B1809 is outputted when there is any fault, open/short to ground, in optical fiber sensor circuit.
And it is outputted when the contact sensor maintains "ON" status for more than 10 sec due to damaged or pressed bumper.
Item | Conditions for setting DTC | Possible Cause | ||
DTC Strategy |
•
Monitoring power supply voltage | 1. Faulty optical fiber sensor | ||
Enable Conditions |
•
IG key "ON" | |||
Case1 | Threshold Value |
•
LED current control output is applied for more than 0.3V~0.7V(it is relevant to 5mA control output) 3sec continuous & maintains PD value less than 0.8~1.2V | ||
Diagnostic Time |
•
1sec | |||
Fail-safe |
•
Prohibit deployment | |||
Cancellation | Active DTC |
•
Restoring more than PD 3.5V & maintaining 3 continuous cycles(for 3sec) at IG key "ON"
•
Can be erased by GDS | ||
History DTC |
•
Can be erased by GDS | |||
Case2 | Threshold Value |
•
Contact sensor maintains "ON" status for more than 10sec | 1. Faulty contact sensor | |
Diagnostic Time |
•
100㎳ | |||
Fail-safe |
•
Operates by default mode (Contact sensor input = center) | |||
Cancellation | Active DTC |
•
Maintaining normal status of contact sensor for more than 3sec at IG key "ON"
•
Can be erased by GDS | ||
History DTC |
•
Can be erased by GDS | |||
