2007 ISUZU KB P190 oil

8A-622 ELECTRICAL-BODY AND CHASSIS


No. Connector face No. Connector face
E67



Blue
Swirl control solenoid valve E77
(C24SE)

O2 sensor
E68
(C24SE)


Throttle position sensor E78

~
E80 NOT USED
E69



NOT USED E81




Speed sensor
E70
(C24SE)


IACV E82



NOT USED
E71



Gray
EGR brush DC motor position E83



Gray A/T fluid temperature sensor
E72
(C24SE)


Engine earth-A E84
(C24SE)

Knock sensor
E73


NOT USED E85
(C24SE)


MAP sensor
E74
(C24SE)


Engine earth-B E86



SilverThermo switch; QOS
E75
(C24SE)


Oil pressure switch E87



WhiteSolenoid CSD
E76


NOT USED E88



Silver
Thermo switch; EGR


BACK TO CHAPTER INDEX TO MODEL INDEXISUZU KB P190 2007

SUPPLEMENTAL RESTRAINT SYSTEM 9A-1
SECTION 9A
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
TABLE OF CONTENTS
PAGE
Service Precaution ....................................................................................................... 9A- 4
General Description...................................................................................................... 9A- 4 Restraint Devices ..................................................................................................... 9A- 4
System Description .................................................................................................. 9A- 5
Circuit Diagram ............................................................................................................. 9A- 6
SRS Component And Wiring Location View .............................................................. 9A- 10
Component Description ............................................................................................... 9A- 14 SRS Control Unit ...................................................................................................... 9A- 14
"SRS" Warning Lamp .............................................................................................. 9A- 14
SRS Coil Assembly .................................................................................................. 9A- 15
Air Bag Assemblies.................................................................................................. 9A- 15
Steering Column ...................................................................................................... 9A- 16
Knee Bolster ............................................................................................................. 9A- 16
Definitions .................................................................................................................... . 9A- 16
Diagnosis...................................................................................................................... . 9A- 18
Diagnostic Trouble Codes ....................................................................................... 9A- 18
Scan Tool Diagnostics............................................................................................. 9A- 18
Use Of Special Tools ............................................................................................... 9A- 18
SRS Connec tor Body Face Vie ws ............................................................................. ..9 A- 19
Repairs And Inspec tions Required After A n A ccident ............................................ ..9 A- 20
Accident With Deployment-Component Replacement And Inspections ............. 9A- 20
Accident With or Without Deployment-Component Inspection ........................... 9A- 20
SRS Control Unit Replacement Guidelines ........................................................... 9A- 20
Wiring Damage ......................................................................................................... 9A- 20
SRS Connector (Plastic Body And Terminal Metal Pin) Damage ......................... 9A- 20
SRS Wire Pigtail Damage ........................................................................................ 9A- 20
PAGE 1 OF 3

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SUPPLEMENTAL RESTRAINT SYSTEM 9A-3
PAGE
Steering Wheel .............................................................................................................. 9A- 38
Service Precautions ................................................................................................. 9A- 38
Removal .................................................................................................................... 9A- 38
Installation ................................................................................................................ 9A- 38
SRS Coil Assembly ....................................................................................................... 9A- 39 Service Precautions ................................................................................................. 9A- 39
Removal. ................................................................................................................... 9A- 39
Installation. ............................................................................................................... 9A- 39
Steering Column ........................................................................................................... 9A- 4 0
Service Precautions ................................................................................................. 9A- 40
Removal .................................................................................................................... 9A- 40
Installation ................................................................................................................ 9A- 40
Passenger Air Bag Assembly ...................................................................................... 9A- 41 Service Precautions ................................................................................................. 9A- 41
Removal .................................................................................................................... 9A- 41
Installation ................................................................................................................ 9A- 42
Pretensioner Seat Belt (If so equipped) ...................................................................... 9A- 43 Removal .................................................................................................................... 9A- 43
Installation ................................................................................................................ 9A- 43
Main Data and Specifications ...................................................................................... 9A- 44 Fastener Tightening Specification.......................................................................... 9A- 44
Special Tools................................................................................................................. 9 A- 45
PAGE 3 OF 3

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SUPPLEMENTAL RESTRAINT SYSTEM 9A-5
System Description
The SRS consists of the SRS control unit, the driver
air bag assembly, the SRS coil assembly, the
passenger air bag assembly and the “SRS” warning
lamp in the instrument cluster. The SRS control unit,
SRS coil assembly (driver side only), driver air bag
assembly, passenger air bag assembly and connecto
r
wire make up the deployment loops. The function of
the deployment loops is to supply current through the
air bag assembly, which will cause deployment of the
air bags in the event of a frontal crash of sufficient
force, up to 30 degrees off the centerline of the
vehicle. The air bag assemblies are only supplied

enough current to deploy when the SRS control unit
detects vehicle velocity changes severe enough to
warrant deployment.
The SRS control unit contains a sensing device which
converts vehicle velocity change to an electrical signal.
The electrical signal generated is processed by the
SRS control unit and then compared to a value stored
in memory. W hen the generated signal exceeds the
stored value, the SRS control unit will cause current to
flow through the air bag assembly deploying the ai
r
bags.



RTW 79ALF000301

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SUPPLEMENTAL RESTRAINT SYSTEM 9A-15



RTW 79ASH000501

SRS Coil Assembly
The SRS coil assembly consists of two current
carrying coils. This is attached to the steering column
and allows rotation of the steering wheel while
maintaining continuous contact of the drive
r
deployment loop to the driver air bag assembly.
There is a shorting clip on the yellow connector nea
r
the base of steering column which connects the SRS
coil to the SRS wiring harness.
The shorting clip shorts to the SRS coil and driver ai
r
bag assembly when the yellow connector is
disconnected. The circuit to the driver air bag
assembly is shorted in this way to help prevent
unwanted deployment of the air bag when servicing
the steering column or other SRS components.

060R300047
Air Bag Assemblies
The air bag assembly consists of an inflatable air bag
assembly and an inflator. W hen the vehicle is in a
frontal crash of sufficient force the SRS control unit
causes current flow through the deployment loops.
Current passing through the inflator ignites the
material in the air bag assembly. The gas produced
from this reaction rapidly inflates the air bag assembly.
There is a shorting clip on the driver air bag assembl
y
connector which connects the SRS coil assembly. The
shorting clip shorts across the driver air bag assembl
y
circuits when the driver air bag assembly connector is
disconnected.
The circuit to the driver air bag assembly is shorted in
this way to help prevent unwanted deployment of the
air bag when servicing the driver air bag assembly, the
steering column or other SRS components.




RTW 79ASH001001

There is a shorting clip on the passenger air bag
assembly connector which connects to the SRS
harness. The shorting clip shorts across the
passenger air bag assembly circuit when the
passenger air bag assembly connector is
disconnected. The circuit to the passenger air bag
assembly is shorted in this way to help prevent
unwanted deployment of the air bag when servicing
the passenger air bag assembly, the instrument panel
or other SRS components.


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SUPPLEMENTAL RESTRAINT SYSTEM 9A-17
“Continuous Monitoring”
Tests are performed by the SRS control unit on the
SRS every 100 milliseconds while “Ignition 1” voltage
is in the normal operating voltage range at the SRS
control unit.
Data Link Connector (DLC)
Formerly “DLC”, a connector which allows
communication with an external computer, such as a
scan tool.
Datum Line
A base line parallel to the plane of the underbody or
frame from which all vertical measurements originate.
Deploy
To inflate the air bag.
Deployment Loops
The circuits which supply current to the air bag
assemblies to deploy the air bag.
Diagnostic Trouble Code (DTC)
Formerly “Code”, a numerical designator used by the
SRS control unit to indicate specific SRS malfunctions.
Driver Current Source
An output of the SRS control unit which applies current
into the driver air bag assembly circuit during the
“Initiator Assembly Resistance Test”.
Driver Air Bag Assembly
An assembly located in the steering wheel hub
consisting of an inflatable bag, an inflator and an
initiator.
EEPROM
Electrically Erasable Programmable Read Onl
y
Memory. Memory which retains its contents when
power is removed from the SRS control unit.
Ignition Cycle
The voltage at the SRS control unit “Ignition 1” input,
with ignition switch “ON”, is within the normal operating
voltage range for at least ten seconds before turning
the ignition switch “OFF”.
Ignition 1
A battery voltage (B+) circuit which is only powered
when the ignition switch is in the ON, or START
position.
Initiator
The electrical component inside the air bag assembl
y
which, when sufficient current flows, sets off the
chemical reaction that inflates the air bag.

“Initiator Assembly Resistance Test”
Tests are performed once for each ignition cycle when
no malfunctions are detected during “Turn–ON” o
r
“Continuous Monitoring”. This test checks for the
correct SRS control unit configuration for the vehicle,
shorts to “Ignition 1” in the deployment loops, high
resistance or opens in the “Driver Side” and
“Passenger Side” circuits and measures the resistance
of the inflator assembly consisting of 1) Initiators, 2)
SRS coil assembly (driver side only), 3) Connectors
and associated wiring.
Normal Operating Voltage Range
The voltage measured between the SRS control unit
“Ignition 1” terminals and “Ground” terminals is
between 9 and 16 volts.
Passenger Current Source
An output of the SRS control unit which applies current
into the passenger air bag assembly circuit during the
“Initiator Assembly Resistance Test”.
Passenger Air Bag Assembly
An assembly located in the front of the passenger side
of the instrument panel consisting of an inflatable bag,
an inflator and an initiator.
Scan Tool
An external computer used to read diagnostic
information from on–board computers via the data link
connector.
SRS control unit
SRS control unit which provides reserve energy to the
deployment loops, deploys the air bags when required
and performs diagnostic monitoring of all SRS
components.
Serial Data
Information representing the status of the SRS.
SRS
Supplemental Restraint System.
SRS Coil Assembly
An assembly of two current–carrying coils in the drive
r
deployment loop that allows the rotation of the steering
wheel while maintaining the continuous contact of the
driver deployment loop to the driver air bag assembly.
SRS Wiring Harness
The wires and connectors that electrically connect the
components in the SRS.
“Turn–ON”
Test which the SRS control unit performs on the SRS
once during each ignition cycle immediately afte
r
“Ignition 1” voltage is applied to the SRS control unit
and before “Continuous Monitoring”.


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9A-20 SUPPLEMENTAL RESTRAINT SYSTEM
Repairs And Inspections Required
After An Accident
If any SRS components are damaged, they must be
replaced. If SRS component mounting points are
damaged, they must be replaced.
• Never use SRS parts from another vehicle. This does not include remanufactured parts purchased
from an authorized dealer; they may be used fo
r
SRS repairs.
• Do not attempt to service the SRS control unit, the SRS coil assembly, or the air bag assembly.
Service of these items is by replacement only.
• Verify the part number of the replacement air bag assembly.

CAUTION: Never use the air bag assembly from
another vehicle or different model year air bag
assembly.
Use only a new air bag assembly matched to the
TFR/S which is being repaired.
CAUTION: Proper operation of the sensors and
supplemental restraint system (SRS) requires that
any repairs to the vehicle structure return it to the
original production configuration. Deployment
requires, at a minimum, replacement of the SRS
control unit, air bag assembly and dimensional
inspection of the steering column. Any visible
damage to the SRS control unit mounting bracket
(s) requires replacement, and the steering column
must be dimensionally inspected, whethe
r
deployment occurred or not.
Accident With Deployment – Component
Replacement And Inspections
Certain SRS components must be replaced or
inspected for damage after a frontal crash involving air
bag deployment. Those components are:
• Air bag assembly
• SRS control unit

CAUTION: Refer to “SRS control unit Replacement
Guidelines” below for important information on
SRS control unit replacement in both deployment
and non-deployment crashes.
• SRS coil assembly — Inspect wiring and connecto
r
for any signs of scorching, melting, or damage due
to excessive heat. Replace if damaged. Refer to
section “SRS Coil Assembly” in this manual.

Accident With or Without Deployment –
Component Inspection
Certain SRS system components and rotation parts
must be inspected after any crash, whether the air bag
has been deployed or not. Those components are:
• Steering column — Refer to Inspection Required “After an Accident” in this manual.
• Knee bolsters and mounting points — Inspect fo
r
any distortion, bending, cracking, or other damage.
• I/P steering column reinforcement plate — Inspect for any distortion, bending, cracking, or othe
r
damage.
• I/P braces — Inspect for any distortion, bending, cracking, or other damage.
• Seat belts and mounting points — Refer to “Seat Belts” in Section “Seat Belt” of this workshop
manual.

SRS Control Unit Replacement Guidelines
SRS control unit replacement policy requires
replacement of the SRS control unit after a crash
involving air bag deployment when the “SRS W arning
Lamp” turned “ON”, the “SRS Diagnosis” should be
done according to Section “Restraint Control System.”

Wiring Damage
If any SRS wire harness is damaged, it should be
replaced. Don't repair the SRS harness. It is
replacement only.

SRS Connector (Plastic Body And
Terminal Metal Pin) Damage
If any connector or terminal in the SRS wire harness
(except pigtails) is damaged, it should be replaced.

SRS Wire Pigtail Damage
If the wiring pigtail (a wire or wires attached directly to
the device, not by a connector) is damaged, the entire
component (with pigtail) must be replaced. Examples
of “pigtail” components are the driver air bag
assembly, the passenger air bag assembly, and the
SRS coil assembly.


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SUPPLEMENTAL RESTRAINT SYSTEM 9A-33
Inspections Required After An Accident
CAUTION: Certain SRS components must be
replaced after a frontal crash involving air bag
deployment.
In all types of accidents regardless of “Air Bag”
deployment, visually inspect all of the following
components and replace as required:
– Driver air bag assembly
– Passenger air bag assembly
– Steering wheel
– SRS coil assembly
– Steering column
– Knee bolster and instrument panel mounting attachments
– Driver seat and belt
– Passenger seat and belt
– SRS control unit
The SRS control unit should always be checked
according to “SRS Control Unit Replacement
Guidelines.”
CAUTION: Refer to “SRS control unit Replacement
Guidelines” below for important information on
SRS control unit replacement in both deployment
and non–deployment crashes.
Inspect the SRS coil assembly wiring and the steering
wheel for any sign of scorching, melting, or damage
due to excessive heat. If the coil assembly wire o
r
steering wheel is damaged, replace them. The
steering column and wheel must be dimensionall
y
checked to determine if they are damaged. Refer to
“steering wheel” in this manual.
Never use SRS parts from another vehicle. This does
not include remanufactured parts purchased from an
authorized ISUZU/GM Retailer; they may be used fo
r
SRS repairs.
Do not attempt to repair the SRS control unit, the SRS
harness, the SRS coil assembly, the air bag assembly,
the steering wheel, or the steering column. Service o
f
these items is replacement only. Verify replacement
part numbers.
CAUTION: Proper operation of the SRS control
unit and the supplemental restraint system (SRS)
requires that any repairs to the vehicle structure
return it to its original production configuration.


SRS Connectors
CAUTION: The special yellow color connectors are
used for the supplemental restraint system-air bag
circuit. When removing the cable harness, do not
pull the cables otherwise cable disconnection may
occur. When connecting the SRS connector, insert
the connector completely. Imperfect locking may
cause malfunction of the SRS circuit.
Removal
To remove the connector, hold the cover insulator (1)
and pull it. The cover insulator slides and the lock will
be released. Do not hold the socket insulator (2).
827RW 028

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