Suzuki Grand Vitara JB416 / JB420 (ESP model). Manual — part 2
1A-4 Engine General Information and Diagnosis:
Freeze Frame Data (Vehicle Not Equipped with
Diagnosis Connector)
ECM stores the engine and driving conditions (in the
form of data as shown in the figure) 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 each 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.
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”.)
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.
Freeze frame data clearance:
The freeze frame data is cleared at the same time as clearance of DTC.
[A]: 1st or 2nd in parentheses here represents which position in the order
the malfunction is detected.
[A]
I3RB0A110002-01
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” is detected
Malfunction detected order
Frame
Frame 1
Frame 2
Frame 3
Frame 4
Freeze frame data to
be updated
1st freeze frame
data
2nd freeze frame
data
3rd freeze frame
data
No malfunction
No freeze frame data
1
P0401 (EGR)
detected
Data at P0401
detection
Data at P0401
detection
—
—
2
P0171 (Fuel system)
detected
Data at P0171
detection
Data at P0401
detection
Data at P0171
detection
—
3
P0300 (Misfire)
detected
Data at P0171
detection
Data at P0401
detection
Data at P0171
detection
Data at P0300
detection
4
P0301 (Misfire)
detected
Data at P0171
detection
Data at P0401
detection
Data at P0171
detection
Data at P0300
detection
Engine General Information and Diagnosis: 1A-5
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 (if equipped) and ABS /
ESP
® control module.
Engine and Emission Control System Description
S5JB0E1101004
The engine and emission control system is divided into 4 major sub-systems: air intake system, fuel delivery system,
electronic control system and emission control system.
Air intake system includes air cleaner, throttle body, and intake manifold.
Fuel delivery system includes fuel pump, delivery pipe, etc.
Electronic control system includes ECM, various sensors and controlled devices.
Emission control system includes EGR, EVAP and PCV system.
CAN Communication System Description
S5JB0E1101005
ECM (1), ABS / ESP
® control module (2), TCM (for A/T model) (3), BCM (4), 4WD control module (if equipped) (5),
combination meter (6), keyless start control module (if equipped) (7) and steering angle sensor (for vehicle with
ESP
®) (8) of this vehicle communicate control data between each control module.
Communication of each control module is established by CAN (Controller Area Network) communication system.
2. B + (Unswitched vehicle battery positive)
4. ECM ground (Signal ground)
5. Vehicle body ground (Chassis ground)
2
3
4
5
1
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
1
I5JB0A110004-01
1
3
4
5
7
8
2
6
I6JB01110110-02
1A-6 Engine General Information and Diagnosis:
CAN communication system uses the serial communication in which data is transmitted at a high speed. It uses a
twisted pair of two communication lines for the high-speed data transmission. As one of its characteristics, multiple
control modules can communicate simultaneously. In addition, it has a function to detect a communication error
automatically. Each module reads necessary data from the received data and transmits data. ECM communicates
control data with each control module as follows.
ECM Transmission Data
NOTE
In communication between ECM and combination meter, between ECM and keyless start control
module (if equipped) and between ECM and 4WD control module (if equipped), data is transmitted only
from ECM to combination meter, keyless start control module (if equipped) and 4WD control module (if
equipped). (Combination meter, keyless start control module (if equipped) and 4WD control module (if
equipped) does not transmit data to ECM.)
Engine torque signal
Accelerator pedal position
Engine speed
Throttle position
Stand by to engage air
conditioning compressor
Top gear inhibit
Torque converter clutch
control inhibit
Lock up / slip control
inhibit signal
Immobilizer indication
Engine emissions
related malfunction
Engine coolant
temperature
Fuel level percent
Cruise control signal
(if equipped)
Cruise control system
indication (if equipped)
Vehicle speed
Brake pedal switch
active
Air conditioning compressor
clutch engaged
(if equipped with A/C)
A/C refrigerant pressure
Distance kilometers per
liter of fuel
Engine diagnostic trouble
codes (if equipped with
diagnosis connector)
TCM
(for A/T
model)
BCM
4WD control
module
(if equipped)
Combination
meter
Keyless start
control module
(if equipped)
ABS hydrauric
unit/control
module assembly
(for vehicle
without ESP )
Transmit data of ECM
ESP
control module
(for vehicle
with ESP )
R
R
R
I5JB0D110001-02
Engine General Information and Diagnosis: 1A-7
ECM Reception Data
Electronic Control System Description
S5JB0E1101011
The electronic control system consists of 1) various sensors which detect the state of engine and driving conditions, 2)
ECM which controls various devices according to the signals from the sensors and 3) various controlled devices.
Functionally, it is divided into the following sub systems:
• Fuel injection control system
• Ignition control system
• Intake manifold tuning valve control system (for J20 engine)
• Electric Throttle Body Control System
• Fuel pump control system
• Radiator cooling fan control system
• Evaporative emission control system (if equipped)
• EGR system
• A/F sensor heater control system (if equipped)
• Oxygen sensor heater control system (if equipped)
• A/C control system (if equipped with A/C)
• Camshaft position control system (for M16 engine)
• Immobilizer control system (if equipped)
• Generator control system (for J20 engine)
• Controller (computer) communication system
Especially, ECM (Engine Control Module), BCM (Body electrical Control Module), combination meter, TCM
(Transmission Control Module (For A/T model)), ABS / ESP
® control module, 4WD control module (if equipped),
keyless start control module (if equipped) and steering angle sensor (for vehicle with ESP
®) intercommunicate by
means of CAN (Controller Area Network) communication.
TCM
(for A/T model)
BCM
Torque reduction request
Slip control signal
Transmission malfunction
indication on
Transmission emissions related
malfunction active
Transmission gear selector
position
Daytime running light active
(if equipped with DRL)
Air conditioning switch ON
(if equipped with A/C)
A/T mode status
Electric load active (low beam)
Electric load active (high beam)
Electric load active (tail light)
Electric load active (rear defogger)
Blower fan step
Torque up request
Wheel speed pulse (rear right)
Wheel speed pulse (rear left)
Electronic stability program
system active
Electronic stability program
system off
Antilock brake system active
ABS hydraulic
unit/control module
assmbly (for vehicle
without ESP )
Receives data of ECM
ESP
control module
(for vehicle
with ESP )
R
R
R
I5JB0D110002-02
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