MTU 12V4000L32F Operating Instructions Manual page 78

112720 – HIHI T-Exhaust B10 (abs)
Red alarm. Initiated by EMU.
Cause
Exhaust gas temperature of this
cylinder is too high.
112923 – MD/SD T-Exhaust
Red alarm. Initiated by EMU.
Cause
Summary alarm (for details, refer
to the source alarm).
113200 – Communication Lost ECU
Red alarm. Initiated by EMU.
Cause
No communication with ECU on
CAN.
113601 – AL Gas Valve 1 feedback
Red alarm. Initiated by EMU.
Cause
Summary alarm, gas solenoid
valve 1 feedback does not
correspond with setpoint signal.
113602 – AL Gas Valve status (internal)
Red alarm. Initiated by EMU.
Cause
Wire break or short circuit at
channel TO1-OUT or TO2-OUT.
113603 – AL Gas Valve feedback (internal)
Red alarm. Initiated by EMU.
Cause
Gas solenoid valve 1 logic
feedback does not correspond
with setpoint signal.
78 | Troubleshooting | MS150104/03E 2017-09
Corrective action
1. Check emission values (→ Page 47).
2. Check ignition timing (→ Page 176).
3. Check valve drive (exhaust valves do not close).
Corrective action
u Summary alarm (for details, refer to the source alarm).
Corrective action
1. Check ECU supply voltage.
2. Check CAN connecting line.
Corrective action
1. Check valve 1 and cabling (→ Page 202).
2. Rectify cause of alarm.
Corrective action
u Check cabling and external diode and resistor circuitry
(→ Page 202).
Corrective action
u Check valve 1.