Seat Occupant Sensor: Service and Repair

Occupant Classification ECU:

OCCUPANT CLASSIFICATION ECU

REMOVAL

1. PRECAUTION

CAUTION: Be sure to read "PRECAUTION", refer to Restraint Systems Service Precautions thoroughly before servicing.

2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL (for Manual Seat)

CAUTION: Wait for 90 seconds after disconnecting the cable to prevent airbag deployment.

3. REMOVE FRONT SEAT HEADREST ASSEMBLY (for Manual Seat)
4. REMOVE SEAT TRACK COVER RH (for Manual Seat)
5. REMOVE INNER SEAT TRACK BRACKET COVER RH (for Manual Seat)
6. REMOVE FRONT SEAT ASSEMBLY RH (for Manual Seat)
7. REMOVE FRONT SEAT HEADREST ASSEMBLY (for Power Seat)
8. REMOVE SEAT TRACK COVER RH (for Power Seat)

HINT: Use the same procedure for the RH side and the LH side.

9. REMOVE INNER SEAT TRACK BRACKET COVER RH (for Power Seat)

HINT: Use the same procedure for the RH side and the LH side.

10. REMOVE FRONT SEAT ASSEMBLY RH (for Power Seat)

HINT: Use the same procedure for the RH side and the LH side.

11. REMOVE OCCUPANT CLASSIFICATION ECU
a. Disconnect the connector from the occupant classification ECU.

NOTE: When handling the airbag connector, take care not to damage the airbag wire harness.

b. Using a screwdriver, disengage the claw and remove the occupant classification ECU.

INSTALLATION

1. INSTALL OCCUPANT CLASSIFICATION ECU
a. Check that the power switch is off.
b. Check that the negative battery (-) cable is disconnected.

CAUTION: Wait for 90 seconds after disconnecting the cable to prevent airbag deployment.

c. Engage the claw.
d. Connect the connector and install the occupant classification ECU.

NOTE:
- When handling the airbag connector, take care not to damage the airbag wire harness.
- If the occupant classification ECU has been dropped, or there are any cracks, dents or other defects in the case or connector, replace the occupant classification ECU with a new one.
- When installing the occupant classification ECU, be careful that the SRS wiring does not interfere with other parts and that it is not pinched between other parts.

2. INSTALL FRONT SEAT ASSEMBLY RH (for Power Seat)

HINT: Use the same procedure for the RH side and the LH side.

3. INSTALL INNER SEAT TRACK BRACKET COVER RH (for Power Seat)

HINT: Use the same procedure for the RH side and the LH side.

4. INSTALL SEAT TRACK COVER RH (for Power Seat)

HINT: Use the same procedure for the RH side and the LH side.

5. INSTALL FRONT SEAT HEADREST ASSEMBLY (for Power Seat)
6. INSTALL FRONT SEAT ASSEMBLY RH (for Manual Seat)
7. INSTALL INNER SEAT TRACK BRACKET COVER RH (for Manual Seat)
8. INSTALL SEAT TRACK COVER RH (for Manual Seat)
9. INSTALL FRONT SEAT HEADREST ASSEMBLY (for Manual Seat)
10. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL (for Manual Seat)
11. PERFORM INITIALIZATION
a. Perform initialization.

NOTE: Some systems need initialization after reconnecting the cable to the negative battery terminal.

12. INSPECT SLIDE ADJUSTER LOCK (for Manual Seat)
13. INSPECT FRONT SEAT ASSEMBLY (for Power Seat)
14. PERFORM ZERO POINT CALIBRATION AND SENSITIVITY CHECK
a. Perform zero point calibration and sensitivity check.

15. INSPECT SRS WARNING LIGHT
a. Inspect the SRS warning light.