B1690

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1635/24,B1637/82,B1690/15,B1692/81: Rear Airbag Sensor LH Circuit Malfunction

DESCRIPTION

HINT
"Door side airbag sensor RH" refer to the side airbag sensor RH.

* For DTC B1690 and B1635:

The rear airbag sensor LH and side airbag sensor RH consists of the safing sensor, the diagnostic circuit, the lateral deceleration sensor, etc.

If the center airbag sensor receives signals from the lateral deceleration sensor, it determines whether the SRS should be activated.

DTC B1690/15 or B1635/24 is stored when a malfunction is detected in the rear airbag sensor LH or side airbag sensor RH circuit.

* For DTC B1692 and B1637:

The circuit for the side collision sensor RH or LH (to determine deployment of the front seat airbag RH or LH, rear seat side airbag RH or LH and curtain shield airbag RH or LH) is composed of the center airbag sensor, side airbag sensor RH or LH, and rear airbag sensor RH or LH.

The side airbag sensor RH or LH, and rear airbag sensor RH or LH detect impacts to the vehicle and send signals to the center airbag sensor to determine if the airbag should be deployed.

DTC B1692 or B1637 is stored when a malfunction is detected in the circuit for the side collision sensor RH or LH (to determine deployment of the front seat airbag RH or LH, rear seat side airbag RH or LH, and curtain shield airbag RH or LH).





WIRING DIAGRAM









INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC

(a) Turn the engine switch on (IG), and wait for at least 60 seconds.

(b) Clear the DTCs stored in the memory DTC Check / Clear.

(c) Turn the engine switch off.

(d) Turn the engine switch on (IG), and wait for at least 60 seconds.

(e) Check for DTCs DTC Check / Clear.

Result:





HINT
Codes other than DTC B1635, B1637, B1690 and B1692 may be output at this time, but they are not related to this check.

B -- CHECK REAR AIRBAG SENSOR LH

A -- USE SIMULATION METHOD TO CHECK Diagnosis System
C -- Continue to next step.

2. CHECK SIDE AIRBAG SENSOR RH





(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

(c) Interchange the side airbag sensor RH with LH and connect the connectors to them.

(d) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

(e) Turn the engine switch on (IG), and wait for at least 60 seconds.

(f) Clear the DTCs stored in the memory DTC Check / Clear.

(g) Turn the engine switch off.

(h) Turn the engine switch on (IG), and wait for at least 60 seconds.

(i) Check for DTCs DTC Check / Clear.

Result:





HINT
Codes other than DTC B1690, B1692, B1695 and B1697 may be output at this time, but they are not related to this check.

(j) Turn the engine switch off.

(k) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

(l) Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.

B -- REPLACE SIDE AIRBAG SENSOR RH Removal

A -- USE SIMULATION METHOD TO CHECK Diagnosis System

C -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

3. CHECK REAR AIRBAG SENSOR LH





(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

(c) Temporarily replace the rear airbag sensor LH with a new one.

(d) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

(e) Turn the engine switch on (IG), and wait for at least 60 seconds.

(f) Clear the DTCs stored in the memory DTC Check / Clear.

(g) Turn the engine switch off.

(h) Turn the engine switch on (IG), and wait for at least 60 seconds.

(i) Check for DTCs DTC Check / Clear.

OK:

DTC B1635 and B1637 are not output.

HINT
Codes other than DTC B1635 and B1637 may be output at this time, but they are not related to this check.

NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

OK -- REPLACE REAR AIRBAG SENSOR LH Removal