MTU 12 V 4000 L62FB Operating Instructions Manual page 113

520 – SD P-Intake Air after Filter A
Yellow alarm.
Associated parameter 1.0186.900
Cause
Intake air pressure sensor after
filter on A side defective, short
circuit or wire break.
522 – SD P-Intake Air after Filter B
Yellow alarm.
Associated parameter 1.0187.900
Cause
Intake air pressure sensor after
filter on B side defective, short
circuit or wire break.
531 – AL Wiring PWM_CM1
Red alarm.
Associated parameter 1.1044.900
Cause
Cable break or short circuit on
channel PWM_CM1.
532 – AL Wiring PWM1
Red alarm.
Associated parameter 1.1046.900
Cause
Wire break or short circuit on
channel PWM1.
533 – AL Wiring PWM2
Red alarm.
Associated parameter 1.1047.900
Cause
Wire break or short circuit on
channel PWM2.
Corrective action
u Check sensor and cabling (B81.1), replace if necessary. Fault is
rectified following engine restart.
Corrective action
u Check sensor and cabling (B81.2), replace if necessary. Fault is
rectified following engine restart.
Corrective action
u Check cabling to TecJet throttle, replace TecJet throttle if
necessary.
Corrective action
u Check wiring to mixture throttle on A side, replace mixture throttle
on A side if necessary.
Corrective action
u Check wiring to mixture throttle on B side, replace mixture throttle
on B side if necessary.
MS150098/02E 2016-11 | Troubleshooting | 113