Code No.B1428: Side impact sensor (RH) communication error
Code No.B1429: Side impact sensor (RH) communication impossible













caution If diagnosis code B1428 or B1429 is set in the SRS-ECU, always diagnose the CAN main bus line.

OPERATION




DIAGNOSIS CODE SET CONDITIONS




PROBABLE CAUSES



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

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics


Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?

Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54D, Diagnosis ).

STEP 2. Check whether the diagnosis code is reset.


Check again if the diagnosis code is set.
(1)Erase the diagnosis code.
(2)Ignition: "LOCK" (OFF) position to "ON"
(3)On completion, check that the diagnosis code is not reset.

Q. Is the diagnosis code set?

Go to Step 3.
There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

STEP 3.Check the side impact sensor (RH).


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

Q. Is diagnosis code B1438 or B1439 set?

Replace the side impact sensor (front) (RH) with a new one (Refer to ). Then go to Step 5.
Go to Step 4.

STEP 4. Check the harness wires for open circuit or short circuit between SRS-ECU connector D-23 (terminal No.63 and 64) and side impact sensor (front) (RH) connector E-28 (terminal No.1 and 2).


Q. Is the check result normal?

Go to Step 5.
Repair the harness wires between SRS-ECU connector D-23 (terminal No.63 and 64) and side impact sensor (front) (RH) connector E-28 (terminal No.1 and 2).

STEP 5. Check whether the diagnosis code is reset.


Q. Is diagnosis code B1428 or B1429 set?

Replace the SRS-ECU (Refer to ).
An intermittent malfunction is suspected (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).