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Lifan 620. Manual - part 66

3. Fault table, Table 4-23

Table 4-23

Fault

Cause

Fault

Cause

Totally can not work (can not

self-check)

1.Fault in power circuit

2.Fault in reverse radar

Buzzer does not

work (can

self-check)

1. Fault in buzzer drive

circuit

2. Fault in reverse radar

Sometimes LCD indicator

does not work (can

self-check)

1.Fault in indicator drive

circuit

2.Fault in reverse radar

Open circuit or

freezing indicated

in self-checking

1. Fault in sensor or

sensor influenced by

external environment

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①

Disconnect instrument cluster connector.

②

After starting engine, take reverse gear, check whether square signal output exists in BCM

(1-19) with oscillograph. If it is normal, proceed to the next step; if not, check whether BCM
controller and probe are damaged.
2) Check wire harness or connector
①

Disconnect BCM vehicle body controller connector

②

Disconnect instrument cluster connector

③

Check the impedance of BCM vehicle controller sleeve BCM (1-19) and instrument cluster A10,

②

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Section IX Power Supply and Other Electrical System

I. Overview

This section covers battery, power distribution network, rear defrost system, electric horn system
and electronic clock.

II. Battery

III. Power switch system

1. If the fuse is blown, renew it after clearing the related fault causes.
2. Employ the fuse with the designated specifications, no fuse exceeding the given specifications
can be accepted.
3. Don’t install the fuse obliquely, ensure it to install correctly in the fuse box.
Relay mainly includes: normally open, normally closed and the mixed type.

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IV. The rear defrosting system includes:

rear window glass heating net, rear

window defroster relay, rear window defroster switch: in combination with the
emergency light switch, inner integration on the air conditioner controller (for
electrical air conditioning)

1. Fault table, Table 4-24.

Table 4-24

Fault Cause

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