Code No.B1438: Side impact sensor (LH) communication error
Code No.B1439: Side impact sensor (LH) communication impossible




OPERATION



DIAGNOSIS CODE SET CONDITIONS



PROBABLE CAUSES



  • Damaged wiring harnesses or connectors
  • Malfunction of the side impact sensor (LH)
  • Malfunction of the SRS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check the side impact sensor (LH).
(1)Disconnect the negative battery terminal.
(2)Alternate the side impact sensor (LH) and the side impact sensor (RH), and then install the alternated sensor.
(3)Connect the negative battery terminal.
(4)Erase diagnosis code from memory, and check the diagnosis code.

Q. Is diagnosis code B1428 or B1429 set?
Replace the side impact sensor (LH) with a new one. (Refer to ). Go to Step 3.
Go to Step 2.

STEP 2. Check the harness wires for open circuit and short circuit between SRS-ECU connector C-153 (terminal No.15 and 16) and side impact sensor (LH) connector D-34 (terminal No.2 and 1).





Q. Is the check result normal?

Go to Step 3.

Repair the harness wires between SRS-ECU connector C-153 (terminal No.15 and 16) and side impact sensor (LH) connector D-34 (terminal No.2 and 1).

STEP 3. Check whether the diagnosis code is reset.

Q. Is diagnosis code B1438 or B1439 set?
Replace the SRS-ECU (Refer to ).
An intermittent malfunction is suspected (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).