Suzuki Grand Vitara JB416 / JB420 (ESP model). Service 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