2007 ISUZU KB P190 ECO mode

Cruise Control – HFV6 Page 8C–4
NOTE Defined
A NOTE statement immediately precedes or follows an operating procedure, maintenance practice or condition that
requires highlighting. A NOTE statement also emphasises necessary characteristics of a diagnostic or repair procedure.
A NOTE statement is designed to:
• Clarify a procedure,
• Present additional information for accomplishing a procedure,
• Give insight into the reasons for performing a procedure in the recommended manner, and / or
• Present information that gives the technician the benefit of past experience in accomplishing a procedure with
greater ease.
1.2 System Components
The main components of the electronic cruise control system are:
• cruise control ON / OFF switch (in dash panel).
• cruise control switch assembly (incorporated into wiper and washer switch assembly),
• instrument cluster assembly (cruise set lamp),
• clutch pedal switch assembly (manual transmission vehicles only),
• stop lamp switch assembly,
• powertrain interface module (PIM),
• engine control module (ECM),
• throttle actuator control (TAC) assembly, and
• electrical wiring (incorporated into the main wiring harness).

Figure 8C – 1

BACK TO CHAPTER INDEX TO MODEL INDEXISUZU KB P190 2007

Cruise Control – HFV6 Page 8C–7
Activated and Deactivated
When the cruise control is enabled, the vehicle speed must be above 40 km/h and the cruise control switch assembly
pressed to SET–COAST, the cruise control will be activated and the vehicle will maintain the set speed. When
deactivated by the methods described within this section, the vehicle will no longer maintain the set speed, but the cruise
control will still be engaged.
Cruise Active
When the cruise control is activated via the cruise control
switch assembly, the cruise set warning lamp will illuminate
the instrument cluster assembly.
Cruise Deactivated
Upon receiving a signal to deactivate the cruise control the
ECM will provide a signal to the instrument cluster, via the
PIM, to inform the user the cruise control is deactivated.
When the cruise control is deactivated via the cruise control
switch assembly, the brake pedal, or the clutch pedal, the
cruise set warning lamp will turn OFF within the instrument
cluster assembly.
Figure 8C – 5
Enabling the Cruise Control
Refer to 2.3 Wiring Diagrams for the following description.
W hen the cruise control ON-OFF button is pressed, 12 V is applied to the powertrain interface module (PIM) connector
B – 97 pin 14. This informs the PIM the user has requested the cruise control function be engaged or disengaged. This
signal is then output by the PIM as GM LAN protocol along the bus to the engine control module (ECM). The ECM
recognises the command from the PIM to engage the cruise control. The PIM then provides a ground signal to B – 97 pin
13 the cruise control ON-OFF switch indicator lamp, to inform the user the cruise control is engaged.
Brake Before Cruise
Before the cruise control can be activated the driver must have applied the brakes and the system received a valid
response at least once per ignition cycle. If the driver manages to drive the vehicle without having used the brakes before
pressing the cruise control ON–OFF button, the cruise control cannot be activated.
Activating the Cruise Control
The user activates the cruise control at a desired speed above 40 km/h by pressing the cruise control switch assembly
SET–COAST button. This provides a 12 V signal to the PIM through connector B – 97 pin 15. The PIM then outputs this
signal as GM LAN protocol through the data bus to the ECM. If the ECM already has cruise control engaged, upon
receipt of the message from the PIM, the ECM will activate cruise control and set the speed. The ECM receives all the
various inputs required to maintain the correct speed and then controls the throttle actuator control assembly depending
on the load on the engine (ascending or descending hills, etc).
Deactivating the Cruise Control
When the cruise control is activated, it can be deactivated by any of the following:
Pressing the Brake Pedal
When the brake pedal is pressed, two signals are sent directly to the ECM by the circuits from the brake pedal switch
assembly. The cruise cancel circuit will open (normally closed) thus dropping the supply voltage from the ECM connector
C – 56 pin 46. Simultaneously, the stop lamp circuit will close (normally open) and supply 12 V to the ECM at connector
C – 56 pin 10. This is a double redundancy system so that if either switch or circuit from the brake pedal switch assembly
fails, the cruise control will still be deactivated.

BACK TO CHAPTER INDEX TO MODEL INDEXISUZU KB P190 2007

Cruise Control – HFV6 Page 8C–25

Reinstall
6 Install the clutch switch (1) as follows:
a Insert the switch into the clutch pedal bracket.
b Rotate the switch clockwise until obtaining the clearance (2) between the pedal (3) and the
pedal stoper.
Clutch pedal and pedal stoper
clearance specification............................... 0.5 – 1.5 mm
c Tighten the lock nut (4) to the correct torque specification.
Clutch switch lock nut
torque specification ............................................ 31.0 Nm
d Recheck the clutch switch clearance, readjust clearance if required.
NOTE
No adjustment is required for the clutch switch
itself.

Figure 8C – 15

7 Reconnect the electrical connector to the clutch switch.
8 Verify the operation of the clutch switch by operating the cruise control and checking the clutch switch stops operation of the cruise control when the clutch pedal is pressed.

BACK TO CHAPTER INDEX TO MODEL INDEXISUZU KB P190 2007

9A-14 SUPPLEMENTAL RESTRAINT SYSTEM
Component Description
SRS Control Unit
WARNING: DURING SERVICE PROCEDURES, BE
VERY CAREFUL WHEN HANDLING A SRS
CONTROL UNIT. NEVER STRIKE OR JAR THE SRS
CONTORL UNIT. NEVER POWER UP THE SRS
WHEN THE SRS CONTROL UNIT IS NOT RIGIDLY
ATTACHED TO THE VEHICLE. ALL SRS CONTROL
UNIT AND MOUNTING BRACKET FASTENERS
MUST BE CAREFULLY TORQUED AND THE
ARROW MUST BE POINTED TOWARD THE FRONT
OF THE VEHICLE TO ENSURE PROPER
OPERATION OF THE SRS. THE SRS CONTROL
UNIT COULD BE ACTIVATED WHEN POWERED
WHILE NOT RIGIDLY ATTACHED TO THE
VEHICLE WHICH COULD CAUSE DEPLOYMENT
AND RESULT IN PERSONAL INJURY.
The SRS control unit is designed to perform the
following functions in the SRS:
1. Energy Reserve — The SRS control unit maintains 30–Volt Loop Reserve (30VLR) energy supply to
provide deployment energy when ignition voltage is
lost in a frontal crash.
2. Frontal Crash Detection — The SRS control unit monitors vehicle velocity changes to detect frontal
crashes which are severe enough to warrant
deployment.
3. Air Bag Deployment — W hen a frontal crash o
f
sufficient force is detected, the SRS control unit
will cause enough current to flow through the ai
r
bag assembly to deploy the air bag.
4. Malfunction Detection — The SRS control unit performs diagnostic monitoring of SRS electrical
components and sets a diagnostic trouble code
when a malfunction is detected.
5. Frontal Crash Recording — The SRS control unit records information regarding SRS status during
frontal crash.
6. Malfunction Diagnosis — The SRS control unit displays SRS diagnostic trouble codes and system
status information through the use of a scan tool.
7. Driver Notification — The SRS control unit warns the vehicle driver of SRS malfunctions b
y
controlling the “SRS” warning lamp.


The SRS control unit is connected to the SRS wiring
harness by a 52–pin connector. This harness
connector uses a shorting clip across certain terminals
in the contact area. This shorting clip connects the
“SRS” warning lamp to ground when the SRS control
unit harness connector is disconnected or CP
A
(Connector Position Assurance) is not inserted even i
f
completely connected. This will cause the “SRS”
warning lamp to come “ON” steady whenever the
ignition switch is at the ON or START positions with
the SRS control unit disconnected.


RTW 79ASH000401
Legend
(1) SRS Control Unit
(2) SRS Harness


“SRS” Warning Lamp
Ignition voltage is applied to the “SRS” warning lamp
when the ignition switch is at the ON or START
positions. The SRS control unit controls the lamp b
y
providing ground with a lamp driver. The “SRS”
warning lamp is used in the SRS to do the following:
1. Verify lamp and SRS control unit operation b
y
flashing SEVEN (7) times when the ignition switch
is first turned “ON”.
2. W arn the vehicle driver of SRS electrical system malfunctions which could potentially affect the
operation of the SRS. These malfunctions could
result in nondeployment in case of a frontal crash
or deployment for conditions less severe than
intended.
The “SRS “ warning lamp is the key to drive
r
notification of SRS malfunctions. For proper lamp
operation, refer to the “SRS Diagnostic System Check”
in this section.

BACK TO CHAPTER INDEX TO MODEL INDEXISUZU KB P190 2007

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”.


BACK TO CHAPTER INDEX TO MODEL INDEXISUZU KB P190 2007

SUPPLEMENTAL RESTRAINT SYSTEM 9A-21
On–Vehicle Service
Service Precaution
WARNING: WHEN PERFORMING SERVICE ON OR
AROUND SRS COMPONENTS OR SRS WIRING,
FOLLOW THE PROCEDURES LISTED BELOW TO
TEMPORARILY DISABLE THE SRS. FAILURE TO
FOLLOW PROCEDURES COULD RESULT IN
POSSIBLE AIR BAG DEPLOYMENT, PERSONAL
INJURY OR OTHERWISE UNNECESSARY SRS
REPAIRS.
The SRS control unit in Driver–Passenger SRS can
maintain sufficient voltage to cause a deployment fo
r
up to 15 seconds after the ignition switch is turned
“OFF,” the battery is disconnected, or the fuse
powering the SRS control unit is removed.
Many of the service procedures require removal of the
“SRS” fuse, and disconnection of the air bag assembl
y
from the deployment loop to avoid an accidental
deployment. If the air bag assembly is disconnected
from the deployment loop as noted in the “Disabling
the SRS” procedure that follows, service can begin
immediately without waiting for the 15 second time
period to expire.

Disabling The SRS
Removal
Turn the ignition switch to “LOCK” and remove the
key.
1. Remove the SRS fuse “SRS”, from the side of the driver’s side of the instrument panel fuse block o
r
disconnect the battery.
2. Disconnect the yellow connector at the base of the steering column.
3. Remove the glove box assembly, refer to “Passenger Air Bag Assembly Replacement” in
this manual.
4. Disconnect the yellow connector behind the glove box assembly.
CAUTION: With the “SRS” fuse removed and
ignition switched “ON”, the “SRS” warning lamp
will be “ON”. This is normal operation and does
not indicate an SRS malfunction.

Enabling The SRS
Installation
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.
Turn the ignition switch to “LOCK” and remove the
key.
1. Connect the yellow connector passenger air bag assembly.
2. Install the glove box assembly. Refer to “Passenger air bag assembly replacement” in this
manual.
3. Connect the yellow connector at the base of the steering column.
4. Install the “AIR BAG” fuse “SRS” to the side of the driver’s side of the instrument panel fuse block o
r
connect the battery.
Turn the ignition switch to “ON” and verify that the
“SRS” warning lamp flashes seven times and then
turns to “LOCK”. If it does not operate as described,
perform the “SRS Diagnostic System Check” in this
manual.

Handling / Installation / Diagnosis
1. The air bag assembly should not be subjected to temperatures above 65
°C (150°F).
2. The air bag assembly, and SRS control unit, should not be used if they have been dropped from
a height of 100 centimeters (3.28 feet) or more.
3. W hen the SRS control unit is replaced, it must be oriented with the arrow on the sensor pointing
toward the front of the vehicle. It is very important
for the SRS control unit to be located flat on the
mounting surface, parallel to the vehicle datum
line. It is important that the SRS control unit
mounting surface is free of any dirt or other foreign
material.
4. Do not apply power to the SRS unless all components are connected or a diagnostic chart
requests it, as this will set a diagnostic trouble
code.
5. The “SRS Diagnostic System Check” must be the starting point of any SRS diagnostics. The “SRS
Diagnostic System Check” will verify proper “SRS”
warning lamp operation and will lead you to the
correct chart to diagnose any SRS malfunctions.
Bypassing these procedures may result in
extended diagnostic time, incorrect diagnosis, and
incorrect parts replacement.


BACK TO CHAPTER INDEX TO MODEL INDEXISUZU KB P190 2007

9A-24 SUPPLEMENTAL RESTRAINT SYSTEM
WARNING: WHEN STORING A LIVE AIR BAG
ASSEMBLY OR WHEN LEAVING A LIVE AIR BAG
ASSEMBLY UNATTENDED ON A BENCH OR
OTHER SURFACE, ALWAYS FACE THE AIR BAG
AND TRIM COVER UP AND AWAY FROM THE
SURFACE. THIS IS NECESSARY SO THAT A FREE
SPACE IS PROVIDED TO ALLOW THE AIR BAG TO
EXPAND IN THE UNLIKELY EVENT OF
ACCIDENTAL DEPLOYMENT. FAILURE TO
FOLLOW PROCEDURES MAY RESULT IN
PERSONAL INJURY.
6. Place the driver air bag assembly on a work bench or other surface away from all loose or flammable
objects with its trim cover facing up, away from the
surface.




RTW 79ASH001101
7. Clear a space on the ground about 183 cm (six
feet) in diameter where the driver air bag assembl
y
is to be deployed. A paved, outdoor location
where there is no activity is preferred. If an
outdoor location is not available, a space on the
shop floor where there is no activity and there is
sufficient ventilation is recommended. Ensure no
loose or flammable objects are within the
deployment area.






RTW 79ASH001201
8. Place the driver air bag assembly, with its trim
cover facing up, on the ground in the space just
cleared.
9. Stretch the SRS deployment harness and pigtail adapter from the driver air bag assembly to its full
length.
10. Place a power source near the shorted end of the SRS deployment harness. Recommended
application: 12 volts minimum, 2 amps minimum.
A vehicle battery is suggested.
11. Connect the driver air bag assembly to the pigtail adapter on the SRS deployment harness. The
deployment harness shall remain shorted and not
be connected to a power source until the air bag is
to be deployed. The driver air bag assembly will
immediately deploy the air bag when a powe
r
source is connected to it.
NOTE: Ensure that the pigtail adapter is firmly seated
into the driver air bag assembly connector. Failure to
fully seat the connectors may leave the shorting ba
r
located in the driver air bag assembly connecto
r
functioning (shorted) and may result in no deployment
of the driver air bag assembly.
12. Verify that the area around the driver air bag assembly is clear of all people and loose o
r
flammable objects.
13. Verify that the driver air bag assembly is resting with its trim cover facing up.
14. Notify all people in the immediate area that you intend to deploy the driver air bag. The
deployment will be accompanied by a substantial
noise which may startle the uninformed.
15. Separate the two banana plugs on the SRS deployment harness.


BACK TO CHAPTER INDEX TO MODEL INDEXISUZU KB P190 2007

SUPPLEMENTAL RESTRAINT SYSTEM 9A-25
NOTE: W hen the air bag deploys, the driver air bag
assembly may jump about 30 cm (one foot) vertically.
This is a normal reaction of the driver air bag to the
force of the rapid gas expansion inside the air bag.

NOTE: W hen the air bag deploys, the rapid gas
expansion will create a substantial noise. Notify all
people in the immediate area that you intend to deplo
y
the driver air bag.

WARNING: THE DEPLOYMENT HARNESS SHALL
REMAIN SHORTED AND NOT BE CONNECTED TO
A POWER SOURCE UNTIL THE AIR BAG IS TO BE
DEPLOYED. THE AIR BAG ASSEMBLY WILL
IMMEDIATELY DEPLOY THE AIR BAG WHEN
A
POWER SOURCE IS CONNECTED TO IT.
CONNECTING THE DEPLOYMENT HARNESS TO
THE POWER SOURCE SHOULD ALWAYS BE THE
LAST STEP IN THE AIR BAG ASSEMBLY
DEPLOYMENT PROCEDURE. FAILURE TO
FOLLOW PROCEDURES IN THE ORDER LISTED
MAY RESULT IN PERSONAL INJURY.
16. Connect the SRS deployment harness wires to the power source to immediately deploy the driver ai
r
bag. Recommended application: 12 volts
minimum, 2 amps minimum. A vehicle battery is
suggested.
17. Disconnect the SRS deployment harness from the power source.
18. Short the two SRS deployment harness leads together by fully seating one banana plug into the
other.
19. In the unlikely event that the driver air bag assembly did not deploy after following these
procedures, proceed immediately with Steps 24
through 26. If 19. the driver air bag assembly did
deploy, proceed with Steps 20 through 23.
20. Put on a pair of shop gloves and safety glasses to protect your hands and eyes from possible
irritation and heat when handling the deployed
driver air bag assembly. After the air bag assembl
y
has been deployed, the surface of the air bag may
contain a powdery residue. This power consists
primarily of cornstarch (used to lubricate the bag
as it inflates) and by-products of the chemical
reaction. Sodium hydroxide dust (similar to lye
soap) is produced as a by-product of the
deployment reaction. The sodium hydroxide then
quickly reacts with the atmospheric moisture and
is converted to sodium carbonate and sodium
bicarbonate (baking soda). Therefore, it is unlikel
y
that sodium hydroxide will be present after
deployment.

WARNING: SAFETY PRECAUTIONS MUST BE
OBSERVED WHEN HANDING A DEPLOYED AIR
BAG ASSEMBLY. AFTER DEPLOYMENT, THE
METAL SURFACES OF THE AIR BAG ASSEMBLY
WILL BE VERY HOT. ALLOW THE INFLATOR
MODULE TO COOL BEFORE HANDLING ANY
METAL PORTION OF IT. DO NOT PLACE THE
DEPLOYED AIR BAG ASSEMBLY NEAR ANY
FLAMMABLE OBJECTS. FAILURE TO FOLLOW
PROCEDURES MAY RESULT IN FIRE OR
PERSONAL INJURY.
AFTER A DRIVER AIR BAG ASSEMBLY HAS BEEN
DEPLOYED, THE METAL CANISTER AND
SURROUNDING AREAS OF THE DRIVER AIR BAG
ASSEMBLY WILL BE VERY HOT. DO NOT TOUCH
THE METAL AREAS OF THE DRIVER AIR BAG
ASSEMBLY FOR ABOUT TEN MINUTES AFTER
DEPLOYMENT. IF THE DEPLOYED DRIVER AIR
BAG ASSEMBLY MUST BE MOVED BEFORE IT IS
COOL, WEAR GLOVES AND HANDLE BY THE AIR
BAG OR TRIM COVER.
21. Disconnect the pigtail adapter from the driver ai
r
bag assembly as soon after deployment as
possible. This will prevent damage to the pigtail
adapter or SRS deployment harness due to
possible contact with the hot driver air bag
assembly canister. The pigtail adapter can be
reused. They should, however, be inspected fo
r
damage after each deployment and replaced i
f
necessary.
22. Dispose of the deployed driver air bag assembl
y
through normal refuse channels after it has cooled
for at least 30 minutes.
23. W ash your hands with mild soap and wate
r
afterward.
NOTE: The remaining steps are to be followed in the
unlikely event that the driver air bag assembly did not
deploy after following these procedures.
24. Ensure that the SRS deployment harness has been disconnected from the power source and that
its two banana plugs have been shorted togethe
r
by fully seating one banana plug into the other.
25. Disconnect the pigtail adapter from the driver ai
r
bag assembly.
WARNING: WHEN STORING A LIVE AIR BAG
ASSEMBLY OR WHEN LEAVING A LIVE
INFLATOR MODULE UNATTENDED ON A BENCH
OR OTHER SURFACE, ALWAYS FACE THE BAG
AND TRIM COVER UP AND AWAY FROM THE
SURFACE. THIS IS NECESSARY SO THAT A FREE
SPACE IS PROVIDED TO ALLOW THE AIR BAG TO
EXPAND IN THE UNLIKELY EVENT OF
ACCIDENTAL DEPLOYMENT. FAILURE TO
FOLLOW PROCEDURES MAY RESULT IN
PERSONAL INJURY.


BACK TO CHAPTER INDEX TO MODEL INDEXISUZU KB P190 2007