ISUZU TF SERIES 2004 Owners Manual
Manufacturer: ISUZU, Model Year: 2004, Model line: TF SERIES, Model: ISUZU TF SERIES 2004Pages: 4264, PDF Size: 72.63 MB
Page 91 of 4264
RESTRAINT CONTROL 9A1-21
DTC Will Clear When
The ignition switch is turned “OFF.”
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 yellow
connector.
4.
This test checks for proper contact and/or corrosion
of the yellow connector terminals.
5.
The test checks for a malfunctioning passenger ai
r
bag assembly.
6.
This test determines whether the malfunction is due
to high resistance in the wiring.
Diagnostic Aids
An intermittent condition is likely to be caused by a poor
connection at the passenger air bag assembly harness
connector terminals “1” and “2”, SRS control unit
terminal “48” and “47”, or a poor wire to terminal
connection in circuits “Passenger Bag High” and
“Passenger Bag Low”. This test for this diagnostic
trouble code is only run while the “AIR BAG” warning
lamp is performing the bulb check. When 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 B0017 (Flash Code 17) Passenger Airbag Squib Circuit High Resistance
Step Action Yes No
1 Was the “SRS Diagnostic System Check” Performed? Go to Step 2 Go to The “SRS
Diagnostic System
Check”
2
1. Check the passenger air bag squib circuit for open.
2. If the problem found, repair as necessary.
Was a problem found? Verify repair Go to Step 3
3
1. Ignition switch “Off.”
2. Make sure the passenger air bag assembly yellow connector
located behind the glove box assembly is seated properly.
Is the yellow connector connected properly? Go to Step 4 Seat passenger Air
Bag assembly
yellow connector
properly.
Go to Step 7
4
1. Disconnect and inspect the passenger air bag assembly
yellow connector located behind the glove box assembly.
2. If ok, reconnect the passenger air bag assembly connector.
3. Ignition switch “ON.”
Is DTC B0017 current? Go to Step 5 Go to Step 7
5
1. Ignition switch “Off.”
2. Disconnect SRS coil and passenger air bag assembly, yellow
connector located at the base of the steering column and
behind the glove box assembly.
3. Connect 5-8840-2421-0 SRS driver / passenger load tool and
appropriate adapters to SRS coil and passenger air bag
assembly harness connectors.
4. Ignition switch “ON.”
Is DTC B0017 Current? Go to Step 6 Ignition switch
“Off.”
Replace the
passenger air bag
assembly.
Go to Step 7
Page 92 of 4264
9A1-22 RESTRAINT CONTROL SYSTEM
Step Action Yes No
6
1. Ignition switch “Off.”
2. There has been an increase in the total circuit resistance of
the passenger inflator deployment loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking circuits “Pasenger Bag High” and “Passenger Bag
Low”, and SRS control unit connector terminal “48” and “47”
to locate the root cause.
Was a fault found? Replace SRS
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.
Was This step finished? Repeat the “SRS
Diagnostic System
Check” Go to Step 7
Page 93 of 4264
RESTRAINT CONTROL 9A1-23
DTC B0018 (Flash Code 18) Passenger Airbag Squib Circuit Voltage
Range/Performance
RTW49JLF000101
Circuit Description
When 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 monitors the voltages at “Drive
r
Bag Low” terminal “46” and “Passenger Bag Low”
terminal “47” to detect short to ground/+B in the air bag
assembly circuits.
DTC Will Set When
Neither of the two air bag assemblies is open.
“Ignition 1” is within the normal operating voltage range.
Once these conditions are me and the voltage at
“Passenger Bag Low” is out of a specified value, DTC
B0018 will set. This test is run once each ignition cycle
and “Continuous Monitoring”.
Action Taken
SRS control unit turns “ON” the “AIR BAG” warning
lamp and sets a diagnostic trouble code.
Page 94 of 4264
9A1-24 RESTRAINT CONTROL SYSTEM
DTC Will Clear When
This malfunction is no longer occurring and the ignition
switch is turned “OFF”.
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 air bag assembly yellow connector behind
glove box compartment.
4.
This test determines whether the malfunction is in
“Passenger Bag High” circuit.
5.
This test determines whether the malfunction is in
“Passenger Bag Low” circuit.
6.
This test determines whether the malfunction is in
“Driver Bag High” circuit.
7.
This test determines whether the malfunction is in
“Driver Bag Low” circuit.
Diagnostic Aids
An intermittent condition is likely to be caused by a short
to ground/+B in the passenger air bag assembly circuit.
Inspect circuits “Passenger Bag High” and “Passenger
Bag Low” carefully for cutting or chafing. If the wiring
pigtail of the passenger air bag assembly is damaged,
the component must be replaced.
DTC B0018 (Flash Code 18) Passenger Airbag Squib Circuit Voltage Range/Performance
Step Action Yes No
1 Was the “SRS Diagnostic System Check” performed? Go to Step 2 Go to the “SRS
Diagnostic System
Check”
2
1. When measurements are requested in this chart use 5-8840-
0285-0 DVM with correct terminal adapter from 5-8840-
0385-0.
2. Ignition switch “OFF.”
3. Ignition switch “ON.”
4. Check the passenger air bag squib circuit for short to voltage,
short to ground and open.
Was a problem found? Go to Step 3
3
1. Ignition switch “OFF.”
2. Disconnect passenger air bag assembly yellow connector
behind the glove box assembly.
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 “ON.”
Is DTC B0018 current? Go to Step 4 Ignition switch
“OFF.”
Replace
passenger air bag
assembly .
Go to Step 8
4
1. Ignition switch “OFF”.
2. Disconnect SRS driver / passenger load tool
3. Measure resistance on SRS control unit harness connector
from terminal “48” to terminal “40” (ground).
Does 5-8840-0285-0 display “OL” (Infinite)? Go to Step 5 Replace SRS
Harness.
Go to Step 8
5 Measure resistance on SRS control unit harness connector from
terminal “47” to terminal “40” (ground).
Does 5-8840-0285-0 display “OL” (Infinite)? Go to Step 6
Replace SRS
Harness.
Go to Step 8
Page 95 of 4264
RESTRAINT CONTROL 9A1-25
Step Action Yes No
6 Measure resistance on SRS control unit harness connector from
terminal “48” to terminal “35” (ignition).
Does 5-8840-0285-0 display “OL” (Infinite)? Go to Step 7
Replace SRS
Harness.
Go to Step 8
7 Measure resistance on SRS control unit harness connector from
terminal “47” to terminal “35” (ignition).
Does 5-8840-0285-0 display “OL” (Infinite)? Go to Chart A Replace SRS
Harness.
Go to Step 8
8
1. Reconnect all components and ensure all component are
properly mounted.
2. Clear diagnostic trouble codes.
Was this step finished? Go to the “SRS
Diagnostic system
Check” Go to Step 8
Page 96 of 4264
9A1-26 RESTRAINT CONTROL SYSTEM
DTC B0022 (Flash Code 22) Driver Airbag Squib Circuit Low Resistance
RTW49JLF000101
Circuit Description
When 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 Bag Low”
terminal “46” is grounded through a current sink and
the driver current source connected to “Driver Bag
High” terminal “45” allows a known amount of current to
flow. By monitoring the voltage difference between
“Driver Bag High” and “Driver Bag Low” the SRS control
unit calculates the combined resistance of the driver ai
r
bag assembly, SRS coil assembly, harness wiring
circuits “Driver Bag High” and “Driver Bag Low” and
connector terminal contact.
Page 97 of 4264
RESTRAINT CONTROL 9A1-27
DTC Will Set When
The combined resistance of the driver air bag
assembly, SRS Coil assembly, harness wiring circuits
“Driver Bag High” and “Driver Bag 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 B0022.
DTC Will Clear When
The ignition switch is turned “OFF.”
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 yellow
connector at the base of the steering column.
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 steering column.
6.
This test determines whether the malfunction is due
to shortening in the wiring.
7.
This test determines whether the malfunction is in
the SRS coil assembly or the driver air bag
assembly.
Diagnostic Aids
An intermittent condition is likely to be caused by a short
between circuit “Driver Bag High” or “Driver Bag Low”
or a malfunctioning shorting clip on the driver air bag
assembly or SRS coil 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. When 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 B0022 (Flash Code 22) Driver Airbag Squib Circuit Low Resistance
Step Action Yes No
1 Perform the “SRS Diagnostic System Check.”
Was the “SRS Diagnostic System Check” performed? Go to Step 2 Go to the “SRS
Diagnostic System
Check”
2
1. Check the driver air bag squib circuit for short to voltage or
short to ground.
2. If the problem found, repair as necessary.
Was a problem found? Verify repair Go to Step 3
3
1. Ignition switch “OFF.”
2. Make sure the SRS coil assembly yellow connector located
at the base of steering column is seated properly.
Is the connector connected properly? Go to Step 4 Seat driver air bag
assembly
connector
properly.
Go to Step 8
4
1. Disconnect and inspect the SRS coil assembly yellow
connector located base of steering column.
2. If ok, reconnect the SRS coil assembly yellow connector.
3. Ignition switch “ON.”
Is DTC B0022 current? Go to Step 5 Go to Step 8
Page 98 of 4264
9A1-28 RESTRAINT CONTROL SYSTEM
Step Action Yes No
5
1. Ignition switch “OFF.”
2. Disconnect SRS coil and passenger air bag assembly, yellow
connector located at the base of steering column and behind
the glove box assembly.
3. Connect SRS driver / passenger load tool 5-8840-2421-0 and
appropriate adapter to SRS coil and passenger air bag
assembly harness connectors.
4. Ignition switch “ON.”
Is DTC B0022 current? Go to Step 6 Go to Step 7
6
1. Ignition switch “OFF.”
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 Bag High” and “Driver Bag Low”,
and SRS control unit connector terminal “45” and “46” to
locate the root cause.
Was a fault found? Replace SRS
harness.
Go to Step 8 Go to Chart A
7
1. Ignition switch “OFF.”
2. Disconnect SRS driver / passenger load tool from driver air
bag assembly harness connector.
3. Connect SRS driver / passenger load tool 5-8840-2421-0 to
the top of steering column connector.
4. Reconnect SRS coil assembly harness connector as the base
of steering column.
5. Ignition switch “ON.”
Is DTC B0022 current? Ignition switch
“off.”
Replace SRS coil
assembly.
Go to Step 8 Ignition switch
“OFF.”
Replace driver air
bag assembly.
Go to Step 8
8
1. Reconnect all components, ensure all component are
properly mounted.
2. Clear diagnostic trouble codes.
Was this step finished? Go to the “SRS
Diagnostic System
Check” Go to Step 8
Page 99 of 4264
RESTRAINT CONTROL 9A1-29
DTC B0024 (Flash Code 24) Driver Airbag Squib Circuit Voltage
Range/Performance
RTW49JLF000101
Circuit Description
When 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 monitors the voltage at “Drive
r
Bag Low” terminal “46” and “Passenger Bag Low”
terminal “47” to detect shorts to ground/+B in the air bag
assembly circuits.
DTC Will Set When
Neither of the two air bag assemblies is open.
“Ignition 1” is within the normal operating voltage range.
This test is run once each ignition cycle and
“Continuous Monitoring”. Once these conditions are
met and the voltage at “Driver Bag Low” is out of a
specified value, DTC B0024 will set.
Action Taken
SRS control unit turns “ON” the “AIR BAG” warning
lamp and sets a diagnostic trouble code.
DTC Will Clear When
The malfunction is no longer occurring and the ignition
is turned “OFF”.
Page 100 of 4264
9A1-30 RESTRAINT CONTROL SYSTEM
DTC Chart Test Description
Number(s) below refer to step 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
SRS coil assembly yellow 2–pin connector at the
base of the steering column.
4.
This test determines whether the malfunction is in
“Driver Bag High” circuit.
5.
This test determines whether the malfunction is in
“Driver Bag Low” circuit.
6.
This test determines whether the malfunction is in
“Driver Bag High” circuit.
7.
This test determines whether the malfunction is in
“Driver Bag Low” circuit.
8.
This test determines whether the malfunction is in
the SRS coil assembly or the driver air bag
assembly.
Diagnostic Aids
An intermittent condition is likely to be caused by a short
to ground/+B in the driver air bag assembly circuit.
Inspect circuits “Driver Bag High” and “Driver Bag Low”
carefully for cutting or chafing.
DTC B0024 (Flash Code 24) Driver Airbag Squib Circuit Voltage Range/Performance
Step Action Yes No
1 Was the “SRS Diagnostic System Check” performed? Go to Step 2 Go to the “SRS
Diagnostic System
Check”
2
1. When measurements are requested in this chart use 5-8840-
0285-0 DVM with correct terminal adapter from 5-8840-
0385-0.
2. Ignition switch “OFF.”
3. Ignition switch “ON.”
4. Check the driver air bag squib circuit for short to voltage or
short to ground and open.
Was a problem found? Go to Step 3
3
1. Ignition switch “OFF.”
2. Disconnect SRS coil assembly yellow connector located at
base of the steering column. leave passenger air bag
assembly connected.
3. Connect SRS driver / passenger load tool 5-8840-2421-0 and
appropriate adapter to SRS coil assembly harness
connector.
4. ignition switch “ON.”
Is DTC B0024 current? Go to Step 4 Go to Step 8
4
1. Ignition switch “OFF.”
2. Disconnect SRS control unit.
3. Disconnect SRS driver / passenger load tool.
4. Measure resistance on SRS control unit harness connector
“45” to terminal “40” (ground).
Does 5-8840-0285-0 display “OL” (infinite)? Go to Step 5 Replace SRS
harness.
Go to Step 9
5 Measure resistance on SRS control unit harness connector from
terminal “46” to terminal “40” (ground).
Does 5-8840-0285-0 display “OL” (infinite)? Go to Step 6
Replace SRS
harness.
Go to Step 9