Suzuki Grand Vitara JB416 / JB420. 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

Freeze frame data at initial detection of malfunction among misfire detected (P0300 – P0304), fuel
system too lean (P0171) and fuel system too rich (P0172)

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

P0401 (EGR)
detected

Data at P0401
detection

—

P0171 (Fuel system)
detected

Data at P0171
detection

Data at P0401
detection

Data at P0171
detection

—

P0300 (Misfire)
detected

Data at P0171
detection

Data at P0401
detection

Data at P0171
detection

Data at P0300
detection

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)

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.

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

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