2007 ISUZU KB P190 warning

9A1-44 RESTRAINT CONTROL SYSTEM

DTC Will Set When
The combined resistance of the passenger pretensioner
assembly, harness wiring circuits “Passsenger
Pretensioner High” and “Passenger Pretensioner Low”,
and connector terminal contact is above a specified
value. This test is run once each ignition cycle during
the “Resistance Measurement Test” when:
1. No “higher priority faults” are detected during “Turn–
ON”,
2. “Ignition 1” voltage is in the specified value.

Action Taken
SRS control unit turns “ON” the “AIR BAG” warning
lamp and sets a diagnostic trouble code.

DTC Will Clear When
The ignition switch is turned “LOCK”.

DTC Chart Test Description
Number(s) below refer to step number(s) on the
diagnostic chart:
2. This test determines whether the malfunction is in
the SRS control unit.
3. This test verifies connection of the yellow connector.
4. This test cheeks for proper operation of the shorting
clip in the yellow connector.
5. The test checks for a malfunction passenge
r
pretensioner assembly.
6. This test determines whether the malfunctioning is
due to shortening in the wiring.

Diagnostic Aids

An intermittent condition is likely to be caused by a short
between circuits “Passenger Pretensioner High” and
“Passenger Pretensioner Low” or a malfunctioning
shorting clip on the passenger pretensioner assembl
y
which would require replacement of the pretensione
r
assembly. The test for this diagnostic trouble code is
only run while “AIR BAG” warning lamp is performing
the bulb check. W hen a scan tool “Clear Codes”
command is issued and the malfunction is still present,
the DTC will not reappear until the next ignition cycle.


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ISUZU KB P190 2007

9A1-46 RESTRAINT CONTROL SYSTEM

DTC B0033 (Flash Code 33) Passenger Pretensioner Squib Circuit Short to
GND



RTW 79ALF000301

Circuit Description
W hen the ignition switch is turned “ON”, the SRS
control unit will perform tests to diagnose critical
malfunctions within itself. Upon passing these tests,
“Ignition 1”, and pretensioner loop voltages are
measured to ensure they are within their respective
normal voltage ranges.
The SRS control unit monitors the voltages at “Drive
r
Pretensioner Low” terminal “7” and “Passenger
Pretensioner Low” terminal “10” to detect short to
ground/+B in the pretensioner assembly circuits.

DTC Will Set When
“Ignition 1" is in the normal operating voltage range.
The voltage at “Passenger Pretensioner Low " is belo
w
a specified value,
DTC B0033 will set.

Action Taken
SRS control unit turns “ON” the “SRS” warning lamp
and sets a diagnostic trouble code.

BACK TO CHAPTER INDEX TO MODEL INDEX
ISUZU KB P190 2007

RESTRAINT CONTROL SYSTEM 9A1-49

DTC B0034 (Flash Code 34) Passenger Pretensioner Squib Circuit Short to
Battery Voltage



RTW 79ALF000301

Circuit Description
W hen the ignition switch is turned “ON”, the SRS
control unit will perform tests to diagnose critical
malfunctions within itself. Upon passing these tests,
“Ignition 1”, and pretensioner loop voltages are
measured to ensure they are within their respective
normal voltage ranges.
The SRS control unit monitors the voltages at “Drive
r
Pretensioner Low” terminal “7” and “Passenger
Pretensioner Low” terminal “10” to detect short to
ground/+B in the pretensioner assembly circuits.

DTC Will Set When
“Ignition 1" is in the normal operating voltage range.
The voltage at “Passenger Pretensioner Low " is above
a specified value,
DTC B0034 will set.

Action Taken
SRS control unit turns “ON” the “SRS” warning lamp
and sets a diagnostic trouble code.

BACK TO CHAPTER INDEX TO MODEL INDEX
ISUZU KB P190 2007

9A1-52 RESTRAINT CONTROL SYSTEM

DTC Will Set When
The combined resistance of the driver pretensioner
assembly, harness wiring circuits “Driver Pretensioner
High” and “Driver Pretensioner Low”, and connector
terminal contact is above a specified value. This test is
run once each ignition cycle during the “Resistance
Measurement Test” when:
1. No “higher priority faults” are detected during “Turn–
ON”
2. “Ignition 1” voltage is in the specified value.

Action Taken
SRS control unit turns “ON” the “AIR BAG” warning
lamp and sets DTC B0041.

DTC Will Clear When
The ignition switch is turned “LOCK”.

DTC Chart Test Description
Number(s) below refer to circled number(s) on the
diagnostic chart:
2. This test determines whether the malfunction is in
the SRS control unit.
3. This test verifies proper connection of the yello
w
connector at the base of the driver seat.
4. This test checks for proper operation of the shorting
clip in the yellow connector.
5. This test isolate the malfunction to one side of the
SRS coil assembly yellow connector located at the
base of the driver seat.
6. This test determines whether the malfunction is due
to shortening in the wiring.
7. This test determines whether the malfunction is in
the driver pretensionerassembly.

Diagnostic Aids

An intermittent condition is likely to be caused by a short
between circuit “Driver Pretensioner High” or “Drive
r
Pretensioner Low” or a malfunctioning shorting clip on
the driver pretensioner assembly which would require
replacement of the component. The test for this
diagnostic trouble code is only run while the “AIR BAG”
warning lamp is performing the bulb check. W hen a
scan tool “Clear Codes” command is issued and the
malfunction is still present, the DTC will not reappea
r
until the next ignition cycle.


DTC B0041 (Flash Code 41) Driver Pretensioner Squib Circuit Low Resistance

Step Action Yes No
1 Perform the “SRS Diagnostic System Check.”
W as the “SRS Diagnostic System Check” performed? Go to Step 2 Go to the “SRS
Diagnostic System Check”
2
1. Check the driver pretensioner squib circuit for short to voltage
or short to ground.
2. If the problem found, repair as necessary.
W as a problem found? Verify repair Go to Step 3
3

1. Ignition switch is at “LOCK”.
2. Make sure the pretensioner assembly yellow connector
located at the base of the driver seat connected properly.
Is the connector connected properly? Go to Step 4 Seat driver
pretensioner assembly
connector properly.
Go to Step 8

BACK TO CHAPTER INDEX TO MODEL INDEX
ISUZU KB P190 2007

RESTRAINT CONTROL SYSTEM 9A1-55

DTC Will Clear When
The ignition switch is turned “LOCK”.

DTC Will Set When
The combined resistance of the driver pretensioner
assembly, harness wiring circuits “Driver Pretensioner
High” and “Driver Pretensioner Low”, and connector
terminal contact is above a specified value. This test
run once each ignition cycle during the “Resistance
Measurement Test” when:
1. No “higher priority faults” are detected during “Turn–
ON”
2. “Ignition 1” voltage is in the specified value.

Action Taken
SRS control unit turns “ON” the “AIR BAG” warning
lamp and sets DTC B0042.

DTC Chart Test Description
Number(s) below refer to step number(s) on the
diagnostic chart:
2. This test determines whether the malfunction is in
the SRS control unit.
3. This test verifies proper connection of the yello
w
connector at the base of the driver seat.
4. This test checks for proper contact and/or corrosion
of the connector terminals at the base of the drive
r
seat.
5. This test isolate the malfunction to one side of the
SRS coil assembly yellow connector located at the
base of the driver seat.
6. This test determines whether the malfunction is due
to high resistance in the wiring.
7. This test determines whether the malfunction is in
the driver pretensioner assembly.

Diagnostic Aids

An intermittent condition is likely to be caused by a poor
connection at the drive pretensioner harness connecto
r
terminals “1” and “2”, SRS control unit terminals “8” and
“7”, or a poor wire to terminal connection in circuit
“Driver Pretensioner High” or “Driver Pretensioner Low”
The test for this diagnostic trouble code is only run while
the “AIR BAG” warning lamp is performing the bulb
check. W hen a scan tool “Clear Codes” command is
issued and the malfunction is still present, the DTC will
not reappear until the next ignition cycle.

DTC B0042 (Flash Code 42) Driver Pretensioner Squib Circuit High Resistance

Step Action Yes No
1 Perform the “SRS Diagnostic System Check”.
W as the “SRS Diagnostic System Check” performed? Go to Step 2 Repeat the “SRS
Diagnostic System Check”
2
1. Check the driver pretensioner squib circuit for open.
2. If the problem found repair as necessary.
W as a problem found? Verify repair Go to Step 3
3

1. Ignition switch is at “LOCK”.
2. Disconnect SRS coil assembly yellow connector located at
base of the driver seat.
Is the connector connected properly? Go to Step 4 Seat pretensioner
assembly
connector properly.
Go to Step 8

BACK TO CHAPTER INDEX TO MODEL INDEX
ISUZU KB P190 2007

RESTRAINT CONTROL SYSTEM 9A1-57

DTC B0045 (Flash Code 45) Driver Pretensioner Squib Circuit Short to GND



RTW 79ALF000301

Circuit Description
W hen the ignition switch is turned “ON”, the SRS
control unit will perform tests to diagnose critical
malfunctions within itself. Upon passing these tests,
“Ignition 1”, and pretensioner loop voltages are
measured to ensure they are within their respective
normal voltage ranges.
The SRS control unit monitors the voltages at “Drive
r
Pretensioner Low” terminal “7” and “Passenger
Pretensioner Low” terminal “10” to detect short to
ground/+B in the pretensioner assembly circuits.

DTC Will Set When
“Ignition 1" is in the normal operating voltage range.
The voltage at “Driver Pretensioner Low " is below a
specified value,
DTC B0045 will set.

Action Taken
SRS control unit turns “ON” the “SRS” warning lamp
and sets a diagnostic trouble code.

BACK TO CHAPTER INDEX TO MODEL INDEX
ISUZU KB P190 2007

9A1-60 RESTRAINT CONTROL SYSTEM

DTC B0046 (Flash Code 46) Driver Pretensioner Squib Circuit Short to Battery
Voltage



RTW 79ALF000301

Circuit Description
W hen the ignition switch is turned “ON”, the SRS
control unit will perform tests to diagnose critical
malfunctions within itself. Upon passing these tests,
“Ignition 1”, and pretensioner loop voltages are
measured to ensure they are within their respective
normal voltage ranges.
The SRS control unit monitors the voltages at “Drive
r
Pretensioner Low” terminal “7” and “Passenger
Pretensioner Low” terminal “10” to detect short to
ground/+B in the pretensioner assembly circuits.

DTC Will Set When
“Ignition 1" is in the normal operating voltage range.
The voltage at “Driver Pretensioner Low " is above a
specified value,
DTC B0046 will set.

Action Taken
SRS control unit turns “ON” the “SRS” warning lamp
and sets a diagnostic trouble code.

BACK TO CHAPTER INDEX TO MODEL INDEX
ISUZU KB P190 2007

9A1-62 RESTRAINT CONTROL SYSTEM

DTC B0051 (Flash Code 51) Air Bag Squib Circuit Activated (Crash)



RTW 79ALF000301

Circuit Description
The SRS control unit contains a sensor which converts
vehicle velocity changes 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 and causing DTC B0051 to set.

DTC Will Set When
The SRS control unit detects a frontal crash, up to 30
degrees off the centerline of the vehicle, of sufficient
force to warrant deployment of the air bags.

Action Taken

SRS control unit turns “ON” the “SRS” warning lamp
and records “Crash Data”, and sets a diagnostic trouble
code.

DTC Will Clear When
The SRS control unit is replaced.

DTC Chart Test Description
Number(s) below refer to step number(s) on the
diagnostic chart:
2. If the air bag assembly(s) has not deployed, DTC
B0051 may have been falsely set.
3. If DTC B0051 has set with no signs of frontal impact,
the diagnostic trouble code has been falsely set.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007