DTC B1638: Curtain Shield Airbag Sensor Initialization Error (LH) [09/2019 - 12/2021]: Description
The side collision sensor LH circuit (bus 1) consists of the airbag sensor assembly, door side airbag sensor LH and No. 2 side airbag sensor LH.
The door side airbag sensor LH and No. 2 side airbag sensor LH detect impacts to the vehicle and send signals to the airbag sensor assembly to determine if the airbags and pretensioners should be deployed.
DTC B1638 is stored when a malfunction is detected in the side collision sensor LH circuit (bus 1).
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Test Mode / Check Mode |
|---|---|---|---|---|
| B1638 | Curtain Shield Airbag Sensor Initialization Error (LH) |
|
|
Does not apply to test/check mode |
DTC DETECTION CONDITIONS:
| Vehicle Condition | |||||||
|---|---|---|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | Pattern 4 | Pattern 5 | Pattern 6 | ||
| Diagnosis Condition | Ignition switch ON | ◦ | ◦ | ◦ | ◦ | ◦ | ◦ |
| Malfunction Status | The airbag sensor assembly detects a line short in the side collision sensor LH circuit (bus 1) | ◦ | - | - | - | - | - |
| The airbag sensor assembly detects a short to ground in the side collision sensor LH circuit (bus 1) | - | ◦ | - | - | - | - | |
| The airbag sensor assembly detects a short to B+ in the side collision sensor LH circuit (bus 1) | - | - | ◦ | - | - | - | |
| The airbag sensor assembly detects an open in the side collision sensor LH circuit (bus 1) | - | - | - | ◦ | - | - | |
| No. 2 side airbag sensor LH malfunction | - | - | - | - | ◦ | - | |
| Airbag sensor assembly malfunction | - | - | - | - | - | ◦ | |
| Detection Time | - | - | - | - | - | - | |
| Number of Trips | 1 trip | 1 trip | 1 trip | 1 trip | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.