Toyota Corolla Cross: Trouble in Passenger Airbag ON/OFF Indicator
DESCRIPTION
The occupant classification system detects the front passenger seat condition. It then displays the instrument panel passenger without door airbag assembly and front seat cushion spring sub-assembly RH condition (activated/not activated) using the passenger airbag ON/OFF indicator.
HINT:
Approximately 6 seconds after the ignition switch is turned to ON, the passenger airbag ON/OFF indicator will indicate ON/OFF depending on the following conditions.
|
Front Passenger Seat Condition |
Passenger Airbag ON/OFF Indicator |
SRS Warning Light | |
|---|---|---|---|
|
ON Indicator | OFF Indicator | ||
|
Vacant | OFF |
ON | OFF |
|
Adult*1 is seated | ON |
OFF | OFF |
|
Child*2 is seated | ON or OFF*2 |
OFF or ON*2 | OFF |
|
Child restraint system is installed |
OFF | ON |
OFF |
| Occupant classification system failure |
OFF | ON |
ON |
- *1: The system judges a person of average adult weight or more as an adult. If a smaller adult sits in the front passenger seat, the system may not recognize them as an adult depending on their physique and posture.
- *2: The system may not recognize a child or a child in a child restraint system as a child depending on factors such as the positioning of the child restraint system or the child's physique or posture.
CAUTION / NOTICE / HINT
NOTICE:
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.
Click here .gif)
HINT:
When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.
Click here
PROCEDURE
| 1. |
CHECK SRS WARNING LIGHT |
(a) Turn the ignition switch to ON, and check the SRS warning light condition.
OK:
After the primary check period, the SRS warning light turns off.
HINT:
The primary check is performed for approximately 6 seconds after the ignition switch is turned to ON.
| NG | .gif) | GO TO AIRBAG SYSTEM |
|
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| 2. |
PERFORM ZERO POINT CALIBRATION |
(a) Using the GTS, perform Occupant Detection Sensor Zero Point Calibration.
Click here
|
| 3. |
CHECK PASSENGER AIRBAG ON/OFF INDICATOR |
(a) Check the passenger airbag ON/OFF indicator operation.
Click here
OK:
Passenger airbag ON/OFF indicator operates normally.
| OK | | END (NORMAL AFTER PERFORMING ZERO POINT CALIBRATION) |
|
| 4. |
RETIGHTEN FRONT SEAT ASSEMBLY RH BOLT |
(a) Loosen the 4 installation bolts of the front seat assembly RH.
Click here
(b) Tighten the 4 installation bolts of the front seat assembly RH to the specified torque.
Click here
|
| 5. |
PERFORM ZERO POINT CALIBRATION |
(a) Using the GTS, perform Occupant Detection Sensor Zero Point Calibration.
Click here
|
| 6. |
CHECK PASSENGER AIRBAG ON/OFF INDICATOR |
(a) Check the passenger airbag ON/OFF indicator operation.
Click here
OK:
Passenger airbag ON/OFF indicator operates normally.
| OK | | END (THE 4 INSTALLATION BOLTS WAS LOOSEN) |
|
| 7. |
READ VALUE USING GTS |
(a) Read the Data List according to the display on the GTS.
Body Electrical > SRS Airbag > Data List|
Tester Display | Measurement Item |
Range | Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Judgment Result for Occupant Detection System (Buckle Switch of Passenger Seat) |
Front passenger side buckle switch |
Unknown, Buckle, Unbuckle or Malfunction |
Buckle: Front passenger seat belt is fastened Unbuckle: Front passenger seat belt is not fastened Malfunction: Front passenger seat belt is malfunctioning |
- |
|
Tester Display |
|---|
| Judgment Result for Occupant Detection System (Buckle Switch of Passenger Seat) |
OK:
The GTS display changes correctly in accordance with the operation of the front passenger side buckle switch.
| NG | | GO TO STEP 11 |
|
| 8. |
CHECK CONNECTORS |
| (a) Turn the ignition switch off. |
|
.png)
(b) Disconnect the cable from the negative (-) battery terminal.
CAUTION:
Wait at least 60 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
(c) Disconnect the connectors from the airbag ECU assembly, front occupant classification sensor LH and rear occupant classification sensor LH.
(d) Check that the terminals of the connectors are not deformed or damaged.
OK:
The terminals are not deformed or damaged.
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 9. |
REPLACE AIRBAG ECU ASSEMBLY |
(a) Connect the connectors to the front occupant classification sensor LH and rear occupant classification sensor LH.
(b) Replace the airbag ECU assembly with a new one.
Click here
(c) Connect the cable to the negative (-) battery terminal.
|
| 10. |
PERFORM ZERO POINT CALIBRATION |
(a) Using the GTS, perform Occupant Detection Sensor Zero Point Calibration.
Click here
| NEXT | | END (AIRBAG SENSOR ASSEMBLY WAS DEFECTIVE) |
| 11. |
CHECK CONNECTORS |
| (a) Turn the ignition switch off. |
|
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(b) Disconnect the cable from the negative (-) battery terminal.
CAUTION:
Wait at least 60 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
(c) Disconnect the connectors from the airbag ECU assembly and front seat inner belt assembly RH.
(d) Check that the terminals of the connectors are not deformed or damaged.
OK:
The terminals are not deformed or damaged.
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 12. |
REPLACE FRONT SEAT INNER BELT ASSEMBLY RH |
(a) Connect the connector to the airbag ECU assembly.
(b) Replace the front seat inner belt assembly RH with a new one.
Click here
(c) Connect the cable to the negative (-) battery terminal.
|
| 13. |
PERFORM ZERO POINT CALIBRATION |
(a) Using the GTS, perform Occupant Detection Sensor Zero Point Calibration.
Click here
| NEXT | | END (FRONT SEAT INNER BELT ASSEMBLY RH WAS DEFECTIVE) |
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