Suzuki GRAND VITARA Owner's Manual page 60

1A-5 Engine General Information and Diagnosis:
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. (If malfunction as described in the upper square "1" 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".)
Priority
Freeze frame data at initial detection of malfunction among misfire detected (P0300 – P0304), fuel
1
system too lean (P0171) and fuel system too rich (P0172)
2 Freeze frame data when a malfunction other than those in "1" is detected
In the 2nd through the 4th frames, the freeze frame data of each malfunction is stored in the order as each malfunction
is detected. These data are not updated.
Shown in the table are examples of how freeze frame data are stored when two or more malfunctions are detected.
Malfunction detected order
No malfunction
P0401 (EGR)
1
detected
P0171 (Fuel system)
2
detected
P0300 (Misfire)
3
detected
P0301 (Misfire)
4
detected
Freeze frame data clearance:
The freeze frame data is cleared at the same time as
clearance of DTC.
Data Link Connector (DLC)
DLC (1) is in compliance with SAE J1962 in the shape of
connector and pin assignment.
OBD serial data line (3) (K line of ISO 9141) is used for
SUZUKI scan tool or OBD generic scan tool to
communicate with ECM, Air bag SDM, immobilizer
control module (in ECM), BCM (Body electrical Control
Module), TCM (Transmission Control Module (for A/T
model)) 4WD control module (for J20 engine) and ABS
hydraulic unit / control module assembly.
Freeze frame data in frame 1
Frame 1
Freeze frame data to
be updated
No freeze frame data
Data at P0401 Data at P0401
detection detection
Data at P0171 Data at P0401
detection detection
Data at P0171 Data at P0401
detection detection
Data at P0171 Data at P0401
detection detection
Frame
Frame 2
1st freeze frame 2nd freeze frame
data
Data at P0171
detection
Data at P0171
detection
Data at P0171
detection
2
16 15
8 7
1
2. B + (Unswitched vehicle battery positive)
4. ECM ground (Signal ground)
5. Vehicle body ground (Chassis ground)
Frame 3 Frame 4
3rd freeze frame
data data
— —
—
Data at P0300
detection
Data at P0300
detection
14 13 12 11 10 9
6 5 4 3 2 1
5
4
3
1
I5JB0A110004-01