Dlc (Data Link Connector); Engine And Emission Control System Description - Suzuki 2006 SX4 Service Manual

• CMP sensor
• CKP sensor
• Knock sensor
• Wheel speed sensor
• CPU (Central Processing Unit) of ECM
• APP sensor
• Radiator cooling fan relay
• EVAP canister purge valve
• Starter relay
ECM and MIL operate as follows.
• MIL lights when the ignition switch is turned ON (but
the engine at stop) with the diagnosis switch terminal
ungrounded regardless of the condition of Engine and
Emission control system. This is only to check MIL in
the combination meter and its circuit.
• If the above areas of Engine and Emission control
system is free from any trouble after the engine start
(while engine is running), MIL turns OFF.
• When ECM detects a trouble which has occurred in
the above areas, it makes MIL turn ON while the
engine is running to warn the driver of such
occurrence of trouble and at the same time it stores
the trouble area in ECM back-up memory. (The
memory is kept as it is even if the trouble was only
temporary and disappeared immediately. And it is not
erased unless the power to ECM is shut off for
specified time or it is cleared by SUZUKI scan tool
(SUZUKI SDT) (2).)
For further detail of the checking / cleaning DTC
procedure, refer to "DTC Check" and "DTC
Clearance".
3
For information about the following items, refer to "Euro
OBD model: ".
1
2
I7RW01110012-01
Engine General Information and Diagnosis:
• Warm-up cycle
• Driving cycle
• 2 driving cycle detection logic
• Pending DTC

DLC (Data Link Connector)

NOTE
There are two types of OBD system
depending on the vehicle specification.
For identification, refer to "Precaution on On-
Board Diagnostic (OBD) System".
DLC (1) is in compliance with SAE J1962 in its
installation position, the shape of connector and pin
assignment.
OBD CAN Hi line (6) and Low line (3) (CAN line of ISO
15765-4) are used for SUZUKI scan tool (SUZUKI-SDT)
(7) or CAN communication OBD generic scan tool to
communicate with ECM (included in immobilizer control)
and TCM.
2
3
16 15 14
8 7 6
1
1
2. B + (Unswitched vehicle battery positive)
4. ECM ground (Signal ground)
5. Vehicle body ground (Chassis ground)
Engine and Emission Control System
Description
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 EVAP and PCV
systems.
S6RW0C1101024
13 12 11 10 9
5 4 3 2 1
6 5
4
7
I7RW01110092-01
S6RW0C1101014
1A-7