DTC 09/DTC 0A - Front Sensor Short to Ground

MALFUNCTION
DTC O9L: Front sensor 1 (left-hand), shorting to ground
DTC OAL: Front sensor 2 (right-hand), shorting to ground

DIAGNOSTIC PROCEDURE
1. Unscrew the steering wheel center pad (airbag module) and unplug the connector at the rear. Plug reference resistor 84 711 53 into the connector.
2. Unplug connector 58.
3. Use an ohmmeter to check the resistance of the lead between connector 58 and the front sensor.
4. For front sensor 1 (left-hand), Take a reading
- across pin 2 and ground
- across pin 1 and ground
5. For front sensor 2 (right-hand), Take a reading
- across pin 11 and ground
- across pin 12 and ground
If any reading is 5,700 ohms or lower, the fault could be in the wiring between connectors 58 and 57 or in the wiring between connector 57 and the front sensor - proceed to point 6.
If all readings are higher than 5,700 ohms - proceed to point 11.
6. Unplug connector 57.
7. Use an ohmmeter to check the resistance of the lead between connector 58 and the front sensor.
8. For front sensor 1 (left-hand), take a reading:
- across pin 1 and ground
- across pin 2 and ground
- across pins 1 and 4
- across pins 2 and 4
9. For front sensor 2 (right-hand), take a reading:
- across pin 11 and ground
- across pin 12 and ground
- across pins 11 and 10
- across pins 12 and 10
If any reading is 5,700 ohms or lower, the fault could be in the wiring between connectors 58 and 57.
Investigate the cause. Rectify the fault or change the wiring as necessary.
If all readings are higher than 5,700 ohms - proceed to point 10.
10. Take a reading across connector 57 and the front sensor:
- across pin 1 and ground
- across pin 3 and ground
- across pins 1 and 2
- across pins 3 and 2
If any reading is lower than 5,700 ohms, the fault is in the front sensor. Change the front sensor.
11. The fault could be in the wiring between connector 58 and the control module.
Investigate the cause. Rectify the fault or change the control module as necessary.
Before changing the control module, Programming and Relearning