PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2071

DESCRIPTION

This DTC is stored when a malfunction in the stop light operation relay circuit of the vehicle stability control system is detected. This circuit consists of the master cylinder solenoid (skid control ECU) and seat belt control ECU. Signals are sent from the master cylinder solenoid (skid control ECU) via the CAN communication line.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK DTC (CAN COMMUNICATION SYSTEM)

   
   

   1. Use the intelligent tester to check if the CAN communication system is functioning normally (Click herefor LHD,Click herefor RHD).

      Table 1. Result

      Result	Proceed to
      OK (DTC U0122 is not output)	A
      NG (for LHD)	B
      NG (for RHD)	C

      Tip:

      DTC U0122: Lost Communication with Skid Control ECU

   
   
   • AClick here
   • BClick here
   • CClick here
2. Click here

   CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)

   
   

   1. Using the intelligent tester, enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Code.

   2. Clear the DTCs (Click here).

   3. Check for DTCs (Click here).

      OK
      DTC C1380 is not output.

      Tip:

      DTC C1380: Stop Light Control Relay Malfunction

   
   
   • OKClick here
   • NGClick here
3. Click here

   CHECK DTC (PRE-CRASH SAFETY SYSTEM)

   
   

   1. Using the intelligent tester, enter the following menus: Body / Pre-Crash / Trouble Code.

   2. Clear the DTCs (Click here).

   3. Check for DTCs (Click here).

      Table 2. Result

      Result	Proceed to
      OK (DTC B2071 is not output)	A
      NG (for LHD)	B
      NG (for RHD)	C

   
   
   • AClick here
   • BClick here
   • CClick here
4. Click here

   USE SIMULATION METHOD TO CHECKClick here

5. Click here

   GO TO CAN COMMUNICATION SYSTEMClick here

6. Click here

   GO TO CAN COMMUNICATION SYSTEMClick here

7. Click here

   GO TO VEHICLE STABILITY CONTROL SYSTEM (DTC C1380)Click here

8. Click here

   REPLACE SEAT BELT CONTROL ECUClick here

9. Click here

   REPLACE SEAT BELT CONTROL ECUClick here