635 – SD Air Humidity (HDT2800)
Cause
Corrective action
The signal from the humidity
sensor (B90) is missing.
u
Contact Service.
636 – SD Level Lube Oil J1939
Cause
Corrective action
The level signal from the
combined oil temperature and
level sensor (B93) is faulty or
missing.
1. Check engine wiring (→ Page 157).
2. Contact Service.
637 – SD T-Lube Oil Pan J1939
Cause
Corrective action
The temperature signal from the
combined oil temperature and
level sensor (B93) is faulty or
missing.
1. Check engine wiring (→ Page 157).
2. Contact Service.
647 – SD P-Exhaust Lambda
Cause
Corrective action
The signal from the exhaust gas
pressure sensor (B91.3) is faulty
or missing.
1. Check engine wiring (→ Page 157).
2. Contact Service.
693 – AL MB Valve error
Cause
Corrective action
The exhaust brake on the A side
Y57B / MB57B cannot be
activated.
u
Contact Service.
727 – AL L1 Delta T-LT Intercooler
Cause
Corrective action
The differential temperature
measured at sensors B26.and
B90.has violated limit value 1. The
LT coolant inlet temperature is
too high in relation to the ambient
air temperature.
1. Check cooler for dirt (plant).
2. Check fan operation (plant).
3. Contact Service.
82 | Troubleshooting | MS150100/06E 2017-08
TIM-ID: 0000064702 - 003
