Suzuki 2006 SX4, Service Manual

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1A-6 Engine General Information and Diagnosis:
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”.
Therefore, 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 as the malfunction is
detected. Utilizing this function, it is possible to know the
order of malfunctions that have been detected. Its use is
helpful when rechecking or diagnosing a trouble.
Freeze flame data (for example)
Priority of freeze frame data
ECM has 4 frames where the freeze frame data can be stored. The first frame stores the freeze frame data of the
malfunction which was detected first. However, the freeze frame data stored in this frame is updated according to the
priority described below. (If malfunction as described in the upper square “1” below is detected while the freeze frame
data in the lower square “2” has been stored, the freeze frame data “2” will be updated by the freeze frame data “1”.)
In the 2nd through the 4th frames, the freeze frame data of each malfunction is stored in the order as the malfunction
is detected. These data are not updated.
Shown in the table below are examples of how freeze frame data are stored when two or more malfunctions are
detected.
—: No freeze frame data
Freeze frame data clearance
The freeze frame data is cleared at the same time as clearance of DTC or Pending DTC.
Non-Euro-OBD Model
ECM diagnosis troubles which may occur in the area
including the following parts when the ignition switch is
ON and the engine is running, and indicates the result by
turning on malfunction indicator lamp (MIL) (1).
• Heated oxygen sensor
• A/F sensor
• ECT sensor
• TP sensor
• MAF sensor
• IAT sensor
I5RW0C110028-03
Priority Freeze frame data in frame 1
1
Freeze frame data at initial detection of malfunction among misfire detected (P0300 – P0304),
fuel system too lean (P0171) and fuel system too rich (P0172)
2 Freeze frame data when a malfunction other than those in “1” above is detected.
Frame Frame 1 Frame 2 Frame 3 Frame 4
Malfunction detection order
Freeze frame
data
1st freeze frame
data
2nd freeze frame
data
3rd freeze frame
data
1 No malfunction detected — — — —
2 P0116 (Pending DTC) P0116 data P0116 data — —
3 No malfunction detected P0116 data P0116 data — —
4 No malfunction detected — — — —
5 P0111 (Pending DTC) P0111 data P0111 data — —
6
P0111
P0116 (Pending DTC)
P0111 data P0111 data P0116 data —
7 P0300 (Pending DTC) P0300 data P0111 data P0116 data P0300 data
8 P0300 P0300 data P0111 data P0300 data —