Page 335 of 431
13B-335V9 MR-372-J84-13B450$152.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
*temp: temperature
*sens: sensor
PR671PARTICLE FILTER DOWNSTREAM TEMPERATURE SENS* VOLTAGE
PARAMETER
DEFINITIONThis parameter indicates the particle filter downstream temperature sensor voltage in
volts.
NOTESThis parameter exists only on certain F9Q816 engines with Vdiag48
Conformity check with engine stopped and ignition on, or engine running, and engine coolant temperature
> 80°C, without electrical consumers
PR671 ≈ 5 V
In the event of a fault, refer to the interpretation of fault DF309 Particle filter downstream temp* sensor circuit.
EDC16C36_V48_PR671/EDC16C36_V58_PR671
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16 C36
Program No.: 91
Vdiag No.: 48, 58
Page 336 of 431
13B-336V9 MR-372-J84-13B450$152.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
PR672DAMPER VALVE POSITION SETPOINT
PARAMETER
DEFINITIONThis parameter indicates the damper valve position setpoint as a %.
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, or engine running, and engine coolant temperature
> 80°C
PR672 < 5%
In the event of a fault, refer to the interpretation of fault DF226 Damper valve circuit.
EDC16C36_V44_PR672/EDC16C36_V4C_PR672 /EDC16C36_V48_PR672/EDC16C36_V50_PR672/EDC16C36_V54_PR672/
EDC16C36_V58_PR672
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58
Page 337 of 431
13B-337V9 MR-372-J84-13B450$152.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
PR747DAMPER VALVE POSITION
PARAMETER
DEFINITIONThis parameter indicates the damper valve position as a percentage.
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
When stopped PR747 = 0%
In the event of a fault, refer to the interpretation of fault DF226 Damper valve circuit.
Conformity check with engine running, engine coolant temperature > 80°C
At idle speed PR747 ≈ 5%
In the event of a fault, refer to the interpretation of fault DF226 Damper valve circuit.
EDC16C36_V44_PR747/EDC16C36_V4C_PR747/EDC16C36_V48_PR747/EDC16C36_V50_PR747/EDC16C36_V54_PR747/
EDC16C36_V58_PR747
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58
Page 338 of 431
13B-338V9 MR-372-J84-13B450$152.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
PR777RICHNESS RATIO SENSOR VOLTAGE
PARAMETER
DEFINITIONThis parameter indicates the richness ratio sensor voltage in volts.
NOTESSpecial notes:
This status only concerns certain F9Q818 engines. Check that the vehicle is definitely
equipped with a richness ratio sensor.
Conformity check with engine stopped and ignition on
PR777 = 0 ± 0.1 V
In the event of a fault, consult the interpretation of DF967 Richness ratio sensor circuit.
Conformity check with engine running, engine coolant temperature > 80°C
PR777=2±0.1V
In the event of a fault, consult the interpretation of DF967 Richness ratio sensor circuit.
EDC16C36_V44_PR777/EDC16C36_V48_PR777/EDC16C36_V4C_PR777
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16 C36
Program No.: 91
Vdiag No.: 44, 48, 4C
Page 339 of 431
13B-339V9 MR-372-J84-13B450$152.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
*temp: temperature
PR778RICHNESS RATIO SENSOR TEMP*
PARAMETER
DEFINITIONThis parameter indicates the richness ratio sensor temperature.
NOTESSpecial notes:
This status only concerns certain F9Q818 engines. Check that the vehicle is definitely
equipped with a richness ratio sensor.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant temperature
> 80°C
PR778 ≈ 780°C
In the event of a fault, refer to the interpretation of DF970 Richness ratio sensor heating circuit.
EDC16C36_V44_PR778/EDC16C36_V48_PR778/EDC16C36_V4C_PR778
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16 C36
Program No.: 91
Vdiag No.: 44, 48, 4C
Page 340 of 431
13B-340V9 MR-372-J84-13B450$152.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
PR779RATIO SENSOR RICHNESS
PARAMETER
DEFINITIONThis parameter indicates the ratio sensor richness.
NOTESSpecial notes:
This status only concerns certain F9Q818 engines. Check that the vehicle is correctly
fitted with a richness ratio sensor
Conformity check with engine stopped and ignition on
PR779 ≈ 1
In the event of a fault, refer to the interpretation of fault DF980 Richness ratio sensor function.
Conformity check with engine running, engine coolant temperature > 80°C
0.20 < PR779 < 0.40
In the event of a fault, refer to the interpretation of fault DF980 Richness ratio sensor function.
EDC16C36_V44_PR779/EDC16C36_V48_PR779/EDC16C36_V48_PR779
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16 C36
Program No.: 91
Vdiag No.: 44, 48, 4C
Page 341 of 431

13B-341V9 MR-372-J84-13B450$152.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
PR784
PR785
PR786
PR787
PR788
PR789
PR790
PR791
PR792
PR793DF312 RECORD NO. 1
DF312 RECORD NO. 2
DF312 RECORD NO. 3
DF312 RECORD NO. 4
DF312 RECORD NO. 5
DF312 RECORD NO. 6
DF312 RECORD NO. 7
DF312 RECORD NO. 8
DF312 RECORD NO. 9
DF312 RECORD NO. 10
PARAMETER
DEFINITIONThese parameters are shown in Km.
NOTESSpecial notes:
These parameters must only be interpreted for DF312 Speed request if it is present
or stored.
These parameters exist only in Vdiag48.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant temperature
> 80°C, without electrical consumers
In the event of a fault, consult the interpretation of fault DF312 Speed request.
These parameters are used for looking up the history of the last ten particle filter warning light activations
Each parameter from PR784 to PR793 contains a record of the vehicle mileage when the particle filter warning
light illuminates. The appearance of fault DF312 Speed request is associated with each of these parameters.
PR784 to PR793 operate through successive copying (when the particle filter warning light comes on, the value of
PR784 is copied to PR785, the value of PR785 is copied to PR786 and so on).
When there are more than ten records, the value of PR793 DF312 record no. 10 is cleared. The new mileage is
allocated to PR784.
If none of the parameters between PR784 and PR793 is available in the sub-function, this means that no data has
been saved. The parameters appear in the sub-function when they have a value above zero.
EDC16C36_V48_PR784/EDC16C36_V48_PR785/EDC16C36_V48_PR786/EDC16C36_V48_PR787/EDC16C36_V48_PR788/
EDC16C36_V48_PR789/EDC16C36_V48_PR790/EDC16C36_V48_PR791/EDC16C36_V48_PR792/EDC16C36_V48_PR793/
EDC16C36_V58_PR784/EDC16C36_V58_PR785/EDC16C36_V58_PR786/EDC16C36_V58_PR787/EDC16C36_V58_PR788/
EDC16C36_V58_PR789/EDC16C36_V58_PR790/EDC16C36_V58_PR791/EDC16C36_V58_PR792/EDC16C36_V58_PR793
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16 C36
Program No.: 91
Vdiag No.: 48, 58
Page 342 of 431

13B-342V9 MR-372-J84-13B450$152.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
PR794
PR795
PR796
PR797
PR798
PR799
PR800
PR801
PR802
PR803REGENERATION FAILURE RECORD NO. 1
REGENERATION FAILURE RECORD NO. 2
REGENERATION FAILURE RECORD NO. 3
REGENERATION FAILURE RECORD NO. 4
REGENERATION FAILURE RECORD NO. 5
REGENERATION FAILURE RECORD NO. 6
REGENERATION FAILURE RECORD NO. 7
REGENERATION FAILURE RECORD NO. 8
REGENERATION FAILURE RECORD NO. 9
REGENERATION FAILURE RECORD NO. 10
PARAMETER
DEFINITIONThese parameters are shown in Km.
NOTESSpecial notes:
For Vdiag48:
These parameters must only be interpreted for DF312 Speed request if it is present
or stored.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant temperature
> 80°C, without electrical consumers
These parameters are used so that the history of the last ten failed regenerations when driving is known.
Each parameter between PR794 and PR803 contains the vehicle mileage when particle filter regeneration fails
when driving. each parameter relates to an engine status. They are recorded simultaneously (for example PR797
Regeneration failure record No. 4 is associated with ET709 Engine status record no. 4).
PR794 to PR803 operate through successive copying (when regeneration fails whilst driving, the value of PR794
is copied to PR795, the value of PR795 is copied to PR796 and so on).
When there are more than ten records, the value of PR803 Regeneration failure record no. 10 is overwritten.
The new mileage is allocated to PR794.
If none of the parameters between PR794 and PR803 is available in the sub-function, this means that no data has
been saved. The parameters appear in the sub-function when they have a value above zero.
EDC16C36_V48_PR794/EDC16C36_V48_PR795/EDC16C36_V48_PR796/EDC16C36_V48_PR797/EDC16C36_V48_PR798/
EDC16C36_V48_PR799/EDC16C36_V48_PR800/EDC16C36_V48_PR801/EDC16C36_V48_PR802/EDC16C36_V48_PR803/
EDC16C36_V50_PR794/EDC16C36_V50_PR795/EDC16C36_V50_PR796/EDC16C36_V50_PR797/EDC16C36_V50_PR798/
EDC16C36_V50_PR799/EDC16C36_V50_PR800/EDC16C36_V50_PR801/EDC16C36_V50_PR802/EDC16C36_V50_PR803/
EDC16C36_V58_PR794/EDC16C36_V58_PR795/EDC16C36_V58_PR796/EDC16C36_V58_PR797/EDC16C36_V58_PR798/
EDC16C36_V58_PR799/EDC16C36_V58_PR800/EDC16C36_V58_PR801/EDC16C36_V58_PR802/EDC16C36_V58_PR803
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16 C36
Program No.: 91
Vdiag No.: 48, 50, 58