Manufacturer Code Charts: 135600
The upper limit value of component B16/15 (Temperature sensor upstream of SCR catalytic converter) has been exceeded.
Possible cause:
- B16/15 (Temperature sensor upstream of SCR catalytic converter)
Affected functions:
- Power generation
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Test 1: Check component B16/15 (Temperature sensor upstream of SCR catalytic converter).
1. Check component B16/15 (Temperature sensor upstream of SCR catalytic converter).
Check actual value B16/15 (Temperature sensor upstream of SCR catalytic converter).
Figure legend
- B16/15 (Temperature sensor upstream of SCR catalytic converter)
- B16/15x1Plug connection B16/15 (Temperature sensor upstream of SCR catalytic converter)
Note
- If fault exists, vehicle continues operating with substitute value from the temperature model.
Important note
- The fault code is stored even if the lines to component B16/15 (Temperature sensor upstream of SCR catalytic converter) are interrupted.
Test prerequisite
- Run engine.
Status of the relevant actual values:
- Coolant temperature:Warning! Communication with ECU required.
- B16/15 (Temperature sensor upstream of SCR catalytic converter):Warning! Communication with ECU required.
Specified value
- The exhaust temperature rises when the engine is running.
- At a coolant temperature of approx. 80° C, the value is between 80° C and 180° C.
Question
- Is the actual value o.k.?
YES
The actual value is okay.Possible cause and remedy in the case of complaint
- Check lines from component B16/15 (Temperature sensor upstream of SCR catalytic converter) to component N3/9 (CDI control unit).
NO
Voltage supply of component B16/15 (Temperature sensor upstream of SCR catalytic converter)
Figure legend
- B16/15 (Temperature sensor upstream of SCR catalytic converter)
- B16/15x1Plug connection B16/15 (Temperature sensor upstream of SCR catalytic converter)
Special tool
- Adapter cable220 589 00 99 37
Test prerequisite
- The actual value is not o.k.
Test sequence
- Switch off ignition.
- Detach coupling at component B16/15 (Temperature sensor upstream of SCR catalytic converter).
- Connect adapter cable no. 220 589 00 99 37 to engine wiring harness B16/15 (Temperature sensor upstream of SCR catalytic converter).
- Measure direct voltage with multimeter between sockets (B16/15x1) 2 and (B16/15x1) 1
- Switch on ignition.
Specified value
- Voltage[4.75...5.25] V
Question
- Is the measurement value OK?
YES
Check internal resistance of component B16/15 (Temperature sensor upstream of SCR catalytic converter).
Figure legend
- B16/15 (Temperature sensor upstream of SCR catalytic converter)
- B16/15x1Plug connection B16/15 (Temperature sensor upstream of SCR catalytic converter)
Special tool
- Adapter cable220 589 00 99 37
Test prerequisite
- The measurement value is OK.
Test sequence
- Switch off ignition.
- Connect adapter cable no. 220 589 00 99 37 at component B16/15 (Temperature sensor upstream of SCR catalytic converter).
- Test resistance.
- Measure resistance with multimeter between pins (B16/15x1) 1 and (B16/15x1) 2
Specified values
- Resistor[20° C]: [210...230]ohms
- Resistor[100° C]: [265...285]ohms
- Resistor[200° C]: [338...358]ohms
- Resistor[300° C]: [409...429]ohms
- Resistor[400° C]: [477...497]ohms
- Resistor[500° C]: [543...563]ohms
- Resistor[600° C]: [607...627]ohms
- Resistor[700° C]: [668...688]ohms
- Resistor[800° C]: [727...747]ohms
- Resistor[900° C]: [747...759]ohms
- Resistor[1000° C]: [838...858]ohms
Question
- Are the measurement values OK?
YES
The measurement values are OK.Further procedure
- Inspect cables and plug connections between component B16/15 (Temperature sensor upstream of SCR catalytic converter) and control module N3/9 (CDI control unit) for loose contact, damage and corrosion, repair or replace if necessary.
End of test
NO
The measurement values are not OK.Possible cause and remedy
- Replace component B16/15 (Temperature sensor upstream of SCR catalytic converter).
Note
- After replacing component B16/15 (Temperature sensor upstream of SCR catalytic converter), the teach-in process for this component must be performed via menu 'Control unit adaptations'.
End of test
NO
The measurement value is not OK.Further procedure
- Inspect cables and plug connections between component B16/15 (Temperature sensor upstream of SCR catalytic converter) and control module N3/9 (CDI control unit) for loose contact, damage and corrosion, repair or replace if necessary.
End of test