Suzuki Grand Vitara JB416 / JB420. Service manual — part 14
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”.)
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.
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.
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
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
Engine General Information and Diagnosis: 1A-6
Engine and Emission Control System Description
S5JB0A1101004
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
S5JB0A1101005
ECM (1), ABS hydraulic unit / control module assembly (2), TCM (for A/T model) (3), BCM (4), 4WD control module
(for J20 engine) (5), combination meter (6) and keyless start control module (if equipped) (7) of this vehicle
communicate control data between each control module.
Communication of each control module is established by CAN (Controller Area Network) communication system.
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.
4
5
6
7
1
2
3
I5JB0A110005-01
1A-7 Engine General Information and Diagnosis:
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 (for J20 engine), data is transmitted
only from ECM to combination meter, keyless start control module (if equipped) and 4WD control
module (for J20 engine). (Combination meter, keyless start control module (if equipped) and 4WD
control module (for J20 engine) 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)
Distance kilometers per
liter of fuel
Engine diagnostic trouble
codes (if equipped with
diagnosis connector)
TCM
(for A/T
model)
BCM
4WD
control
module
(for J20
engine)
Combination
Meter
Keyless Start
Control Module
(if equipped)
ABS
hydrauric
unit/control
module
assembly
Transmit
DATA
ECM
I5JB0A110006-02
Engine General Information and Diagnosis: 1A-8
ECM Reception Data
TCM
(for A/T model)
BCM
DATA
ECM
Receive
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
Torque request rolling count
Wheel speed pulse (rear right)
Wheel speed pulse (rear left)
Antilock brake system active
ABS hydraulic
unit/control module
assmbly
I5JB0A110007-01
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст