B1624 is outputted when the READ/WRITE error occurs inside AHS CM. This code means the failure of the PDT data IC, the communication failure, or the verification failure.
※ AHS CM saves a sensor signal on EEPROM, and the fire logic is determined by the PDT(Pedestrian Detection Table) inside AHS CM.
Item | Conditions for setting DTC | Possible Cause | |
DTC Strategy |
•
EEPROM monitoring | 1. EEPROM fail("FIRE" record cannot be saved) | |
Case1 | Enable Conditions |
•
Examining the initial system after IG key "ON"(3sec)
•
Entering the fire logic
•
IG key "OFF" | |
Threshold Value |
•
READ/WRITE error 10cycles in a row | ||
Fail Safe |
•
AHS operates normally | ||
Case2 | Enable Conditions |
•
Examining the initial system after IG key "ON"(3sec) | 1. Faulty PDT data IC inside AHS CM. |
Threshold Value |
•
Communication error 10cycles in a row
•
But, once for the time when entering the fire logic
•
Verification error 10cycles | ||
Fail Safe |
•
Prohibit the deployment | ||
Diagnostic Time |
•
When event occurs | ||
Cancellation | Active DTC |
•
No problem after IG key "ON" again
•
Cannot be erased by GDS | |
History DTC |
•
Can be erased by GDS | ||
