Isuzu KB P190. Manual - part 75

POWER-ASSISTED STEERING SYSTEM 3B-39 

Combination Switch 

Combination Switch and Associated Parts 

 

 
 
 
 
 
 
 

 

 

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Legend 
(1)  Steering Column Cover 
(2) Steering Wheel 
(3)  Inflator Module or Horn Pad 

 

 
(4)  Combination Switch and SRS Coil Assembly 
(5)  Instrument Panel Lower Cover 
(6)  Driver Knee Bolster (reinforcement) 
 

 

Removal 

1.  Turn the steering wheel so that the vehicle's wheels

are pointing straight ahead. 

2.  Turn the ignition switch to "LOCK". 
3.  Disconnect the battery "-" terminal cable, and wait at

least 5 minutes (with SRS air bag). 

4.  Disconnect the yellow 2-way SRS connector located

under the steering column (with SRS air bag). 

 

CAUTION: The wheels of the vehicle must be 
straight ahead and the steering column in the
"LOCK" position before disconnecting the steering
wheel. Failure to do so will cause the coil assembly
to lose its centering which will cause damage to the 
coil assembly. (with SRS air bag) 

5.  Remove the engine hood opening lever, then 

remove instrument panel lower cover. 

6.  Remove the driver knee bolster (reinforcement). 

3B-40 POWER-ASSISTED STEERING SYSTEM 

7.  Disable the SRS (Refer to "Disabling the SRS" in

this section) (with SRS air bag). 

8.  Check the holes on both sides of the steering cover.

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9.  Check the position of the pins in their holes. Push 

the pin in the direction of the arrow (with SRS air
bag). 

 

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10.  Push the four pins with a φ 5~6 mm (0.20~0.24 in)

bar (with SRS air bag). 

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11. Cancel the lock to release the four pins (with SRS 

air bag). 

12. Loosen the horn pad fixing screw at the rear of the 

steering wheel (without SRS air bag). 

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POWER-ASSISTED STEERING SYSTEM 3B-41 

13. Disconnect the SRS air bag connector (1) and horn 

lead connector (2) located behind the air bag
assembly and remove the air bag assembly (with 
SRS air bag). 

 

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14. Remove the horn pad and the horn leads at the

center of the wheel (without SRS air bag). 

NOTE: It should be removed first from the bottom
spokes. 

 

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WARNING: THE INFLATOR MODULE SHOULD
ALWAYS BE CARRIED WITH THE COVER AWAY
FROM YOUR BODY AND SHOULD ALWAYS BE
LAID ON A FLAT SURFACE WITH THE COVER SIDE 
UP. THIS IS NECESSARY BECAUSE A FREE SPACE
IS PROVIDED TO ALLOW THE AIR CUSHION TO
EXPAND IN THE UNLIKELY EVENT OF
ACCIDENTAL DEPLOYMENT. OTHERWISE,
PERSONAL INJURY MAY RESULT (with SRS air
bag). 

 

430R300007

15. Apply a setting mark (1) across the steering wheel 

and shaft so parts can be reassembled in their 
original position. Move the front wheels to the 
straight ahead position, then use steering wheel 
remover 5-8521-0016-0 (2) to remove the steering 
wheel. 

 

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CAUTION: Never apply force to the steering wheel in 
the direction of the shaft by using a hammer or 
other impact tools in an attempt to remove the
steering wheel. The steering shaft is designed as an
energy absorbing unit. 

 

3B-42 POWER-ASSISTED STEERING SYSTEM 

CAUTION: When turning the SRS coil fully
counterclockwise, stop turning if resistance is felt.
Further forced turning may damage the cable in the 
SRS coil (with SRS air bag). 

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Legend 

(1) Neutral mark 
 

 

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16.  Remove steering column cover. 
17. Disconnect the wiring harness connectors located

under the steering column then remove combination
switch and SRS coil assembly (with SRS air bag). 

NOTE: The SRS coil is a part of the combination switch
assembly, which cannot be replaced separately.
Therefore, be sure not to remove the SRS coil from the
combination switch assembly (with SRS air bag). 

 

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Installation 

1.  Install the combination switch assembly with SRS

coil (with SRS air bag). 

2.  Turn the SRS coil fully counterclockwise, return

about 3 turns and align the neutral mark (with SRS 
air bag). 

 

 

 
3.  Connect the wiring harness connectors located at 

the base of steering column. 

4.  Install the air conditioning lower duct. 
5.  Install the steering column cover. 
CAUTION: When installing the steering column 
cover, be sure to wire (through each harness) as
illustrated so that the harness starter switch,
combination switch and SRS coil will not catch 
wiring (with SRS air bag). 

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