Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 97
DME 7.8 DME 7.8 0 · Since the sensor behind the catalytic converter is n
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DME 7.8 DME 7.8 0
Note!
Since the sensor behind the catalytic converter is not included in the
closed-loop control, no value for the oxygen sensor is displayed.
$18 Oxygen sensor signal, bank 2, sensor 1
Output of oxygen sensor voltage and associated oxygen sensor.
Display of sensor voltage between 0 V and 1.275 V and of the oxy-
gen sensor in percent.
In the case of decimal output, conversion factor = 0.005 (voltage of
oxygen sensor)
Decimal value displayed multiplied by 0.005 gives the voltage of
oxygen sensor.
Oxygen sensor display:
Lean to -100 %
Rich to 99.22 %
In the case of decimal output, conversion factor = 0.78125
Offset = -100 %
Decimal value displayed multiplied by 0.78125 minus 100% gives
the HO2S integrator.
$19 Oxygen sensor signal, bank 2, sensor 2
Display of oxygen sensor voltage and associated oxygen sensor.
Display of sensor voltage between 0 V and 1.275 V and of the oxy-
gen sensor in percent.
In the case of decimal output, conversion factor = 0.005
Decimal value displayed multiplied by 0.005 gives the voltage of
oxygen sensor.
Note!
Since the sensor behind the catalytic converter is not included in the
closed-loop control, no value for the oxygen sensor is displayed.
$1C OBD requirements
Output of system classification.
Data output with a scan tool - 911 Carrera (996) 0-3.1 page 11
Printed in Germany – 8, 2002 dsc_FL78
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