MARUTI SUZUKI Wagon R, Manual

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1A-5 Engine General Information and Diagnosis: Bi-Fuel LPG model
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 LPG control module memory (in the form of
pending DTC and freeze frame data) but the LPG
warning light 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
LPG control module 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 fuel was petrol or LPG, whether the engine
was warm or not, whether the vehicle was running or
stopped, whether air / fuel mixture was lean or rich)
when a malfunction was detected by checking the freeze
frame data. Also, LPG control module 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
LPG control module, refer to the following table.
Freeze frame data (for example)
2
3
1
IAR90A110029-01
DTC
ECT
Short Term Fuel Trim
Long Term Fuel Trim
MAP
Engine Speed
Vehicle Speed
Intake Air Temperature
Absolute TP 1
CNG/LPG Pressure
CNG/LPG Temperature
Fuel Tank Level
Fuel Select Mode
Fuel Running Status
Inj Pulse Width #1
Inj Pulse Width #2
Inj Pulse Width #3
Gas Inj Pulse Width #1
Gas Inj Pulse Width #2
Gas Inj Pulse Width #3
Ignition Switch
Fuel Select Switch
Fuel Change Relay1
Fuel Change Relay2
Fuel Change Relay3
Power Supply Relay
Power Supply Relay (Mon)
Shut Off V Tank
Shut Off V Tank (Mon)
Shut Off V Reg
Shut Off V Reg (Mon)
Battery Voltage
DTC
Short Term Fuel Trim
Long Term Fuel Trim
ECT
MAP
Engine Speed
Function View System Bar Help
CNG / LPG / Freeze Frame Data
P0182 Fuel Temperature Sensor “A” Circuit
Parameter
Vehicle Speed
Value Unit
P0182
25
0.00
102 kPa
rpm
0
0
km/h
Exit
DTC
Data
List
View
Active
Test
Utility
%
%
C
0.00
Intake Air Temperature 26 C
Absolute TP 1 % 0.00
Low
IAR90A110030-01