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 5725 of 6020
RESTRAINT CONTROL SYSTEM 9A1-43
DTC B0031 (Flash Code 31) Passenger Pretensioner Squib Circuit Low
Resistance
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 deployment loop voltages are
measured to ensure they are within their respective
normal voltage ranges. The SRS control unit then
proceeds with the “Resistance Measurement Test”.
“Passenger Pretensioner Low” terminal “10” is
grounded through a resistor and the passenger current
source connected to “Passenger Pretensioner High”
terminal “11” allows a known amount of current to flow.
By monitoring the voltage difference between
“Passenger Pretensioner High” and “Passenger
Pretensioner Low”, the SRS control unit calculates the
combined resistance of the passenger air bag
assembly, harness wiring circuits “Passenge
r
Pretensioner High” and “Passenger Pretensioner Low”
connector terminal contact.
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ISUZU KB P190 2007
Page 5726 of 6020
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
Page 5727 of 6020
RESTRAINT CONTROL SYSTEM 9A1-45
DTC B0031 (Flash Code 31) Passenger Pretensioner Squib Circuit Low Resistance
Step Action Yes No
1 W as the “SRS Diagnostic System Check” performed?
Go to Step 2 Repeat the “SRS
Diagnostic System Check”
2
1. Check the passenger pretensioner squib circuit for short to
valtage or short to ground.
2. If the broblem 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 passenger air bag assembly yellow connector
located at the base of the passenger seat.
Is the yellow connector connected properly? Go to Step 4 Seat passenger
pretensioner
assembly yellow connector properly.
Go to Step 7
4
1. Disconnect and inspect the passenger air bag assembly
yellow connector located at the base of the passenger seat.
2. If ok, reconnect the passenger air bag assembly connector.
3. Ignition switch is at “ON”.
Is DTC B0031 Current? Go to Step 5 Go to Step 7
5
1. Ignition switch is at “LOCK”.
2. Disconnect SRS coil and passenger pretensioner assembly,
yellow connector located at the base of the passenger seat.
3. Connect 5-8840-2421-0 SRS driver/passenger load tool and
appropriate adapters to passenger pretensioner assembly
harness connectors.
4. Ignition switch is at “ON”.
Is DTC B0031 current? Go to Step 6 Ignition switch is at
“OFF”.
Replace the passenger
pretensioner assembly.
Go to Step 7
6
1. Ignition switch is at “LOCK”.
2. There has been a decrease in the total circuit resistance of
the passenger inflator deployment loop.
3. Use the high resolution ohmmeter mode of the DVM while checking circuits “Passenger pretensioner High” and
“Passenger Pretensioner Low”, and SRS control unit
connector terminal “11” and “10” to locate the root cause.
W as a fault found? Replace SRS
harness or repair chassis harness. Go to Step 7 Go to Chart A
7
1. Reconnect all components, ensure all component are
properly mounted.
2. Clear diagnostic trouble codes.
W as this step finished? Repeat the “SRS
Diagnostic System Check” ―
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ISUZU KB P190 2007
Page 5728 of 6020
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.
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ISUZU KB P190 2007
Page 5729 of 6020
RESTRAINT CONTROL SYSTEM 9A1-47
DTC Will Clear When
The “Passenger Pretensioner Low " voltage comes to
specified voltage.
DTC Chart Test Description
Number(s) below refer to circled number(s) on the
diagnostic chart.
2. This test determines whether the SRS control unit is malfunctioning.
3. This test isolates the malfunction to one side of the passenger pretensioner assembly yellow connecto
r
at the base of the passenger seat.
4. This test determines whether the malfunction is in “Passenger Pretensioner High” circuit.
5. This test determines whether the malfunction is in “Passenger Pretensioner Low” circuit.
Diagnostic Aids
An intermittent condition is likely to be caused by a short
to ground in the passenger pretensioner assembl
y
circuit. Inspect circuits “Passenger Pretensioner High”
and “Passenger Pretensioner Low” carefully for cutting
or chafing. If the wiring pigtail of the passenge
r
pretensioner assembly is damaged, the component
must be replaced. A careful inspection of “Passenge
r
Pretensioner High” and “Passenger Pretensioner Low”,
including the passenger pretensioner assembly pigtail is
essential to ensure that the replacement SRS control
unit will not be damaged.
DTC B0033 (Flash Code 33) Passenger Pretensioner Squib Circuit Short to GND
Step Action Yes No
1 W as the “SRS Diagnostic System Check” performed? Go to Step 2 Go to the “SRS
Diagnostic System Check”
2 1. W hen measurements are requested in this chart use a 5-
8840-0366-0 DMM with a correct terminal adapter from 5-
8840-2835-0.
2. Ignition switch is at “LOCK”.
3. Ignition switch is “ON”.
4. Check the passenger pretensioner air bag squib circuit for short to ground.
W as a problem found? Go to Step 3
3
1. Ignition switch is at “LOCK”.
2. Disconnect passenger pretensioner assembly yellow
connector at the base of the passenger seat.
3. Leave driver air bag assembly connected.
4. Connect SRS driver / passenger load tool 5-8840-2421-0 and
appropriate adapter to passenger air bag assembly harness
connector.
5. Ignition switch is at “ON”.
Is DTC B0033 current? Go to Step 4 Ignition switch is at
“LOCK”.
Replace
passenger
pretensioner assembly .
Go to Step 6
4 1. Ignition switch is at “LOCK”.
2. Disconnect the SRS driver /passenger load tool.
3. Measure the resistance on the SRS control unit harness connector as follow.
z From terminals "11" to "3" and "15" (ground) (with the
passenger air bag)
z From terminals "11" to "3", "12" and "15" (ground)
(without the passenger air bag)
Does 5-8840-0366-0 display “OL” (Infinite)? Go to Step 5 Replace SRS
Harness.
Go to Step 6
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ISUZU KB P190 2007
Page 5731 of 6020
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.
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ISUZU KB P190 2007
Page 5732 of 6020
9A1-50 RESTRAINT CONTROL SYSTEM
DTC Will Clear When
The “Passenger Pretensioner Low " voltage comes to
specified voltage.
DTC Chart Test Description
Number(s) below refer to circled number(s) on the
diagnostic chart.
2. This test determines whether the SRS control unit is malfunctioning.
3. This test isolates the malfunction to one side of the passenger pretensioner assembly yellow connecto
r
at the base of the passenger seat.
4. This test determines whether the malfunction is in “Passenger Pretensioner High” circuit.
5. This test determines whether the malfunction is in “Passenger Pretensioner Low” circuit.
Diagnostic Aids
An intermittent condition is likely to be caused by a short
to +B in the passenger pretensioner assembly circuit.
Inspect circuits “Passenger Pretensioner High” and
“Passenger Pretensioner Low” carefully for cutting o
r
chafing. If the wiring pigtail of the passenger
pretensioner assembly is damaged, the component
must be replaced. A careful inspection of “Passenge
r
Pretensioner High” and “Passenger Pretensioner Low”,
including the passenger pretensioner assembly pgtail is
essential to ensure that the replacement SRS control
unit will not be damaged.
DTC B0034 (Flash Code 34) Passenger Pretensioner Squib Circuit Short to Battery Voltage
Step Action Yes No
1 W as the “SRS Diagnostic System Check” performed? Go to Step 2 Go to the “SRS
Diagnostic System Check”
2 1. W hen measurements are requested in this chart use a 5-
8840-0366-0 DMM with a correct terminal adapter from 5-
8840-2835-0.
2. Ignition switch is at “LOCK”.
3. Ignition switch is “ON”.
4. Check the passenger air bag squib circuit for a short to voltage.
W as a problem found? Go to Step 3
3
1. Ignition switch is at “LOCK”.
2. Disconnect passenger pretensioner assembly yellow
connector at the base of the passenger seat.
3. Leave driver air bag assembly connected.
4. Connect SRS driver / passenger load tool 5-8840-2421-0 and
appropriate adapter to passenger air bag assembly harness
connector.
5. Ignition switch is at “ON”.
Is DTC B0034 current? Go to Step 4 Ignition switch is at
“LOCK”.
Replace
passenger
pretensioner assembly .
Go to Step 6
4 Measure the resistance on the SRS control unit harness
connector from terminal “11” to terminal “1” (ignition).
Does 5-8840-0366-0 display “OL” (Infinite)? Go to Step 5 Replace SRS
Harness.
Go to Step 6
5 Measure the resistance on the SRS control unit harness connector from terminal “10” to terminal “1” (ignition).
Does 5-8840-0366-0 display “OL” (Infinite)? Go to Chart A Replace SRS
Harness.
Go to Step 6
6 1. Reconnect all the components and ensure all components
are properly mounted.
2. Clear diagnostic trouble codes.
Is this step finished? Go to the “SRS
Diagnostic system Check” ―
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ISUZU KB P190 2007
Page 5733 of 6020
RESTRAINT CONTROL SYSTEM 9A1-51
DTC B0041 (Flash Code 41) Driver Pretensioner Squib Circuit Low Resistance
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 deployment loop voltages are
measured to ensure they are within their respective
normal voltage ranges.
The SRS control unit then proceeds with the
“Resistance Measurement Test” “Driver Pretensioner
Low” terminal “7” is grounded through a current sink
and the driver current source connected to “Drive
r
Pretensioner High” terminal “8” allows a known amount
of current to flow. By monitoring the voltage difference
between “Driver Pretensioner High” and “Drive
r
Pretensioner Low” the SRS control unit calculates the
combined resistance of the driver pretensione
r
assembly, harness wiring circuits “Driver Pretensioner
High” and “Driver Pretensioner Low” and connector
terminal contact.
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ISUZU KB P190 2007
Page 5734 of 6020
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
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ISUZU KB P190 2007
Page 5735 of 6020
RESTRAINT CONTROL SYSTEM 9A1-53
Step Action Yes No
4
1. Disconnect and inspect the pretensioner yellow connector
located base of the driver seat.
2. If ok, reconnect the Pretensioner assembly yellow connector.
3. Ignition switch “ON.”
Is DTC B0041 current? Go to Step 5 Go to Step 8
5
1. Ignition switch is at “LOCK”.
2. Disconnect deive pretensioner assembly, yellow connector
located at the base of the driver seat.
3. Connect SRS driver / passenger load tool 5-8840-2421-0 and
appropriate adapter to drive pretensioner assembly harness
connectors.
4. Ignition switch “ON”.
Is DTC B0041 current? Go to Step 6 Go to Step 7
6
1. Ignition switch is at “LOCK”.
2. There has been a decrease in the total circuit resistance of
the driver deployment loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking circuits “Driver Pretensioner High” and “Driver
Pretensioner Low”, and SRS control unit connector terminal
“8” and “7” to locate the root cause.
W as a fault found? Replace SRS
harness or repair chassis harness. Go to Step 8 Go to Chart A
7
1. Ignition switch is at “LOCK”.
2. Disconnect SRS driver / passenger load tool from driver
pretensioner assembly harness connector.
3. Connect SRS driver / passenger load tool 5-8840-2421-0 to the top of steering column connector.
4. Reconnect pretensioner harness connector as the base of the
driver seat.
5. Ignition switch is at “ON”.
Is DTC B0041 current? Ignition switch is at
“OFF”.
Replace SRS coil assembly.
Go to Step 8 Ignition switch is at
“LOCK”.
Replace driver pretensioner assembly.
Go to Step 8
8
1. Reconnect all components, ensure all component are
properly mounted.
2. Clear diagnostic trouble codes.
W as this step finished? Go to the “SRS
Diagnostic System Check” ―
BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007