2004 ISUZU TF SERIES Workshop Manual

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Page 113 of 4264

ISUZU TF SERIES 2004 Workshop Manual RESTRAINT CONTROL 9A1-43

DTC B0057 (Flash Code 57) Passenger Pretensioner Squib Circuit Low Resistance

Step Action Yes No
1 Was the “SRS Diagnostic System Check” performed? Go to Step

RESTRAINT CONTROL 9A1-43

DTC B0057 (Flash Code 57) Passenger Pretensioner Squib Circuit Low Resistance

Step Action Yes No
1 Was 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.
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 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 “ON.”
Is DTC B0057 Current? Go to Step 5 Go to Step 7
5

1. Ignition switch “Off.”

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 “ON.”
Is DTC B0057 current? Go to Step 6 Ignition switch
“Off.”
Replace the
passenger
pretensioner
assembly.
Go to Step 7
6

1. Ignition switch “Off.”

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 “44” and “43” to locate the root cause.
Was 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.
Was this step finished? Repeat the “SRS
Diagnostic System
Check” Go to Step 7

Page 114 of 4264

ISUZU TF SERIES 2004 Workshop Manual 9A1-44 RESTRAINT CONTROL SYSTEM

DTC B0058 (Flash Code 58) Passenger Pretensioner Squib Circuit High
Resistance

RTW49JLF000101

Circuit Description
When the ignition switch is turned “

Page 115 of 4264

ISUZU TF SERIES 2004 Workshop Manual RESTRAINT CONTROL 9A1-45

DTC Will Set When
The combined resistance of the passenger air
pretensioner assembly, harness wiring circuits
“Passenger Pretensioner High” and “Passenger
Pretens

Page 116 of 4264

ISUZU TF SERIES 2004 Workshop Manual 9A1-46 RESTRAINT CONTROL SYSTEM

DTC B0058 (Flash Code 58) Passenger Pretensioner Squib Circuit High Resistance

Step Action Yes No
1 Was the “SRS Diagnostic System Check” Performed? Go t

9A1-46 RESTRAINT CONTROL SYSTEM

DTC B0058 (Flash Code 58) Passenger Pretensioner 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 pretensioner 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 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 pretensioner assembly
yellow connector located at the base of the passenger seat.

2. If ok, reconnect the passenger pretensioner assembly
connector.
3. Ignition switch “ON.”
Is DTC B0058 current? Go to Step 5 Go to Step 7
5

1. Ignition switch “Off.”

2. Disconnect 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 “ON.”
Is DTC B0058 Current? Go to Step 6 Ignition switch
“Off.”
Replace the
passenger
pretensioner
assembly.
Go to Step 7
6

1. Ignition switch “Off.”

2. There has been an increase in the total circuit resistance of
the passenger loop.

3. Use the high resolution ohmmeter mode of the DVM while
checking circuits “Pasenger Pretensioner High” and
“Passenger Pretensioner Low”, and SRS control unit
connector terminal “44” and “43” to locate the root cause.
Was 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.
Was This step finished? Repeat the “SRS
Diagnostic System
Check” Go to Step 7

Page 117 of 4264

ISUZU TF SERIES 2004 Workshop Manual RESTRAINT CONTROL 9A1-47

DTC B0059 (Flash Code 59) Passenger Pretensioner Squib Circuit Voltage
Range/Performance

RTW49JLF000101

Circuit Description
When the ignition switch is turned

Page 118 of 4264

ISUZU TF SERIES 2004 Workshop Manual 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 cir

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

Page 119 of 4264

ISUZU TF SERIES 2004 Workshop Manual 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�

Page 120 of 4264

ISUZU TF SERIES 2004 Workshop Manual 9A1-50 RESTRAINT CONTROL SYSTEM

DTC B0064 (Flash Code 64) Driver Pretensioner Squib Circuit Low Resistance

RTW49JLF000101

Circuit Description
When the ignition switch is turned “ON”

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