ignition ISUZU KB P190 2007 Workshop Repair Manual
[x] Cancel search | Manufacturer: ISUZU, Model Year: 2007, Model line: KB P190, Model: ISUZU KB P190 2007Pages: 6020, PDF Size: 70.23 MB
Page 5661 of 6020
9A-26 SUPPLEMENTAL RESTRAINT SYSTEM
26. Temporarily store the driver air bag assembly with
its trim cover facing up, away from the surface
upon which it rests.
Deployment Outside Vehicle (Passenger
Air Bag Assembly)
WARNING: FAILURE TO FOLLOW PROPER SRS
AIR BAG ASSEMBLY DISPOSAL PROCEDURES
CAN RESULT IN AIR BAG DEPLOYMENT WHICH
MAY CAUSE PERSONAL INJURY. UNDEPLOYED
AIR BAG ASSEMBLIES MUST NOT BE DISPOSED
OF THROUGH NORMAL REFUSE CHANNELS.
THE UNDEPLOYED AIR BAG ASSEMBLY
CONTAINS SUBSTANCES THAT CAN CAUSE
SEVERE ILLNESS OR PERSONAL INJURY IF THE
SEALED CONTAINER IS DAMAGED DURING
DISPOSAL. DISPOSAL IN ANY MANNER
INCONSISTENT WITH PROPER PROCEDURES
MAY BE A VIOLATION OF FEDERAL, STATE
AND/OR LOCAL LAWS.
Deployment out of the vehicle is proper when the
vehicle is to be returned to service. This includes, fo
r
example, situations in which a functionally or
cosmetically deficient air bag assembly is replaced.
Deployment and disposal of an air bag assembly is, o
f
course, subject to any required retention period.
For deployment of a live air bag assembly out of the
vehicle, the deployment procedure must be followed
exactly. Always wear safety glasses during this
deployment procedure until the deployed air bag
assembly is scrapped. Before performing the
procedures, you should be familiar with servicing the
SRS system and with proper handling of the air bag
assembly. Procedures should be read fully before
they are performed.
The following procedure requires use of a 5-8840-
2468-0 SRS Deployment Harness with the appropriate
pigtail adapter. The procedure also requires the use
of a 5-8840-2420-0 Passenger Side SRS Module
Deployment Fixture. Do not attempt this procedure
without a 5-8840-2468-0 and adapter, and a 5-8840-
2420-0.
WARNING: FAILURE TO FOLLOW PROCEDURES
IN THE ORDER LISTED MA
Y RESULT IN
PERSONAL INJURY. NEVER CONNECT THE
DEPLOYMENT HARNESS TO ANY POWER
SOURCE BEFORE CONNECTING THE
DEPLOYMENT HARNESS TO THE AIR BAG
ASSEMBLY. 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. WEAR
SAFETY GLASSES THROUGHOUT THIS ENTIRE
DEPLOYMENT AND DISPOSAL PROCEDURE.
NOTE: This information applies only to passenger ai
r
bag assembly. Information for disposing of a live
driver air bag assembly can be found in “Deployment
Outside Vehicle” (Driver Air Bag Assembly) in this
section.
1. Turn the ignition switch to “LOCK”, remove the key, and put on the safety glasses.
2. Inspect the 5-8840-2468-0 SRS Deployment Harness and appropriate pigtail adapter fo
r
damage. If the harness or pigtail is damaged,
discard and obtain a replacement.
3. Short the two SRS Deployment Harness leads together by fully seating one banana plug into the
other. The SRS Deployment Harness shall remain
shorted and not be connected to a power source
until the air bag is to be deployed.
827RS003
4. Connect the appropriate pigtail adapter to the SRS Deployment Harness
827RS004
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Page 5663 of 6020
9A-28 SUPPLEMENTAL RESTRAINT SYSTEM
20. The passenger inflator requires no special
precaution after deployment. 95% of the
particulate emission is potassium chloride (KLC),
which is commonly sold as an edible salt-
substitute. Even if water is applied, post
deployment products are relatively pH neutral.
Disposing of the inflator by burying it in a landfill
will not produce any hazardous products. As with
any dusty environment, safety goggles, dust mask
and gloves should be worn.
WARNING: SAFETY PRECAUTIONS MUST BE
OBSERVED WHEN HANDLING A DEPLOYED AIR
BAG ASSEMBLY. AFTER DEPLOYMENT, THE
METAL SURFACES OF THE AIR BAG ASSEMBLY
WILL BE HOT. ALLOW THE AIR BAG ASSEMBLY
TO COOL BEFORE HANDLING ANY METAL
PORTION OF IT. DO NOT PLACE THE DEPLOYED
INFLATOR MODULE NEAR ANY FLAMMABLE
OBJECTS. FAILURE TO FOLLOW PROCEDURES
MAY RESULT IN FIRE OR PERSONAL INJURY.
AFTER AN AIR BAG ASSEMBLY HAS BEEN
DEPLOYED, THE METAL CANISTER AND
SURROUNDING AREAS OF THE AIR BAG
ASSEMBLY WILL BE HOT. DO NOT TOUCH THE
METAL AREAS OF THE AIR BAG ASSEMBLY FOR
ABOUT THIRTY MINUTES AFTER DEPLOYMENT.
IF THE DEPLOYED AIR BAG ASSEMBLY MUST BE
MOVED BEFORE IT IS COOL, WEAR GLOVES AND
HANDLE BY THE AIR BAG ITSELF.
21. Disconnect the pigtail adapter from the air bag assembly as soon after deployment as possible to
avoid damage to the pigtail adapter or SRS
deployment harness from contacting the hot ai
r
bag assembly canister. The pigtail adapter and
SRS deployment harness are designed to be
reused. They should, however, be inspected fo
r
damage after each deployment and replaced if
necessary.
22. Dispose of the deployed air bag assembly 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 air bag assembly did not deplo
y
after following the above 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 air bag assembly.
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 BAG 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.
26. Temporarily store the air bag assembly with the bag facing up, away from the surface upon which it
rests.
Deployment Inside Vehicle (Vehicle
Scrapping Procedure)
Deployment inside the vehicle is proper when the
vehicle is to be destroyed or salvaged for component
parts. This includes, but is not limited to, the following
situations:
1. The vehicle has completed its useful life.
2. The vehicle has been damaged beyond repair in a nondeployment type accident.
3. The vehicle has been stripped or damaged beyond repair in a theft.
4. The vehicle will be salvaged for component parts to be used on a vehicle with a different Vehicle
Identification Number (VIN) as opposed to being
rebuilt with the same VIN. Never use SRS
components from another vehicle.
WARNING: FAILURE TO FOLLOW PROPER SRS
AIR BAG ASSEMBLY DISPOSAL PROCEDURES
CAN RESULT IN AIR BAG DEPLOYMENT WHICH
MAY CAUSE PERSONAL INJURY. UNDEPLOYED
AIR BAG ASSEMBLIES MUST NOT BE DISPOSED
OF THROUGH NORMAL REFUSE CHANNELS.
THE UNDEPLOYED AIR BAG ASSEMBLY
CONTAINS SUBSTANCES THAT CAN CAUSE
SEVERE ILLNESS OR PERSONAL INJURY IF THE
SEALED CONTAINER IS DAMAGED DURING
DISPOSAL. DISPOSAL IN ANY MANNER
INCONSISTENT WITH PROPER PROCEDURES
MAY BE A VIOLATION OF FEDERAL, STATE
AND/OR LOCAL LAWS.
1. Turn the ignition switch to “LOCK,” remove the ke
y
and put on the safety glasses.
2. Remove all loose objects from the front seats.
3. Disconnect the driver air bag assembly yello
w
connector located at the base of the steering
column.
4. Cut the driver air bag assembly yellow harness connector from the vehicle leaving at least 15 cm
(six inches) of wire at the connector.
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Page 5667 of 6020
9A-32 SUPPLEMENTAL RESTRAINT SYSTEM
Service Precautions for SRS
Component Service
CAUTION: When fasteners are removed, always
reinstall them at the same location from which
they were removed. If a fastener needs to be
replaced, use the correct part number fastener fo
r
that application. If the correct part number
fastener is not available, a fastener of equal size
and strength (or stronger) may be used. Fasteners
that are not reused, and those requiring a thread
locking compound will be called out. The correct
torque value must be used when installing
fasteners that require it. If the above conditions
are not followed, parts or system damage could
result.
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 UNNEEDED SRS
REPAIRS.
The SRS control unit in the Driver–Passenger SRS
can maintain sufficient voltage to cause a deployment
for 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 “OFF” and turn the steering
wheel so that the vehicle's wheels are pointing straight
ahead.
1. Remove the SRS fuse “SRS” from the left dash side lower fuse block or disconnect the battery.
2. Disconnect the yellow connector at the base o
f
steering column.
3. Remove the glove box assembly; Refer to “Passenger air bag assembly replacement” in this
section.
4. Disconnect the passenger air bag assembly yello
w
connector behind the glove box assembly.
CAUTION: With the “SRS” fuse removed and the
ignition switch to “ON,” the “SRS” warning lamp
will be “ON.” This is normal operation and does
not indicate an SRS malfunction.
Enabling The SRS
Installation
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 section.
3. Connect the yellow connector at the base of the steering column.
4. Install the “AIR BAG” fuse “SRS” to the left dash side lower fuse block or 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
section.
Handling / Installation / Diagnosis
1. Air bag assembly should not be subjected to
temperatures above 65 °C (150 °F).
2.
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 a SRS control unit is replaced, it must be oriented with the arrow on the SRS control unit
pointing toward the front of the vehicle. It is ver
y
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 replacements.
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Page 5678 of 6020
SUPPLEMENTAL RESTRAINT SYSTEM 9A-43
Pretensioner Seat Belt (If so equipped)
Service Precaution
WARNING: WHEN PERFORMING SERVICE ON OR
AROUND THE PRETENSIONER SEAT BELT OR
THE PRETENSIONER SEAT BELT WIRING,
FOLLOW THE PROCEDURES LISTED BELOW TO
TEMPORARILY DISABLE THE PRETENSIONER
SEAT BELT.
FAILURE TO FOLLOW PROCEDURES COULD
RESULT IN POSSIBLE THE PRETENSIONER SEAT
BELT DEPLOYMENT, PERSONAL INJURY OR
OTHERWISE UNNEEDED THE PRETENSIONER
SEAT BELT REPAIR.
AS A PRECAUTION, WEAR GLOVES AND SAFETY
GLASSES WHEN PERFORMING THE
PRETENSIONER SEAT BELT. WHEN DEPLOY
A
LIVE PRETENSIONER SEAT BELT AT OUTSIDE
THE
VEHICLE, DEPLOYMENT HARNESS SHALL
REMAIN SHORTED AND NOT BE CONNECTED TO
A POWER SOURCE UNTIL THE PRETENSIONER
SEAT BELT IS TO BE DEPLOYED. THE
PRETENSIONER SEAT BELT WILL IMMEDIATELY
DEPLOY WHEN A POWER SOURCE IS
CONNECTED TO IT. CONNECTING THE
DEPLOYMENT HARNESS SHOULED ALWAYS BE
THE FINAL STEP IN THE PRETENSIONER SEAT
BELT DEPLOYMENT PROCEDURE. FAILURE TO
FOLLOW PROCEDURES IN THE ORDER LISTED
COULD RESULT IN PERSONAL INJURY.
Parts Location
RTW 49JSH000301
Legend
(1) Seat
(2) Bolt
(3) Pretensioner Harness
(4) Pretensioner
Removal
1. Turn ignition switch to “LOCK”, remove key.
2. Remove the foot rest located behind the seat.
3. Remove the cover on seat slide.
4. Disconnect the pretensioner connector at the base of the seat.
5. Remove four fixing bolts the seat slide and remove seat.
6. Remove the seat cover.
7. Remove the pretensioner seat belt assembly.
Installation
1. Install the pretensioner seat belt assembly.
2. Install the seat cover.
3. Install the seat on seat slide and four fixing bolts.
4. Connect the yellow pretensioner connector at the base of the seat.
5. Install the cover on seat slide.
6. Install the foot rest located behind the seat.
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Page 5685 of 6020
RESTRAINT CONTROL SYSTEM 9A1-3
Diagnostic Information
CAUTION: When fasteners are removed, always
reinstall them at the same location from which they
were removed. If a fastener needs to be replaced,
use the correct part number fastener for that
application. If the correct part number fastener is
not available, a fastener of equal size and strength
(or stronger) may be used. Fasteners that are not
reused, and those requiring thread locking
compound, will be called out. The correct torque
value must be used when installing fasteners that
require it. If the above conditions are not followed,
parts or system damage could result.
Diagnostic Procedures
WARNING: TO AVOID DEPLOYMENT WHEN
TROUBLESHOOTING THE SRS, DO NOT USE
ELECTRICAL TEST EQUIPMENT SUCH AS
A
BATTERY-POWERED OR AC-POWERED
VOLTMETER, OHMMETER, ETC., OR ANY TYPE OF
ELECTRICAL EQUIPMENT OTHER THAN THAT
SPECIFIED IN THIS MANUAL. DO NOT USE A NON-
POWERED, PROBE-TYPE TESTER.
INSTRUCTIONS IN THIS MANUAL MUST BE
FOLLOWED CAREFULLY, OTHERWISE PERSONAL
INJURY MAY RESULT.
The diagnostic procedures used in this section are
designed to aid in finding and repairing SRS problems.
Outlined below are the steps to find and repair SRS
problems quickly and effectively. Failure to carefull
y
follow these procedures may result in extended
diagnostic time, incorrect diagnosis and incorrect parts
replacement.
1. Perform The “SRS Diagnostic System Check”.
The “SRS Diagnostic System Check” should always be the starting point of any SRS diagnostics. The
“SRS Diagnostic System Check” checks for prope
r
“SRS” warning lamp operation and checks for SRS
trouble codes using both “Flash Code” and “Scan
Tool” Methods.
2. Refer To The Proper Diagnostic Chart As Directed By The “SRS Diagnostic System
Check”.
The “SRS Diagnostic System Check” will lead you to the correct chart to diagnose any SRS problems.
Bypassing these procedures may result in extended
diagnostic time, incorrect diagnosis and incorrect
parts replacement.
3. Repeat The “SRS Diagnostic System Check”
After Any Repair Or Diagnostic Procedures Has
Been Performed.
Performing the “SRS Diagnostic System Check” after all repairs or diagnostic procedures, will assure
that the repair has been made correctly and that no
other conditions exist.
Diagnostic Codes
The SRS control unit maintains a history record of all
diagnostic codes that have been detected since the
SRS codes were last cleared during service.
1. Active Codes - Faults that are presently detected in this ignition cycle. Active codes are stored in RAM
(Random Access Memory).
2. History Codes - All faults detected since the last time the history fault memory was cleared. History codes
are stored in the EEPROM. (Electronically Erasable
Programmable Read only Memory)
How To Read Trouble Codes
All codes (Active and history) can be read (or cleared)
by using a scan tool or equivalent.
If a PDT is not available, have the vehicle serviced by a
HOLDEN dealer.
How To Clear Trouble Codes
Trouble codes can only be cleared by using a Scan
Tool. If a “scan tool” is not available then inform the
owner of the stored codes and suggest that the codes
are cleared upon the next visit to a ISUZU/GM
dealership.
Scan Tool Diagnostics
A scan tool can be used to read current and history
codes and to clear all history codes after a repair is
complete. The scan tool must be updated to
communicate with the SRS through a replaceable
cartridge or a manufacturer's update before it can be
used for SRS diagnostics. To use the scan tool,
connect it to the DLC and turn the ignition switch “ON”.
Then follow the manufacturer's directions fo
r
communication with the SRS. The scan tool reads
serial data from the SRS control unit’s “Serial Data”
output (terminal 21) to the DLC (terminal 2).
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ISUZU KB P190 2007
Page 5686 of 6020
9A1-4 RESTRAINT CONTROL SYSTEM
Basic Knowledge Required
Before using this section of the Service Manual, some
basic knowledge is required. W ithout this knowledge,
you will have trouble using the diagnostic procedures in
this section. Use care to prevent any harm or unwanted
deployment. Read all cautions in the service manual
and on warning labels attached to SRS components.
Basic Electrical Circuits
You should understand the basic theory of electricity
including series and parallel circuits, and understand
the voltage drops across series resistors. You should
know the meaning of voltage (volts), current (amps),
and resistance (ohms). You should understand what
happens in a circuit with an open or a shorted wire. You
should be able to read and understand a wiring
diagram.
“Flash Code” Diagnostics
Flash code diagnostics can be used to read active
codes and to determine if history codes are present but
cannot be used to clear codes or read history codes.
Flash code diagnostics is enabled by grounding
terminal 4, shorting to terminal 13 of the DLC, with the
ignition switched “ON”. Grounding terminal 4 of the DLC
pulls the “Diagnostics Request” input (Terminal 1) of the
SRS control unit low and signals the SRS control unit to
enter the flash code diagnostic display mode.
060R300052
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ISUZU KB P190 2007
Page 5690 of 6020
9A1-8 RESTRAINT CONTROL SYSTEM
Circuit Description
W hen the ignition switch is first turned “ON”, “Ignition 1”
voltage is applied from the “SRS” fuse to the SRS
control unit at the “Ignition 1” input terminals “1”. The
SRS control unit responds by flashing the “SRS”
warning lamp seven times, while performing tests on
the SRS.
Notes On System Check Chart
1. The “SRS” warning lamp should flash seven times after the ignition is first turned “ON”.
2.
After the “SRS” warning lamp flashes seven times, it
should turn to “LOCK”
3. This test checks for the proper operation of the “Serial Data” line. This test will also determine
whether history diagnostic trouble codes are stored
and, if so, identify them.
4. Improper operation of the “SRS” warning lamp is indicated. This test differentiates between ‘a
warning lamp stays “ON” condition’ and ‘a warning
lamp does not come “ON” condition’.
5. This test checks for proper operation of the “Serial Data” line. This test will also identify the stored
diagnostic trouble codes and whether they are
current or history.
Diagnostic Aids
The order in which diagnostic trouble codes are
diagnosed is very important. Failure to diagnose the
diagnostic trouble codes in the order specified ma
y
result in extended diagnostic time, incorrect diagnosis
and incorrect parts replacement.
SRS Diagnostic System Check
Step Action Yes No
1 Note the “SRS” warning lamp as the ignition switch is turned
“ON”.
Does the “SRS” warning lamp flash seven (7) times? Go to Step 2 Go to Step 3
2 Note the “SRS” warning lamp after it flashed 7 times.
Does the “SRS” warning lamp go “OFF”? Go to Step 4 Go to Step 5
3 Note the “SRS” warning lamp as the ignition switch is turned
“ON”.
Does the “SRS” warning lamp come “ON” steady? Go to Chart B. Go to Chart C.
4
1. Note the “SRS” warning lamp as the ignition switch is turned
“ON”.
Ignition switch is at “LOCK”.
2. Connect a scan tool to data link connector.
3. Follow direction given in the scan tool instruction manual.
Ignition switch is “ON”.
4. Request the SRS diagnostic trouble code display, recode all
history diagnostic trouble code(s), specifying as current or
history in repair order.
Is (are) diagnostic trouble code(s) displayed?
Ignition switch
“LOCK”.
W hen DTC B0071 is set, go to DTC B0071 Chart.
For all other history codes refer to
“Diagnostic Aids” For that specific DTC.
A history DTC indicates the
malfunction has
been repaired or is intermittent. SRS is functional
and free of
malfunctions, no
further diagnosis is required.
If scan tool
indicated “NO DATA
RECEIVED,” refer to chassis
electrical section 8.
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ISUZU KB P190 2007
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RESTRAINT CONTROL SYSTEM 9A1-9
Step Action Yes No
5 1. Ignition switch is at “LOCK”.
2. Connect a scan tool to data link connector.
3. Follow directions as given in the scan tool instruction manual.
4. Ignition switch is “ON”.
5. Request the SRS diagnostic trouble code display, Recode all diagnostic trouble code(s), specifying as current or history in
repair order.
Is (are) diagnostic trouble code (s) displayed? Ignition switch
“LOCK”.
W hen the current DTC is set, go to applicable DTC chart.
And then if DTC B0019, B0025,
B0051, B0055 or
B0071 is set, go to these DTC chart first.
W hen only history
DTCs exist, refer to “Diagnostics Aids” for that specific DTC.
A history DTC indicates the
malfunction has
been repaired or is intermittent. If scan tool indicates
“No Data Received,” refer to chassis
electrical section 8.
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ISUZU KB P190 2007
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9A1-10 RESTRAINT CONTROL SYSTEM
Chart A SRS Control Unit Integrity Check
RTW 79ALF000301
Circuit Description
W hen the SRS control unit recognizes that “Ignition 1”
voltage, applied to terminals “1”, is greater than 9 volts,
the “SRS” warning lamp is flashed 7 times to verif
y
operation. At this time the SRS control unit performs
“Turn–ON” tests followed by “Continuous Monitoring”
tests. W hen a malfunction is detected, the SRS control
unit sets a current diagnostic trouble code and
illuminates the “SRS” warning lamp. The SRS control
unit will clear current diagnostic trouble codes and move
them to a history file when the malfunction is no longe
r
detected and/or the ignition switch is cycled, except for
DTCs B0051 and B0055.
Chart Test Description
Number(s) below refer to step number(s) on the
diagnostic chart:
1. This test confirms a current malfunction. If no current malfunction is occurring (history DTC set)
the “Diagnostic Aids” for the appropriate diagnostic
trouble code should be referenced. The SRS control
unit should not be replaced for a history diagnostic
trouble code.
2. This test checks for a malfunction introduced into the SRS during the diagnostic process. It is extremel
y
unlikely that a malfunctioning SRS control unit would
cause a new malfunction to occur during the
diagnostic process.
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ISUZU KB P190 2007
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RESTRAINT CONTROL SYSTEM 9A1-11
3. W hen all circuitry outside the SRS control unit has been found to operate properly, as indicated by the
appropriate diagnostic chart, then and only then
should the SRS control unit be replaced.
Chart A SRS control unit Integrity Check
WARNING: DURING SERVICE PROCEDURES. BE VERY CAREFUL WHEN HANDLING A SRS CONTROL UNIT.
NEVER STRIKE OR JAR THE SRS CONTROL 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 POINTING 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
Step Action Yes No
1 1. This chart assumes that the “SRS Diagnostic System Check”
and either a symptom chart or a diagnostic trouble code chart
diagnosis has been performed. W hen all circuitry outside the
SRS control unit has been found to operate properly, as
indicated by the appropriate diagnostic chart, and the
symptom or DTC remains current, check the following.
2. Diagnostic procedures must be performed to verify the need
for SRS control unit replacement.
3. Ignition switch is at “LOCK”.
4. Reconnect all SRS components and ensure all components are properly mounted.
5. Ensure the ignition switch has been in the “LOCK” position for
at least 15 seconds.
6. Note the “SRS” warning lamp as the ignition switch is turned
“ON”.
Does the warning lamp flash 7 times then go “OFF”? The symptom or
DTC is no longer occurring.
Clear SRS
diagnostic trouble codes.
Repeat “SRS
Diagnostic System Check” Go to Step 2
2 Using a scan tool, request the diagnostic trouble code display.
Is the same symptom or DTC occurring that was occurring when
the “SRS Diagnostic System Check” was first performed? Go to Step 3 Ignition switch
“LOCK”.
Go to the
appropriate chart for the indicated malfunction.
3 1. Clear the “SRS Diagnostic Trouble Codes”.
2. Ignition switch is in the “LOCK” position for at least two
minutes.
3. Note the “SRS” warning lamp as the ignition switch is turned
“ON”.
Does warning lamp flash 7 times then go “OFF”? SRS is functional
and free of
malfunctions.
No further
diagnosis is required.
Go to Step 4 Ignition switch
“LOCK”.
Replace SRS control unit.
Go to Step 4
4 Reconnect all SRS components, ensure all components are properly mounted.
Is this step finished? Repeat the “SRS
Diagnostic System Check” —
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ISUZU KB P190 2007