steering ISUZU TF SERIES 2004 Owner's Guide

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

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

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

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

RESTRAINT CONTROL 9A1-33

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
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 B0026.

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 at the base of the steering column.
4.
This test checks for proper contact and/or corrosion
of the connector terminals at the base of steering
column.
5.
This test isolate the malfunction to one side of the
SRS coil assembly yellow connector located at the
base of the steering column.
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 SRS coil assembly or the driver air bag
assembly.

Diagnostic Aids
An intermittent condition is likely to be caused by a poor
connection at terminals “1” and “2” of the SRS coil
connector at the base of the steering column, terminal
“1” and “2” of the driver air bag assembly connector at
the top of the steering column, SRS control unit
terminals “45” and “46” or a poor wire to terminal
connection in circuit “Driver Bag High” or “Driver Bag
Low” The test for this diagnostic trouble code is onl
y
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 B0026 (Flash Code 26) Driver Airbag Squib Circuit High Resistance

Step Action Yes No
1 Perform the “SRS Diagnostic System Check”.
Was the “SRS Diagnostic System Check” performed? Go to Step 2 Repeat the “SRS
Diagnostic System
Check”
2

1. Check the driver 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. Disconnect SRS coil assembly yellow connector located at
base of steering column is seated properly.
Is the connector connected properly? Go to Step 4 Seat SRS coil
assembly
connector
properly.
Go to Step 8

9A1-34 RESTRAINT CONTROL SYSTEM

Step Action Yes No
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 B0026 current? Go to Step 5 Go to Step 8
5

1. Ignition switch “OFF.”

2. Disconnect SRS coil and passenger air bag assembly, yellow
2–pin 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 B0026 current? Go to Step 6 Go to Step 7
6

1. Ignition switch “Off. “

2. There has been a increase 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 SRS coil
assembly harness connector.
3. Connect SRS driver / passenger load tool 5-8840-2421-0 on
the top of steering column.

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

5. Ignition switch “ON.”
Is DTC B0026 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? Repeat the “SRS
Diagnostic System
Check” Go to Step 8

9A1-52 RESTRAINT CONTROL SYSTEM

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 B0064 current? Go to Step 5 Go to Step 8
5

1. Ignition switch “OFF.”

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 B0064 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 Pretensioner High” and “Driver
Pretensioner Low”, and SRS control unit connector terminal
“42” and “41” to locate the root cause.
Was a fault found? Replace SRS
harness or repair
chassis harness.
Go to Step 8 Go to Chart A
7

1. Ignition switch “OFF.”

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 “ON.”
Is DTC B0064 current? Ignition switch
“off.”
Replace SRS coil
assembly.
Go to Step 8 Ignition switch
“OFF.”
Replace driver
pretensioner
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

4C1-14 FRONT WHEEL DRIVE
FRONT DRIVE AXLE ASSEMBLY
Front Drive Axle Assembly and Associated Parts


RTW440LF000501

Legend
1. Propeller Shaft
2. Front Axle Case Assembly and Front Drive
Shaft Assembly
3. Washer

4. Mounting Bolt
5. Tie-rod End ; Steering Unit
6. Knuckle and Back Plate
7. Hub and Disc Assembly
8. Suspension Crossmember

FRONT WHEEL DRIVE 4C1-15

Removal
1. Jack up the vehicle and support it using jack stand.
2. Remove the tire and wheel.
3. Remove the stone guard.
4. Remove the brake caliper fixing bolt and hang the caliper.
Refer to Disc Brakes in Brake section.
5. Remove the antilock brake system speed sensor.
Refer to Front Wheel Speed Sensor in Brake section.
6. Remove the hub and disc assembly.
Refer to Front Hub and Disc in this section.
7. Remove the propeller shaft, refer to Front Propeller Shaft in
this section.
8. Loosen the height control arm of the torsion bar, then
remove the torsion bar from lower control arm.
Refer to Torsion Bar in Suspension section.
9. Remove the suspension crossmember.
10. Remove the lower nut (1) of the stabilizer link.
11. Remove the lower bolt and nut (2) of the shock absorber.

12. Remove the tie-rod end from the knuckle.
Refer to Power Steering Unit in Steering Section.
13. Disconnect the breather hose of the front axle.
14. Disconnect the actuator connector. (With shift on the fly)
15. Remove the bolts and nuts of the lower control arm (Frame
side), then disconnect the lower control arm from frame.
16. Disconnect between the right side upper control arm and
the knuckle, then remove the knuckle with lower control
arm.
CAUTION :
When removing the knuckle, be careful not to damage the
oil seal inside of the knuckle.