MARUTI SUZUKI Wagon R, Руководство пользователя

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1A-3 Engine General Information and Diagnosis: Bi-Fuel LPG model
• For some malfunctions, ECM adopts the 2 D/C
detecting logic to prevent erroneous detection. With
this logic, MIL is turned on when the malfunction is
detected in 2 consecutive driving cycles.
• When a malfunction is detected, engine and driving
conditions at that moment are stored in ECM memory
as freeze frame data.
For details, refer to description on “Freeze Frame
Data”: Bi-Fuel LPG model.
• ECM and DLC are connected through CAN line.
ECM some information can be checked via DLC (3)
by SUZUKI scan tool (2) or CAN generic scan tool.
Warm-Up Cycle
Warm-up cycle means that the coolant temperature has
risen by at least 22 °C (40 °F) from engine starting and
reaches a minimum temperature of at least 71 °C (160
°F).
Driving Cycle (D/C)
Driving cycle means a period which starts at engine
starting and ends at engine shut off.
2 Driving Cycle Detection Logic
The malfunction detected in the first driving cycle is
stored in ECM memory (in the form of pending DTC and
freeze frame data) but the MIL does not turn on at this
time. It turns on at the second detection of the same
malfunction in the next driving cycle.
Pending DTC
Pending DTC means a DTC detected and stored
temporarily at the first driving cycle of the 2 driving cycle
detection logic.
Freeze Frame Data
ECM stores the engine and driving conditions (in the
form of data as shown) at the moment of the detection of
a malfunction in its memory. This data is called “Freeze
frame data”.
It is possible to know engine and driving conditions (e.g.,
whether the engine was warm or not, where the vehicle
was running or stopped, where air / fuel mixture was
lean or rich) when a malfunction was detected by
checking the freeze frame data. Also, ECM has a
function to store each freeze frame data for three
different malfunctions in the order of their detection.
Utilizing this function, it is possible to know the order of
detection of these malfunctions. This is helpful when
rechecking or diagnosing a trouble.
For details of freeze frame data that can be read from
ECM, refer to the following table.
NOTE
• For freeze frame data with asterisk (*), it
indicates the ratio between power supply
voltage and output voltage of related
sensor.
When power supply voltage is 5.0 V and
output voltage of related sensor is 4.0 V,
freeze frame data is displayed the
following.
[A]: Without tachometer [B]: With tachometer
2
3
1
[A] [B]
1
I9R90A111001-03
DTC
Fuel System
Calculated Load
ECT
Short Term Fuel Trim
Long Term Fuel Trim
MAP
Engine Speed
Vehicle Speed
Ignition Advance
Intake Air Temperature
Absolute TP 1*
Evap Canist Prg Duty
Fuel Tank Level
Barometric Pres
Battery Voltage
Relative TP**
Type of Fuel
CNG/LPG Temperature
CNG/LPG Pressure