300 OBD II
MULTIPLE ECU STATUS INFORMATION
When viewing multiple OBD II ECU diagnostic data parameters, the symbol “=” or “>”
before the parameter name indicates the parameter is being updated by multiple ECUs.
The “=” symbol indicates the displayed parameter value is being reported as the same
value by multiple ECUs. The “>” symbol indicates the displayed parameter value is not
being reported as the same value by multiple ECUs. If there is no symbol before the
parameter name, the parameter is being updated by a single ECU.
The following table lists the tolerances for the different parameters being labeled “=” or
“>”. Multiple parameters that are within the tolerances are reported as being the same.
Multiple parameters that are not within the tolerances are reported as being not the same.
Bx = Bank number
Sx = Sensor number
CHARACTER STATUS
= Indicates multiple controllers are reporting approximately
the same value for the parameter.
> Indicates multiple controllers are reporting different
values for the parameter.
PARAMETER TOLERANCE
Engine Load 1.96%
ECT 5 °C
ST FT 1/ ST FT 2 3.91 %
LT FT 1/ LT FT 2 3.91 %
Fuel Pressure 15 kPaG
MAP 5 kPa
Engine Spd 2.5 RPM
Vehicle Spd 5 kph
Ign. Timing 2.5°
IAT 5 °C
MAF 0.1 gm/s
TPS 1.96%
O2S Bx Sx 0.025 V
FT O2S Bx Sx 3.91%
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