Isuzu N-Series. Manual - part 1187

SRS 9B-31

Steering Column

Precautions on Service Work

WARNING:

FOLLOW PRECAUTIONS ABOUT SAFETY WHEN
HANDLING DEPLOYED SRS AIRBAG ASSEMBLY.
METAL SURFACE OF SRS AIRBAG ASSEMBLY
WILL BE VERY HOT DIRECTLY AFTER DEPLOY-
MENT. DO NOT TOUCH IT FOR 30 MINUTES AFTER-
WARD. DO NOT PUT THE DEPLOYED SRS AIRBAG
ASSEMBLY NEAR FLAMMABLE MATERIALS. FAIL-
URE TO FOLLOW THIS MAY CAUSE FIRE OR INJU-
RY. IF THE DEPLOYED SRS AIRBAG ASSEMBLY
NEEDS TO BE MOVED BEFORE IT COOLS DOWN,
WEAR GLOVES AND GRASP THE SRS AIRBAG OR
TRIM COVER TO MOVE.

WARNING:

WHEN CARRYING UNDEPLOYED SRS AIRBAG AS-
SEMBLY, BE SURE TO TURN THE TRIM COVER TO-
WARD OUTSIDE TO REDUCE THE POSSIBILITY OF
INJURY IN CASE OF AIRBAG DEPLOYMENT. ALSO,
NEVER GRASP THE HARNESS OR CONNECTOR
OF SRS AIRBAG TO CARRY IT.

WHEN STORING UNDEPLOYED SRS AIRBAG AS-
SEMBLY, OR LEAVE IT UNATTENDED ON WORK-
BENCH OR SOMEWHERE ELSE, BE SURE TO TURN
THE TRIM COVER UPWARD TO REDUCE THE POS-
SIBILITY OF INJURY IN CASE OF AIRBAG DEPLOY-
MENT.

Caution:

If deployment occurs, replace the coil assembly.

Removal

1. Stop the function of SRS. (Refer to “Procedure to

stop the function of SRS”.)

2. Loosen the mounting bolt from the back of steering

wheel using TORX

®

 driver or equivalent to remove

SRS airbag.

3. Disconnect the 2-pole connector (yellow) and horn

harness located in the back of SRS airbag and re-
move the SRS airbag.

4. Remove the nut which installs steering wheel.

5. Put the setting marks on steering wheel and shaft

in order to reassemble parts to the original position.

N9A0044E

N9A0050E

9B-32 SRS

Legend

1. Setting mark

6. Set tires in straight position before removing steer-

ing wheel. Install the steering wheel puller (5-8840-
2035-0) to steering wheel and remove it.

7. After removing the cover of harness through hole,

put wire into wheel to remove it.

Caution:

Steering shaft has function as shock absorber. Do not
apply a force in the direction of steering wheel shaft.
When removing the steering wheel, use special tool.

8. Remove the steering cowl.
9. Disconnect SRS harness connector (yellow) and

combination switch harness connector located in
the lower portion of steering column.

Legend

1. Connector (yellow)

2. SRS coil harness (yellow)

10. Remove the combination switch assembly togeth-

er with SRS coil.

Caution:

Combination switch contains SRS coil assembly. When
replacing SRS coil assembly, always replace the combi-
nation switch assembly as a unit.

11. Make a small cut on screw of steering lock assem-

bly using a saw, loosen the screw, remove the
snap ring, and then remove the steering lock as-
sembly.

Legend

1. Snap ring
2. Screw

12. Remove the sight glass, put alignment marks on

steering shaft and universal joint yoke, and then re-
move tilt control.

1

N9A0051E

1

2

N9A0040E

1

2

2

N9A0054E

N9A0055E

SRS 9B-33

13. Pull out the steering shaft from column and remove

the steering column.
Put alignment marks on the spline shaft and steer-
ing shaft and then disassemble them.

14. Clean disassembled parts and check them.

Steering shaft

• Check for bent.
• Check the universal joint yoke for crack or de-

formation.

• Check the joint bearing for play.

Caution:

Universal joint is non-disassembled part.

Spline shaft

• Check for play in rotational direction against

steering shaft.

• Check the joint for play.
• Check the boot for breakage or deterioration.

Installation

1. Install the steering column.
2. By aligning the alignment marks put at disassem-

bly, assemble the steering shaft to install.
By aligning the alignment marks put at disassem-
bly, install the steering shaft to steering unit and
tighten the key bolt to the specified torque.

Tighten:
Bolt to 25 

± 5 N⋅m (2.5 ± 0.5 kg⋅m / 18.4 ± 3.7 lb⋅ft)

Caution:

Align the yoke so that the universal mounting bolt comes
through the groove of the shaft of steering unit, angle
gear box or transfer gear. The mounting bolt must be in-
serted and tightened after yoke is positioned. (Do not in-
stall the yoke after the bolt is temporarily tightened.)
After yoke is secured, check that the serration portion is
not seen.

N9A0056E

N9A0057E

N9A0058E

9B-34 SRS

Legend

1. Serration shaft
2. Bolt hole
3. Yoke
4. Yoke is not inserted sufficiently if serration can

be seen.

3. Tighten the nut on bottom of tilt control, which in-

stalls steering column support bracket, and nut on
outside of tilt control to the specified torque.

Tighten:
Nut (bottom) to 13.5 

± 1.5 N⋅m (1.4 ± 0.2 kg⋅m / 10.0 ±

1.1 lb

⋅ft)

Tighten:
Nut (outside) to 32.5 

± 2.5 N⋅m (3.3 ± 0.3 kg⋅m / 24.0 ±

1.8 lb

⋅ft)

Install the lever to lock position and tighten the nut
to the specified torque.

Tighten:
Nut to 22 N

⋅m (2.2 kg⋅m / 16.2 lb⋅ft)

Legend

1. Steering column support bracket mounting nut
2. Nut

4. Install the steering lock assembly and insert the

snap ring securely.
Use new screw at this time.

N9A0059E

N9A0055E

1

2

N9A0060E

1

2

2

N9A0054E