| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Vehicle Interior | Section: Supplemental Restraint Systems | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM0000015IJ009X |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
Trouble in Passenger Airbag ON/OFF Indicator |
DESCRIPTION
The occupant classification system detects the front passenger seat condition. It then informs a passenger of the front passenger airbag assembly and front seat side airbag assembly condition (activated/not activated) with the passenger airbag ON/OFF indicator.
HINT:
Approximately 6 seconds after the ignition switch is turned ON, the passenger airbag ON/OFF indicator will be on/off depending on the conditions listed below.
|
Front Passenger Seat Condition |
Passenger Airbag ON/OFF Indicator |
SRS Warning Light |
|
|
ON Indicator |
OFF Indicator |
||
|
Vacant |
OFF |
OFF |
OFF |
|
Adult is seated. |
ON |
OFF |
OFF |
|
Child is seated. |
OFF |
ON |
OFF |
|
Child restraint system is set. |
OFF |
ON |
OFF |
|
Occupant classification system failure |
OFF |
ON |
ON |
INSPECTION PROCEDURE
NOTICE:
After the ignition switch is turned off, the navigation system requires approximately 90 seconds to record various types of memory and settings. As a result, after turning the ignition switch off, wait 90 seconds or more before disconnecting the cable from the negative (-) battery terminal.
HINT:
When the indicator is malfunctioning, if the SRS warning light is off, follow the procedures below as a DTC is not output. If the SRS warning light is on, a DTC is output. Troubleshoot for the output DTC.
PROCEDURE
|
1. |
CHECK SRS WARNING LIGHT |
(a) Turn the ignition switch to ON, and check the SRS warning light condition.
HINT:
If this trouble occurs, the SRS warning light is off. If the light is on, a DTC is output. Troubleshoot for the output DTC.
OK:
After the primary check period, the SRS warning light goes off.
HINT:
The primary check is performed for approximately 6 seconds after the ignition switch is turned ON.
|
|
2. |
PERFORM ZERO POINT CALIBRATION |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON, and wait for at least 60 seconds.
(d) Using the Techstream, perform the zero point calibration
.
OK:
Zero point calibration is completed using the Techstream.
|
|
3. |
PERFORM SENSITIVITY CHECK |
(a) Using the Techstream, perform the sensitivity check
.
Standard range:
27 to 33 kg (59.5 to 72.8 lb)
|
|
5. |
RETIGHTEN FRONT SEAT ASSEMBLY RH BOLT |
(a) Turn the ignition switch off.
(b) Loosen the 4 installation bolts of the front seat assembly RH.
(c) Tighten the 4 installation bolts of the front seat assembly RH to the specified torque.
-
for Manual seat
-
for Power seat
Torque: 37 N·m (377 kgf·cm, 27 ft·lbf)
|
|
6. |
PERFORM ZERO POINT CALIBRATION |
(a) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON, and wait for at least 60 seconds.
(d) Using the Techstream, perform the zero point calibration
.
OK:
Zero point calibration is completed using the Techstream.
|
|
7. |
PERFORM SENSITIVITY CHECK |
(a) Using the Techstream, perform the sensitivity check
.
Standard range:
27 to 33 kg (59.5 to 72.8 lb)
|
|
9. |
READ VALUE USING TECHSTREAM (PASSENGER SIDE BUCKLE SWITCH) |
(a) Turn the ignition switch to ON, and wait for at least 60 seconds.
(b) Using the Techstream, read the Data List
.
(1) Read the display when the passenger side buckle switch is operated.
Occupant Detection
|
Tester Display |
Measure Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Passenger Buckle SW |
Passenger side buckle switch / Set, Unset or NG |
Unset: Passenger side seat belt is unfastened Set: Passenger side seat belt is fastened NG: Passenger side seat belt is malfunctioning |
- |
OK:
The Techstream display changed correctly according to the operation of buckle switch.
|
|
10. |
CHECK CONNECTOR |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
(c) Disconnect the connectors from the occupant classification ECU and the 4 occupant classification sensors.
(d) Check that the connectors (on the occupant classification ECU side and 4 occupant classification sensors side) are not damaged.
OK:
Connectors are not deformed or damaged.
|
|
11. |
REPLACE OCCUPANT CLASSIFICATION ECU |
(a) Replace the occupant classification ECU
.
|
|
12. |
PERFORM ZERO POINT CALIBRATION |
(a) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON, and wait for at least 60 seconds.
(d) Using the Techstream, perform the zero point calibration
.
OK:
Zero point calibration is completed using the Techstream.
|
|
13. |
PERFORM SENSITIVITY CHECK |
(a) Using the Techstream, perform the sensitivity check
.
Standard range:
27 to 33 kg (59.5 to 72.8 lb)
|
|
15. |
CHECK CONNECTOR |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Disconnect the connectors from the occupant classification ECU and front seat inner belt RH.
(d) Check that the connectors (on the occupant classification ECU side and front seat inner belt RH side) are not damaged.
OK:
Connectors are not deformed or damaged.
|
|
16. |
REPLACE FRONT SEAT INNER BELT ASSEMBLY RH |
(a) Replace the front seat inner belt RH
.
|
|
17. |
PERFORM ZERO POINT CALIBRATION |
(a) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON, and wait for at least 60 seconds.
(d) Using the Techstream, perform zero point calibration
.
OK:
Zero point calibration is completed using the Techstream.
|
|
18. |
PERFORM SENSITIVITY CHECK |
(a) Using the Techstream, perform the sensitivity check
.
Standard range:
27 to 33 kg (59.5 to 72.8 lb)
|
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