Abs Fault Diagnosis And Troubleshooting; Check Abs Warning Lamp; Regular Fault Table; Dtc Read And Deletion Without Fault Diagnostic Instrument - Lifan 620 Maintenance Manual

Note: If the harness is twisted off or fractured for tight pull, it must be replaced with new parts.
Especially when vehicle is moving, the sensor will move up and down, which may cause
instantaneous open/short circuit. As a result, sensor signal check must be carried out when
vehicle is moving.
2. When overheating or supercooling may be the main reason:
Heat the possibly faulted part with a blower; check for cold welding phenomenon with a cold spray.
3. When overlarge contact resistance of power supply circuit may be the main reason:
Open all electrical switches, including the headlight and rear defrosting lamp. If fault does not
show again, it can only be diagnosed and repaired when it comes out next time. Generally the
occasional dynamic fault will only get worse, not better.
IV. ABS Fault Diagnosis and Troubleshooting

1. Check ABS warning lamp

Check if ABS warning lamp is turned on in the following ways
(1) Turn the vehicle key to connect the circuit, and then ABS warning lamp is turned on and then
turned off after 3 seconds.
(2) Fault exists if not the same with the situation in (1); check the DTC and refer to DTC Check
Table.
(3) Refer to No DTC Fault Table if the warning lamp can not be turned on.
2. Regular Fault Table (Table 3-6).
Location Reason
Brake pipe installation error
Vehicle Oil leakage of brake gear
harness
Wire installation error
Exhaust fault
Motor Motor fault
ECU power cord fault
Control valve power cord fault
ECU ECU poor grounding
ECU fault
Motor power cord fault
Sensor open/short circuit
Wheel
speed Gear ring fault
sensor
Sensor disturbance fault
Air gap fault

3. DTC read and deletion without fault diagnostic instrument

(1) Purpose and condition of DTC read without diagnostic instrument
If no diagnostic instrument is available, ABS fault condition can be indicated and DTC can be read
through ABS warning lamp, so as to confirm and eliminate the fault. If the DTC is a 2 digital code,
refer to the number in the bracket of DTC Table in Section 24.
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Table 3-6
Structure
Wheel locked, braking deviation
ABS and EBD abnormal start
Unable to brake
ABS performance decreased
ABS unable to start
ABS and EBD unable to start
ABS and EBD unable to start
ABS and EBD unable to start
ABS and EBD unable to start
ABS unable to start
One fault: ABS unable to start
Two faults: ABS/EBD unable to start
One fault: ABS wrong start
Two faults: ABS and EBD unable to start
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Warning lamp
ABS EBD
Off Off
On Off
On On
On Off
On Off
On On
On Off
On On