766 – AL EASF A to B Open
ZKP-Number: 1.2510.127
Emergency-air shutoff flap A closed, but emergency-air shutoff flap B remained open
Cause
Corrective action
Flap B stuck.
Flap B was not energized.
Short circuit or wire break.
u
Check flap B (→ Page 140).
Check wiring (→ Page 181).
Contact Service.
767 – AL EASF Closed
ZKP-Number: 1.2510.129
Emergency-air shutoff flaps A and B closed
Cause
Corrective action
Status indication only.
u
Check alarms 763, 764, 765, 766 and take any necessary
action.
778 – AL EASF Not Closed
ZKP-Number: 1.2510.131
Emergency-air shutoff flaps A and B not closed
Cause
Corrective action
Flaps A and B stuck.
Flaps A and B were not
energized.
Short circuit or wire break.
1. Check flap B (→ Page 140).
2. Check wiring (→ Page 181).
3. Contact Service.
833 – AL Emission Warning
ZKP-Number: 2.1600.008
Emission warning
Yellow alarm - warning
Cause
Corrective action
NOx regulator not active.
Lambda regulator not active.
Charge-air regulator not active.
Lambda regulator at stop.
Charge-air pressure regulator at
stop.
NOx regulator at stop.
1. Delete all other fault codes (→ Page 181).
2. Check Lambda sensor and wiring (→ Page 181).
3. Check charge-air pressure sensor and wiring (→ Page 181).
4. Check NOx sensor and wiring (→ Page 181).
5. Check turbine bypass, EGR and dispenser cylinder flaps
(→ Page 143).
6. Contact Service.
MS150096/01E 2012-08 | Troubleshooting | 105
TIM-ID: 0000029153 - 006
