Toyota Corolla Cross: Load Sensor for Occupant Detection System Circuit Short to Battery (B179312)
DESCRIPTION
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
Warning Indicate | Test Mode / Check Mode |
|---|---|---|---|---|---|
|
B179312 | Load Sensor for Occupant Detection System Circuit Short to Battery |
When the detected voltage is higher than specified value before supplying power to the sensor. |
| Comes on |
Does not apply to test/check mode |
WIRING DIAGRAM
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CAUTION / NOTICE / HINT
NOTICE:
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.
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HINT:
- When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.
Click here
- If it is difficult to perform troubleshooting (wire harness inspection), remove the front passenger seat installation bolts to see under the seat cushion.
- In the above case, lift and hold the seat so that it does not fall down. Hold the seat only as necessary because holding the seat for a long period of time may cause seat rail deformation.
PROCEDURE
|
1. | CHECK CONNECTION OF CONNECTORS |
(a) Turn the ignition switch off.
(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) Check that the connectors are properly connected to the airbag ECU assembly, front occupant classification sensor LH and rear occupant classification sensor LH.
OK:
The connectors are properly connected.
| NG | .gif) | CONNECT CONNECTORS PROPERLY |
|
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| 2. |
CHECK CONNECTORS |
(a) Disconnect the connectors from the airbag ECU assembly, front occupant classification sensor LH and rear occupant classification sensor LH.
| (b) Check that the terminals of the connectors are not deformed or damaged. OK: The terminals of the connectors are not deformed or damaged. |
|
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| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. |
CHECK HARNESS AND CONNECTOR (AIRBAG ECU ASSEMBLY - FRONT OCCUPANT CLASSIFICATION SENSOR LH - REAR OCCUPANT CLASSIFICATION SENSOR LH) |
(a) Connect the cable to the negative (-) battery terminal.
(b) Turn the ignition switch to ON.
| (c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
Result:
|
|
(d) Turn the ignition switch off.
(e) 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.
| OK | | REPLACE AIRBAG ECU ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
