MTU 8 V 4000 Lx2 xx Operating Instructions Manual page 80

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 speed 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.
80 | Troubleshooting | MS150114/01E 2015-03
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 13.3, 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.