Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 70

INTELLIGENT SUSPENSION

3F–1

AXIOM

SUSPENSION

INTELLIGENT SUSPENSION CONTROL

CONTENTS

Service Precaution

3F–2

. . . . . . . . . . . . . . . . . . . . . . 

General Description

3F–2

. . . . . . . . . . . . . . . . . . . . . 

PIN ASSIGNMENT TABLE

3F–4

. . . . . . . . . . . . . 

System Components

3F–4

. . . . . . . . . . . . . . . . . . . 

Control Unit

3F–4

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

Actuator

3F–4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Adjustable Damping Force Shock Absorber

3F–4

Warning Lamp

3F–4

. . . . . . . . . . . . . . . . . . . . . . . . 

Vertical G-Sensor

3F–5

. . . . . . . . . . . . . . . . . . . . . . 

Lateral G-Sensor

3F–5

. . . . . . . . . . . . . . . . . . . . . . 

Acronyms and Abbreviations

3F–5

. . . . . . . . . . . . 

General Diagnosis

3F–5

. . . . . . . . . . . . . . . . . . . . . . . 

General Information

3F–5

. . . . . . . . . . . . . . . . . . . . 

Service Precautions

3F–5

. . . . . . . . . . . . . . . . . . . 

Computer System Service Precautions

3F–5

. . . 

General Service Precautions

3F–5

. . . . . . . . . . . . 

Parts Handling

3F–5

. . . . . . . . . . . . . . . . . . . . . . . . 

FLASHING CODES

3F–6

. . . . . . . . . . . . . . . . . . . . 

CLEAR DTC

3F–7

. . . . . . . . . . . . . . . . . . . . . . . . . . 

INTERMITTENT CONDITIONS

3F–8

. . . . . . . . . 

BULB CHECK

3F–8

. . . . . . . . . . . . . . . . . . . . . . . . . 

DTC CHECK

3F–8

. . . . . . . . . . . . . . . . . . . . . . . . . . 

Connector List

3F–14

. . . . . . . . . . . . . . . . . . . . . . . . 

Diagnostic Trouble Code (DTC)
 Identification

3F–16

. . . . . . . . . . . . . . . . . . . . . . . . . 

DTC2 Actuator Coil Over Current

3F–17

. . . . . . . . . . 

Circuit Description

3F–17

. . . . . . . . . . . . . . . . . . . . . 

Diagnostic Aids

3F–17

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC3 Actuator Coil/Position Sensor Open
 Circuit or Short

3F–19

. . . . . . . . . . . . . . . . . . . . . . . . . 

Circuit Description

3F–19

. . . . . . . . . . . . . . . . . . . . . 

Diagnostic Aids

3F–19

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC4 G-Sensor Open Circuit or Short

3F–22

. . . . . 

Circuit Description

3F–22

. . . . . . . . . . . . . . . . . . . . . 

Diagnostic Aids

3F–22

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC5 Vehicle Speed Sensor Open Circuit
 or Short

3F–23

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Circuit Description

3F–23

. . . . . . . . . . . . . . . . . . . . . 

Diagnostic Aids

3F–23

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC6 Stop Lamp Switch Open Circuit
 or Short

3F–25

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Circuit Description

3F–25

. . . . . . . . . . . . . . . . . . . . . 

Diagnostic Aids

3F–25

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC7 Engine Speed Signal Open Circuit
 or Short

3F–27

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Circuit Description

3F–27

. . . . . . . . . . . . . . . . . . . . . 

Diagnostic Aids

3F–27

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC9 Control Unit Abnormality

3F–28

. . . . . . . . . . . . 

Control Unit

3F–32

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Removal

3F–33

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Installation

3F–33

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Front Actuator

3F–34

. . . . . . . . . . . . . . . . . . . . . . . . . . 

Removal

3F–35

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspection and Repair

3F–35

. . . . . . . . . . . . . . . . . . . . 

Installation

3F–35

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Rear Shock Absorber

3F–36

. . . . . . . . . . . . . . . . . . . . 

Removal

3F–37

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspection and Repair

3F–37

. . . . . . . . . . . . . . . . . . . . 

Installation

3F–37

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

SECTION

3F–2

INTELLIGENT SUSPENSION

Service Precaution

WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO  THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON  OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR  THE SRS
COMPONENTS OR THE SRS WIRING, REFER TO
THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS  COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.

CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener,  use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal.  ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use  supplemental coatings (Paints, greases, or
other corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally,  such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners,  use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage  to parts and
systems.

General Description

Intellignet suspension control uses a microcomputer as a
control unit to judge running conditions including engine
revolution from Powertrain Control Module, vehicle speed
from vehicle speed sensor, a brake switch signal, and
vertical and lateral G-sensor signal, then sets optimum
damping force so that best running stability can be
achieved.

INTELLIGENT SUSPENSION

3F–3

826R200007

3F–4

INTELLIGENT SUSPENSION

PIN ASSIGNMENT TABLE

PIN

No.

NAME

PIN

No.

NAME

PIN

No.

NAME

PIN

No.

NAME

1

GND

17

KI-FR B

33

KI-RR PSW

49

STOP

2

NC

18

KI-FR D

34

KI-RL Vcc

50

T-SW

3

Vdd

19

KI-FL B

35

KI-FR GND

51

M-SW

4

KI-FR A

20

KI-FL D

36

KI-FR Vs

52

Txd

5

KI-FR C

21

KI-RR B

37

KI-FL PSW

53

Vig

6

KI-FL A

22

KI-RR D

38

KI-FL Vs

54

NC

7

KI-FL C

23

KI-RL B

39

KI-FL GND

55

G3 GND

8

KI-RR A

24

KI-RL D

40

KI-RR GND

56

G3 Vs

9

KI-RR C

25

Vig

41

KI-RL PSW

57

NC

10

KI-RL A

26

GND

42

KI-RL GND

58

NC

11

KI-RL C

27

KI-FR Vcc

43

M.L

59

E/G

12

Vbat

28

KI-FR Vout

44

G3 Vcc

60

W.L

13

GND

29

KI-FR PSW

45

G3 Vout

61

GND

14

GND

30

KI-FL Vout

46

NC

62

GND

15

NC

31

KI-FL Vcc

47

NC

63

Rxd

16

Vdd

32

KI-RR Vcc

48

VSP

64

GND

NC: NO CONNECTION

System Components

Control Unit, 3 Vertical G-sensors, Lateral G-sensor, 4
Actuators, 4 Adjustable Damping Force Shock
Absorbers, and Warning Lamp.

Control Unit

The Control Unit consists of Adjustable Damping Force
Shock Absorber control circuits, fault detector, and a
fail-safe. It drives the actuator according to the signal
from each sensor.
The Control Unit has a self-diagnosing function which can
indicate faulty circuits during diagnosis.
The Control Unit is mounted in the center of the
instrument panel.

Actuator

Front actuators installed on front shock absorbers and
rear actuator installed inside rear shock absorbers control
damping force of shock absorber by the Control Unit
signal.

Adjustable Damping Force Shock
Absorber

This type shock absorber is used in front and rear
intelligent suspension. According to running condition the
Control Unit changes shock absorber damping force and
obtains good running stability.

Warning Lamp

821R200011

Vehicles equipped with the Intelligent Suspension Control
have an amber warning lamp in the instrument panel. The
warning lamp will illuminate if a malfunction in the
Intelligent Suspension Control is detected by the Control
Unit. In case of an important electronic malfunction, the
Control Unit will turn“ON” the warning lamp.