Siemens LMV5 Series Technical Instructions page 262

Error Diag.
Device Display
Code Code
Unplaus Value
23 Ri 02 Measuring
Cell
Response Time
O2
24
Measuring Cell
too long
O2 Sensor Test
25 aborted by O2
AB PLL5..
Module
30
31
32
33
34 Internal Fault O2
Module
38
3E
3F
Any #
B0 01
Internal Fault
LMV5..
Basic Unit
02
B1 01
Section 7
Meaning for the LMV5x System
Fault with 02 Module (PLL5..) or Oxygen Sensor (QGO2..)
Measured internal resistance of the QGO measuring cell
is smaller than 5 Ohm or greater than 150 Ohm
Measured response time of the QGO measuring cell
exceeds 5 seconds
(completely electronic)
Fault occurred during O2 sensor test
CAN fault
CRC fault of a parameter page
Page too long open
Page disrupted
Invalid access to parameters
Fault during copying of a parameter page
External plausibility fault. This type of fault covers possible
faults occurring due to invalid presettings in the drive
commands. In response, the presettings will be ignored.
Internal plausibility fault. This type of fault covers possible
errors that cannot practically occur.
Fault with Base Unit (LMV5)
Fault during test of port outputs
Fault when resetting the set outputs
Fault during ZR test
Fault during short-circuit test between inputs and outputs
1) Check the wiring between the O2 Module and the O2
sensor.
2) O2 Sensor may have reached the end of its service
life (check resistance through AZL - QGO Resistance ).
If greater than 140 - 150 ohms, replace sensor.
1) Check mounting position / orientation of O2 sensor.
2) Check to see if O2 sensor is dirty. Do not blow out
with compresed air when hot! Cool, then blow out with
low pressure compressed air (less than 10 psi)
3) O2 Sensor may have reached the end of its service
life (check resistance through AZL - QGO Resistance ).
If greater than 140 -150 ohms, replace sensor.
Check (through the AZL - Normal Operation ) to see if
the measured O2 value is fluctuating.
1) If fault occurs sporadically, reduce electrical noise.
2) If fault occurs constantly, replace PLL5..
1) Reset the LMV5
2) If fault occurred after changing a parameter, check
the parameters that were last changed.
3) If fault cannot be rectified by the reset: Restore
parameters from the AZL to the LMV5
4) Replace the LMV5
1) If fault occurs sporadically, reduce electrical noise.
2) If fault occurs constantly, replace PLL5..
1) If fault occurs sporadically, reduce electrical noise.
2) If fault occurs continuously, replace LMV5.
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Corrective Action
SCC Inc.