Page 241 of 329

13B-241
MR-372-J84-13B050$780.mif
V17
DIESEL INJECTION
Fault finding – Interpretation of parameters
Siemens Injection
SID301 and 304
Vdiag No.: 44-45-48-49-4D-4C
Program No.: B1 and B2
13B
PR634
AIR FLOW REQUEST
PARAMETER
DEFINITIONThis parameter indicates the air flow request in mg/st.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system
operation programming.
Conformity check with engine stopped and ignition on.
0 mg/st
Air flow estimated by the injection computer.
In the event of a fault, consult the interpretation of fault DF056 Air flow sensor circuit.
Conformity check with engine running, engine coolant temperature > 80°C
220 mg/st
Air flow estimated by the injection computer.
In the event of a fault, consult the interpretation of fault DF056 Air flow sensor circuit.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
SID301_V44_PR634/SID304_V45_PR634/SID301_V48_PR634/SID304_V49_PR634/SID304_V4D_PR634/SID301_V4C_PR634
Page 242 of 329

13B-242
MR-372-J84-13B050$780.mif
V17
DIESEL INJECTION
Fault finding – Interpretation of parameters
Siemens Injection
SID301 and 304
Vdiag No.: 44-45-48-49-4D-4C
Program No.: B1 and B2
13B
PR667
TURBINE UPSTREAM TEMPERATURE
PARAMETER
DEFINITIONThis parameter indicates the turbine upstream temperature in °C.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system
operation programming.
Conformity check with the engine stopped and the ignition on, or the engine running and the engine
coolant temperature > 80°C
The turbine upstream temperature sensor only measures temperatures above 100°C.
Measure the resistance of the turbine upstream temperature sensor, component code 1589 between
connections 3B and 3JQ.
Replace the sensor if the resistance is not:
303 kΩ at 200°C
5910Ω ±5930Ω at 300°C
1760Ω ±1780Ω at 400°C353Ω ± 373Ω at 600°C
187Ω ± 227Ω at 700°C
106Ω ± 156Ω at 800°C
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
SID304_V4D_PR667/SID304_V45_PR667/SID304_V49_PR667/SID301_V4C_PR667
Page 243 of 329
13B-243
MR-372-J84-13B050$780.mif
V17
DIESEL INJECTION
Fault finding – Interpretation of parameters
Siemens Injection
SID301 and 304
Vdiag No.: 44-45-48-49-4D-4C
Program No.: B1 and B2
13B
PR668
TURBINE UPSTREAM TEMPERATURE SENSOR VOLTAGE
PARAMETER
DEFINITIONThis parameter indicates the turbine upstream temperature sensor voltage in volts.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system
operation programming.
Conformity check with the engine stopped and the ignition on, or the engine running and the engine
coolant temperature > 80°C
0.3 V ≤ PR668 ≤ 5 V
In the event of a fault, refer to the interpretation of fault DF652 Turbine upstream temperature sensor circuit.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
SID304_V4D_PR668/SID304_V45_PR668/SID304_V49_PR668/SID301_V4C_PR668
Page 244 of 329

13B-244
MR-372-J84-13B050$780.mif
V17
DIESEL INJECTION
Fault finding – Interpretation of parameters
Siemens Injection
SID301 and 304
Vdiag No.: 44-45-48-49-4D-4C
Program No.: B1 and B2
13B
*sens: sensor
*Circ: circuit
*diff: differential
*Press: PressurePR669
PARTICLE FILTER DIFF* PRESS* SENS* VOLTAGE
PARAMETER
DEFINITIONThis parameter indicates the voltage of the particle filter differential pressure sensor in
volts.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system
operation programming.
Conformity check with the engine stopped and the ignition on, or the engine running and the engine
coolant temperature > 80°C
PR669 ≈5V
In the event of a fault, consult the interpretation of DF1003 Particle filter differential pressure sensor circuit.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
SID304_V4D_PR669/SID304_V45_PR669/SID304_V49_PR669/SID301_V4C_PR669
Page 245 of 329

13B-245
MR-372-J84-13B050$780.mif
V17
DIESEL INJECTION
Fault finding – Interpretation of parameters
Siemens Injection
SID301 and 304
Vdiag No.: 44-45-48-49-4D-4C
Program No.: B1 and B2
13B
*temp: temperature
*sens: sensorPR670
VOLTAGE OF PARTICLE FILTER UPSTREAM OF TEMP* SENS*
PARAMETER
DEFINITIONThis parameter indicates the particle filter upstream temperature sensor voltage in
volts.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system
operation programming.
Conformity check with the engine stopped and the ignition on, or the engine running and the engine
coolant temperature > 80°C
0.7 V ≤PR670 ≤5V
In the event of a fault, refer to the interpretation of fault DF1000 Particle filter upstream temperature sensor
circuit.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
SID304_V4D_PR670/SID304_V45_PR670/SID304_V49_PR670/SID301_V4C_PR670
Page 246 of 329

13B-246
MR-372-J84-13B050$780.mif
V17
DIESEL INJECTION
Fault finding – Interpretation of parameters
Siemens Injection
SID301 and 304
Vdiag No.: 44-45-48-49-4D-4C
Program No.: B1 and B2
13B
*temp: temperature
*sens: sensorPR671
PARTICLE FILTER DOWNSTREAM TEMPERATURE SENS*
VOLTAGE
PARAMETER
DEFINITIONThis parameter indicates the particle filter downstream temperature sensor voltage in
volts.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system
operation programming.
Conformity check with the engine stopped and the ignition on, or the engine running and the engine
coolant temperature > 80°C
0.7 V ≤PR671 ≤5V
In the event of a fault, refer to the interpretation of fault DF999 Particle filter downstream temperature sensor
circuit.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
SID304_V4D_PR671/SID304_V45_PR671/SID304_V49_PR671/SID301_V4C_PR671
Page 250 of 329

13B-250
MR-372-J84-13B050$780.mif
V17
DIESEL INJECTION
Fault finding – Interpretation of parameters
Siemens Injection
SID301 and 304
Vdiag No.: 44-45-48-49-4D-4C
Program No.: B1 and B2
13B
PR810
CATALYTIC CONVERTER 1 DOWNSTREAM TEMPERATURE
PARAMETER
DEFINITIONThis parameter indicates the catalytic converter 1 downstream temperature in °C.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system
operation programming.
Conformity check with the engine stopped and the ignition on, or engine running, and engine coolant
temperature > 80°C
This parameter indicates the temperature downstream of catalytic converter 1 using the temperature sensor
located before the oxidation catalytic converter.
This temperature changes depending on the status of the vehicle (hot or cold).
The temperature is given in °C.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
SID304_V4D_PR810/SID304_V45_PR810/SID304_V49_PR810/SID301_V4C_PR810
Page 251 of 329

13B-251
MR-372-J84-13B050$780.mif
V17
DIESEL INJECTION
Fault finding – Interpretation of parameters
Siemens Injection
SID301 and 304
Vdiag No.: 44-45-48-49-4D-4C
Program No.: B1 and B2
13B
PR812
CATALYTIC CONVERTER 1 TEMPERATURE SENSOR VOLTAGE
PARAMETER
DEFINITIONThis parameter indicates the catalytic converter 1 temperature sensor voltage in volts.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system
operation programming.
Conformity check with the engine stopped and the ignition on, or the engine running and the engine
coolant temperature > 80°C
0.7 V ≤PR812 ≤5V
In the event of a fault, consult the interpretation of fault DF1007 Catalytic converter 1 downstream temperature
sensor circuit or DF1009 Catalytic converter 1 downstream temperature regulation.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
SID304_V4D_PR812/SID304_V45_PR812/SID304_V49_PR812/SID301_V4C_PR812