MTU 12 V 4000 L62FB Operating Instructions Manual page 81

1.4520.264 – Open Primary, Channel 19
Yellow alarm. Initiated by IC922.
Cause
Ignition energy was not
discharged.
1.4520.265 – Open Primary, Channel 20
Yellow alarm. Initiated by IC922.
Cause
Ignition energy was not
discharged.
1.4520.270 – Warn. Missing Ring Gear Signal
Yellow alarm. Initiated by IC922.
Cause
Crankshaft signal 182 teeth is
missing.
1.4520.271 – Warning Missing Reset Signal
Yellow alarm. Initiated by IC922.
Cause
Reset signal from crankshaft is
missing.
1.4520.272 – Warn. Missing Camshaft Signal
Yellow alarm. Initiated by IC922.
Cause
Missing camshaft signal for
ignition system.
1.4520.273 – SCR Fault Odd
Red alarm. Initiated by IC922.
Cause
Hardware not ready for operation.
1.4520.274 – SCR Fault Even
Red alarm. Initiated by IC922.
Cause
Hardware not ready for operation.
Corrective action
1. Check cabling to ignition coil.
2. Check ignition coils.
Corrective action
1. Check cabling to ignition coil.
2. Check ignition coils.
Corrective action
u Sensor B 13.2, check sensor, sensor distance and cabling, replace
as necessary.
Corrective action
u Sensor B 75, check sensor, sensor distance and cabling, replace as
necessary.
Corrective action
u Sensor B 1.2, check sensor, sensor distance and cabling, replace
as necessary.
Corrective action
u Restart ignition.
Corrective action
u Restart ignition.
MS150098/02E 2016-11 | Troubleshooting | 81