Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service 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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
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