DTC DETECTION LOGIC

DTC No. | Trouble diagnosis name | DTC detecting condition | Possible cause
B1017 B1020 B1021 | OCCUPANT SENS C/U [UNIT FAIL] | Trouble occurs in Occupant Classification System control unit |

- Disconnection of wiring harness
- Malfunction in Occupant Classification System control unit
- Replace air bag diagnosis sensor unit

DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAG RESULT
With CONSULT-III

1. Turn ignition switch ON.
2. Perform “AIR BAG” Self Diagnostic Result CONSULT-III.

Without CONSULT-III

1. Turn ignition switch ON.
2. Check the air bag warning lamp status. Refer to Air Bag Warning Lamp Diagnosis.

NOTE：
SRS will not enter diagnosis mode if no malfunction is detected in user mode.
Is malfunctioning part detected?
YES>>Refer to Diagnosis Procedure.
NO>>INSPECTION END