P149C

191B01 - P149C

Information saved in
DME

Fault code
191B01 - P149C

Fault text
Tank safety valve shut-off valve, activation: Short circuit to
B+

Fault description
The diagnostic function monitors electrical activation of the
tank cutoff valve.

Condition for fault identification
Test condition:
The fault is recognized when the diagnostic fault code for
the sensor is logged on the PT CAN (OBD services
message) from the TFE1 ECU (ECU for tank's electronic
functions).
Potential problem source(s):
- Global LIN bus fault 'LIN bus communications: signal
missing' (InmLINBusBlk; 0x3B97)
- Defective fuse
- Defect in the LIN bus wire, ground wire or Terminal 30
wire (open wire, short to ground, short to UBatt)
- Corrosion on plug
- Electric water pump component fault
Terminal condition: Terminal 15
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- none

Condition for fault memory entry
This fault is logged in the ECU fault memory if it remains
present for longer than 45 sec.

Action in service
- If diagnostic fault code 'LIN bus communications: signal
missing' (InmLINBusBlk; 0x3B97) is logged, start by
repairing this problem, then clear the ECU fault memory,
switch on the ignition, then wait at least 1 minute before
checking to determine whether the fault has been logged
again
- Check pump plug (also for corrosion)
- Check power-supply voltage to Terminal 30 / Terminal 31
- If no voltage is present, check the fuse - If the fuse is
defective, replace it and check power supply for short and
open circuits
- Check the LIN wire for opens and shorts to UBatt and
ground
- Perform tester job, if not successful: Replace EWP electric
water pump

Fault effect and breakdown warning
Breakdown notice:
None
Possible apparent symptoms:
MIL comes on

Driver information
Warning light:
- ECE emissions warning lamp: on
- ECE electronic engine power reduction: on
- CC message: on
- US emissions warning lamp: off
- US electronic engine power reduction: off
- CC message: none

Service instruction
None