Lifan 620. Manual — part 67

1. Check circuit as shown in Fig. 4-118

Deficiency of the two horns

1. Fuse blown 2. Deficiency of horn relay

3. Deficiency of horn switch 4. Deficiency of horn

5. Fault in clock spring 6. Fault in wiring

Deficiency of one horn

1. Deficiency of horn 2. Fault in wiring

Horn keeps chirping

1. Deficiency of horn relay 2. Deficiency of horn switch

3. Fault in clock spring 4. Fault in wiring

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Chapter V Air Bag

Section I

Composition, Principle and Safety Rules for Maintenance

I. Composition & layout of air bag system

Fig. 5-1

The air bag ECU can keep in operation for over 100ms under the circumstances that the battery
voltage drops too low or the power supply disconnects because of collision. Two models of the air
bag are involved in the LF7162: the two circuits and four circuits which must work simultaneously
with the front pre-tensioned safety belt.

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2. Driver air bag module
The un-removable driver air bag module, containing gas generator, bag, ornamental cap and a
series of auxiliary components, is installed in the central ornamental cap of the steering wheel, as
shown in Fig. 5-2.

The working principle of air bag clock spring: The installation housing of the clock spring is fixed on
the steering column, and the upper part of the clock spring turn plate is inserted into the steering
wheel, and the swirly cable is installed between the turnplate and installation housing. When the
steering wheel turns left or right, the clock spring turnplate will turn simultaneously with the
steering wheel, turning the output end of the cable and stretching or tightening the swirly cable.
For this reason, the harness is prevented from being wound upon the steering column. Beyond
that, the continuity of the harness and the connection of the electronic signal are assured. Thus,
the harness of the clock spring is also the bridge for supplying electricity from the vehicle body to
the related functional components of steering wheel.

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4. Front passenger air bag module
The front passenger air bag module, comprising of gas generator, bag and a series of auxiliary
components, etc, is installed above the sundries box of dash board, as shown in Fig. 5-4.

Fig. 5-5

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