Code No.B1551: SRS warning lamp circuit open-circuited (Lamp does not Switch Off).




OPERATION



  • Power for the SRS warning lamp is supplied from the ignition switch (IG1) circuit.
  • The SRS warning lamp illuminates when the ignition switch is turned to the "ON" position and goes out after approximately 7 seconds if there is not a malfunction in the SRS system.

DIAGNOSIS CODE SET CONDITIONS



  • This diagnosis code will be set if an open circuit has occurred in the wiring harness between the SRS warning lamp and the SRS-ECU.

TROUBLESHOOTING HINTS



  • Damaged wiring harnesses of connectors
  • Malfunction of the SRS-ECU
  • Malfunction of the combination meter

DIAGNOSIS PROCEDURE

STEP 1. Check the harness for open circuit to earth between SRS-ECU connector C-131 (terminal No.8) and combination meter connector C-113 (terminal No.18).




  • Check the SRS warning lamp output lines of open circuit

Q. Is the check result normal?

Go to Step 2.

Repair the harness wire between SRS-ECU connector C-131 (terminal No.8) and combination meter connector C-113 (terminal No.18).

STEP 2. Check whether the diagnosis code is reset.

Q. Is diagnosis code B1551 set?
Replace the SRS-ECU (Refer to ).
An intermittent malfunction is suspected (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).