2004 ISUZU TF SERIES display

RESTRAINT CONTROL 9A1-13

Chart B “AIR BAG” warning lamp comes “ON” Steady

Step Action Yes No
1

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. Connect scan tool to data link connector, follow directions as
given in the scan tool instruction MANUAL.

4. Ignition switch “ON.”

5. Request SRS diagnostic trouble code display.
Dose scan tool indicate “No Data Received”? Go to Step 2 Go to Step 3
2

1. Ignition switch “OFF”.

2. Inspect SRS control unit harness connector connection to
SRS control unit.
Is it securely connected to the SRS control unit? Ignition switch
“OFF.”
Replace SRS
control unit.
Go to Step 5 Connect SRS
control unit
securely to de–
activate shorting
clip in SRS control
unit harness
connector.
Go to Step 5
3 Using scan tool, request SRS data list.
Is “ignition” more than 9 volts? Go to Step 4 Ignition switch
“OFF.”
Replace SRS
control unit.
Go to Step 5
4

1. Ignition switch “OFF.”

2. Disconnect SRS coil and passenger air bag assemblies.
yellow connector located at base of steering column and
behind the glove box assembly.
Disconnect SRS control unit.

3. Disconnect the connector of “SRS Warning Lamp” of
instrument cluster.

4. Measure resistance from SRS control unit harness connector
terminal “40” to ground.
Does 5-8840-0285-0 DVM display “OL” (Infinite)? Go to Chart A Replace SRS
harness.
Go to Step 5
5 Reconnect all SRS components, ensure all components are
properly mounted.
Was this step finished? Repeat the “SRS
Diagnostic System
Check” Go to Step 5

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

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

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

RESTRAINT CONTROL 9A1-31

Step Action Yes No
6 Measure resistance on SRS control unit harness connector from
terminal “45” to terminal “35” (ignition).
Does 5-8840-0285-0 display “OL” (infinite)? Go to Step 7
Replace SRS
harness.
Go to Step 9
7 Measure resistance on SRS control unit harness connector from
terminal “46” to terminal “35” (ignition).
Does 5-8840-0285-0 display “OL” (infinite)? Go to Chart A
Replace SRS
harness.
Go to Step 9
8

1. Ignition switch “OFF.”

2. Disconnect SRS driver / passenger load tool 5-8840-2421-0
from SRS coil assembly harness connector.

3. Connect SRS driver / passenger load tool 5-8840-2421-0 and
appropriate adapter to driver air bag assembly harness
connector. located top of the steering column connector.

4. Reconnect SRS coil assembly harness connector as the base
of steering column.

5. Ignition switch “ON.”
Is DTC B0024 current? Ignition switch
“OFF.”
Replace SRS coil
assembly.
Go to Step 9 Ignition switch
“OFF.”
Replace driver air
bag assembly.
Go to Step 9
9

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 9

9A1-48 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 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/+B in the passenger pretensioner assembly
circuit. Inspect circuits “Passenger Pretensioner High”
and “Passenger Pretensioner Low” carefully for cutting
or chafing. If the wiring pigtail of the passenger
pretensioner assembly is damaged, the component
must be replaced. A careful inspection of “Passenger
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 B0059 (Flash Code 59) Passenger Pretensioner 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 pretensioner 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 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 “ON.”
Is DTC B0059 current? Go to Step 4 Ignition switch
“OFF.”
Replace
passenger
pretensioner
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 “44” 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 “43” to terminal “40” (ground).
Does 5-8840-0285-0 display “OL” (Infinite)? Go to Step 6
Replace SRS
Harness.
Go to Step 8

RESTRAINT CONTROL 9A1-49

Step Action Yes No
6 Measure resistance on SRS control unit harness connector from
terminal “44” 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 “43” 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

RESTRAINT CONTROL 9A1-57

DTC Will Clear When
The malfunction is no longer occurring and the ignition
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 SRS control unit is
malfunctioning
3.
This test isolates the malfunction to one side of the
pretensioner assembly yellow connector at the base
of the driver seat.
4.
This test determines whether the malfunction is in
“Driver Pretensioner High” circuit.
5.
This test determines whether the malfunction is in
“Driver Pretensioner Low” circuit.
6.
This test determines whether the malfunction is in
“Driver Pretensioner High” circuit.
7.
This test determines whether the malfunction is in
“Driver Pretensioner Low” circuit.
8.
This test determines whether the malfunction is in
the driver pretensioner assembly.
Diagnostic Aids
An intermittent condition is likely to be caused by a short
to ground/+B in the driver pretensioner circuit. Inspect
circuits “Driver Pretensioner High” and “Driver
Pretensioner Low” carefully for cutting or chafing.


DTC B0066 (Flash Code 66) Driver Pretensioner 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 pretensioner squib circuit for short to
voltage, short to ground and open.
Was a problem found? Verify repair Go to Step 3
3

1. Ignition switch “OFF.”

2. Disconnect pretensioner yellow connector located at base of
the driver seat. leave passenger pretensioner assembly
connected.

3. Connect SRS driver / passenger load tool 5-8840-2421-0 and
appropriate adapter to pretensioner harness connector.

4. ignition switch “ON.”
Is DTC B0066 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
“42” to terminal “40” (ground).
Does 5-8840-0285-0 display “OL” (infinite)? Go to Step 5 Replace SRS
harness or repair
chassis harness.
Go to Step 9