DYNAMIC REAR STEERING SYSTEM, Diagnostic DTC:C1B26/36, C1B2A/38

DTC Code DTC Name
C1B26/36 Motor Power Supply Voltage Circuit(ECU Start-up)
C1B2A/38 Motor Power Supply Voltage Circuit

DESCRIPTION

When the DRS ECU (rear steering control ECU) detects a problem with the PIG power source circuit, DTC C1B26/36 and C1B2A/38 are stored.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition
C1B26/36 Motor Power Supply Voltage Circuit(ECU Start-up)

All conditions are met:


  • The engine switch is on (IG).

  • Control has not started.

  • An open in the PIG circuit or an internal malfunction in the ECU is detected for approximately 1.5 seconds or more.

  • ARS fuse

  • DRS ECU (rear steering control ECU)

  • Harness or connector

 Comes on Engine switch on (IG) again
C1B2A/38 Motor Power Supply Voltage Circuit

All conditions are met:


  • The engine switch is on (IG).

  • When the PIG voltage is 18.5 V or higher or 7 V or less, an open or short in the PIG circuit, or an internal malfunction in the ECU is detected for approximately 2.4 seconds or more.

  • ARS fuse

  • DRS ECU (rear steering control ECU)

  • Harness or connector

 Comes on Engine switch on (IG) again

WIRING DIAGRAM

B000TYOE17
*a from Battery
*b ARS
*c GNDY
*d DRS ECU (Rear Steering Control ECU)

CAUTION / NOTICE / HINT

Note


  • When replacing the DRS ECU (rear steering control ECU), perform neutral position memorization and motor rotation angle sensor calibration.

    Click here

  • Since DTC C15C9/76 is stored in the VGRS ECU (front steering control ECU), after performing repairs on the dynamic rear steering system, clear the DTCs for the VGRS system.

  • Before performing troubleshooting, turn off the remote service function.

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

PROCEDURE


  1. READ VALUE USING GTS (PIG POWER SUPPLY VOLTAGE)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / DRS / Data List.


      Chassis > DRS > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      PIG Power Supply Voltage PIG power supply voltage

      Min.: 0.00 V

      Max.: 255.99 V

      		 11 to 14 V -

      Chassis > DRS > Data List
      Tester Display
      PIG Power Supply Voltage
      OK
      11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. INSPECT DRS ECU (REAR STEERING CONTROL ECU) (PIG, GNDY TERMINAL)


    1. Turn the engine switch off.

    2. Check the connection condition of the DRS ECU (rear steering control ECU) connector.

    3. B000TXYC08
      *a

      Component without harness connected

      (DRS ECU [Rear Steering Control ECU])

      Disconnect the b3 DRS ECU (rear steering control ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4 (PIG) - 5 (GNDY) Always 100 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE DRS ECU (REAR STEERING CONTROL ECU) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (PIG CIRCUIT)


    1. Turn the engine switch off.

    2. Disconnect the b3 DRS ECU (rear steering control ECU) connector.

    3. B000Z4EC22
      *a

      Front view of wire harness connector

      (to DRS ECU [Rear Steering Control ECU])

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

      Standard Voltage:
      Tester Connection Condition Specified Condition
      b3-4 (PIG) - b3-5 (GNDY) Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE DRS ECU (REAR STEERING CONTROL ECU) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR