      Connector Terminal Connector Terminal
      M71 19 E29 19 Existed
      20 20
    4. Check the continuity between control module harness connector and ground.
      Steering force control module - Continuity
      Connector Terminal
      M71 19 Ground Not existed
      20
      Steering angle main control module - Continuity
      Connector Terminal
      E26 19 Ground Not existed
      20
      Steering angle sub control module - Continuity
      Connector Terminal
      E29 19 Ground Not existed
      20

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair or replace error - detected part.

  2. CHECK STEERING FORCE CONTROL MODULE POWER SUPPLY CIRCUIT (1)

    1. Disconnect steering force control module harness connector.
    2. Check the voltage between steering force control module harness connector and ground.
      Steering force control module - Voltage (Approx.)
      Connector Terminal
      M72 34 Ground 10.5 - 16.0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    GO TO STEP 3  .

  3. CHECK STEERING FORCE CONTROL MODULE POWER SUPPLY CIRCUIT (2)

    1. Check the 60A fusible link (#G).
    2. Check the harness for open or short between steering force control module harness connector No. 34 terminal and the 60A fusible link (#G).

    Is the inspection result normal?

    YES 

    Perform the trouble diagnosis for battery power supply circuit. Refer to WIRING DIAGRAM - BATTERY POWER SUPPLY - .

    NO 

    Repair or replace error - detected parts.

  4. CHECK STEERING ANGLE MAIN CONTROL MODULE POWER SUPPLY CIRCUIT (1)

    1. Disconnect steering angle main control module harness connector.
    2. Check the voltage between steering angle main control module harness connector and ground.
      Steering angle main control module - Voltage (Approx.)
      Connector Terminal
      E27 34 Ground 10.5 - 16.0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    GO TO STEP 5  .

  5. CHECK STEERING ANGLE MAIN CONTROL MODULE POWER SUPPLY CIRCUIT (2)

    1. Check the 100A fusible link (#J).
    2. Check the harness for open or short between steering angle main control module harness connector No. 34 terminal and the 100A fusible link (#J).

    Is the inspection result normal?

    YES 

    Perform the trouble diagnosis for battery power supply circuit. Refer to WIRING DIAGRAM - BATTERY POWER SUPPLY - .

    NO 

    Repair or replace error - detected parts.

  6. CHECK STEERING ANGLE SUB CONTROL MODULE POWER SUPPLY CIRCUIT (1)

    1. Disconnect steering angle sub control module harness connector.
    2. Check the voltage between steering angle sub control module harness connector and ground.
      Steering angle sub control module - Voltage (Approx.)
      Connector Terminal
      E30 34 Ground 10.5 - 16.0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 8  .

    NO 

    GO TO STEP 7  .

  7. CHECK STEERING ANGLE SUB CONTROL MODULE POWER SUPPLY CIRCUIT (2)

    1. Check the 100A fusible link (#H).
    2. Check the harness for open or short between steering angle sub control module harness connector No. 34 terminal and the 100A fusible link (#H).

    Is the inspection result normal?

    YES 

    Perform the trouble diagnosis for battery power supply circuit. Refer to WIRING DIAGRAM - BATTERY POWER SUPPLY - .

    NO 

    Repair or replace error - detected parts.

  8. CHECK IGNITION POWER SUPPLY CIRCUIT

    Check ignition power supply circuit. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES 

    GO TO STEP 9  .

    NO 

    Repair or replace error - detected parts.

  9. CHECK INTERMITTENT INCIDENT

    1. Turn the ignition switch OFF.
    2. Check enlarged contact spring of terminal. Refer to HOW TO CHECK TERMINAL .
    3. Perform intermittent incident while turning steering wheel. Refer to INTERMITTENT INCIDENT .

    Is the inspection result normal?

    YES 

    Replace steering angle main control module, steering angle sub control module and steering force control module. Refer to REMOVAL AND INSTALLATION , REMOVAL AND INSTALLATION and REMOVAL AND INSTALLATION .

    NO 

    Repair or replace error - detected part.

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