490 – HI ETC4 Overspeed
Cause
Corrective action
The speed of the LP turbocharger
on the B side measured at sensor
B44.4 has violated limit value 1.
The turbocharger speed is too
high. Cause: Fault or malfunction
of another turbocharger.
1. Reduce power.
2. Contact Service.
491 – SS ETC4 Overspeed
Cause
Corrective action
The speed of the LP turbocharger
on the B side measured at sensor
B44.4 has violated limit value 2.
The turbocharger speed is too
high. Cause: Fault or malfunction
of another turbocharger.
1. Reduce power.
2. Contact Service.
536 – AL Wiring PWM_CM1
Cause
Corrective action
The HP fuel control block M8.1 (A
side) of the HP fuel pump cannot
be activated.
1. Check engine wiring (→ Page 157).
2. Contact Service.
549 – AL Power Cut-Off detected
Cause
Corrective action
ECU operating voltage was
switched off while the engine was
running. Do not switch off the
power supply until the engine has
reached a standstill.
1. If the power supply was not disconnected manually, check the
2. Contact Service.
558 – AL Wiring PWM_CM2
Cause
Corrective action
The HP fuel control block M8.2 (B
side) of the HP fuel pump cannot
be activated.
1. Check engine wiring (→ Page 157).
2. Contact Service.
582 – AL Emergency Stop Failed
Cause
Corrective action
The alarm is raised if the engine
fails to reach a standstill after a
certain time following an
emergency stop signal.
u
Contact Service.
MS150100/06E 2017-08
| Troubleshooting | 79
TIM-ID: 0000064702 - 003
