How to troubleshoot the fault displayed on the dashboard of the road sweeper?
Time:2019-08-02
Views:2336
How to eliminate the fault on the dashboard of the road sweeper?
1, the failure of the control system to work properly
The meter displays "Master communication failure"
Detect the road cleaning vehicle main control board LS2 socket (24 feet, white) 3rd foot 15#, 4th foot 30# power line (red and white) whether there is voltage input (24~30W);
Detect the road cleaning vehicle main control board LS2 socket (24 feet, white), the 19th foot ground (brown) is well grounded;
Detecting the road sweeper main control board LS2 socket (24 feet, white) 24th communication line (light blue) and meter C1 socket (8 feet, black) 4th communication line (light blue) Good mutual connection, whether there is short circuit or grounding;
The meter displays "Drive communication failure"
Detection drive board JPC socket (6 feet, white) 3rd foot communication line (light blue red) and meter C1 socket (8 feet in total, black) 4th foot communication line (light blue red) is in good contact, yes There is a break or grounding phenomenon;
The meter displays "Drive board module overheating"
If the temperature inside the drive board is too high, stop driving first, and wait for the temperature inside the drive board to drop to normal.
Check whether the lamp is connected more than the set power of the sweeper. The standard power of the main vehicle is 21W×2+5W on one side and 21W on one side of the trailer.
2, the garbage sweeper relay drive output failure
The meter shows "intermittent wiper failure"
Detect whether the garbage sweeper relay J7 (double garbage sweeper relay, a total of 5 feet) has been damaged;
Whether fuse F5-2 has been blown;
Driver board JPG socket (a total of 10 feet, black) 4th foot intermittent wiper output line (brown light blue) to the wiper motor between the wire harness is grounded.
The meter displays "Air conditioning power failure"
Detecting whether the garbage sweeper relay J3 has been damaged;
Whether fuse F5-3 has been blown;
Driver board JPG socket (a total of 10 feet, black) 1st foot air conditioning power output line (black and red) to the wire harness between the sweeping car fan is iron.
The meter shows "high beam failure"
Check if the garbage sweeper relays J4, J14 have been damaged;
Whether the fuses F5-5 and F6-4 have been blown;
Driver board JPG socket (10 feet in total, black) 5th foot and JPI socket (6 feet in total, white) The 2nd and 3rd foot high beam output lines to the wiring harness between the bulbs are grounded.
The meter displays "position light failure"
Detect whether the garbage sweeper relays J9 and J10 have been damaged;
Whether fuses F6-1, F6-2 have been blown;
Driver board JPG socket (10 feet in total, black) 7th foot and JPI socket (6 feet in total, white) 1st position and other output lines to the wiring harness between the bulbs.
The meter displays "Front fog light failure"
Detecting whether the garbage sweeper relay J5 has been damaged;
Whether fuse F6-3 has been blown;
Driver board JPG socket (10 feet in total, black) 9th foot front fog light output line (gray black) to the wire harness between the bulbs.
The meter shows "low beam failure"
Check if the garbage sweeper relays J8 and J13 have been damaged;
Whether fuses F5-4, F6-5 have been blown;
Driver board JPG socket (10 feet in total, black) 3rd foot and JPI socket (6 feet in total, white) The 6th low beam output line to the wiring harness between the bulbs is grounded.
3, small and medium power output failure
The meter displays "Brake light failure"
Brake light bulb is damaged.
The brake light output line is broken or grounded.
Driver board JPH socket (8 feet in total, white) 6th foot brake light output line (black and red) connected to 30# power supply, check that there are several light bulbs on, and more to remove. If there is no light bulb, check the output line to the light bulb for disconnection or grounding.
The meter shows "reverse light failure"
The backup lamp bulb is damaged.
The reverse light output line is shorted or grounded.
Give the drive board JPH socket (8 feet in total, white). The 8th foot reversing light output line (black and white) is connected to the 30# power supply. Check that there are several light bulbs on the light, and remove more and less. If there is no light bulb, check the output line to the light bulb for disconnection or grounding.
The meter displays "Front fog light failure"
The rear fog light bulb is damaged.
The rear fog light output line is broken or grounded.
Give the driver board socket 7 foot rear fog light output line (yellow green white) to connect 30# power supply, check that there are several light bulbs on, and remove more and less. If there is no light bulb, check the output line to the light bulb for disconnection or grounding.
The meter shows "Neutral valve failure"
The neutral valve is damaged;
In the event of a fault, check the driver board JPF socket (12 feet, white). The 8th foot valve output line (black, green and purple) to the solenoid valve is grounded.
The meter shows "wheel valve fault"
Open the wheel difference switch, the meter will immediately display the "wheel valve fault", then check the driver board JPF socket (12 feet, white), the 10th wheel differential valve output line (black green red) to the wheel valve There is a grounding phenomenon.
Turn on the switch, and after about eight seconds, the “wheel valve fault” will be displayed after the meter and the wheel in-position indicator will flash. At this point, use a ground wire to connect to the wheel differential switch plug.
If the faulty meter indicates that the fault is removed and the wheel in-position indicator is steady on, it indicates that the wheel-to-position switch is damaged.
If the fault is not eliminated, check the drive board JPE socket (28 feet, black) 12P 3rd wheel differential in-position signal line (brown light blue red) to the connection between the wheel-to-wheel switch is good.
The meter shows "Axis valve fault"
Open the shaft difference switch, the meter will immediately display the "axis difference valve fault", then check the drive board JPF socket (12 feet, white) 9th foot shaft valve output line (black green white) to the shaft difference valve Is there a grounding phenomenon?
Turn on the shaft misalignment switch, the instrument will display “Axis Difference Valve Fault” after eight seconds and the shaft difference in-position indicator will flash. Connect the ground wire to the shaft difference in place switch plug;
If the faulty meter indicates that the fault is eliminated and the wheel difference in-position indicator is always on, it indicates that the shaft difference in-position switch is damaged;
If the faulty meter shows that the fault is eliminated and the all-drive in-position indicator is always on, it indicates that the all-drive in-position switch is damaged;
If the fault is not eliminated, check the JPE socket of the driver board (28 feet in total, black). The 12P pin 10 is fully connected to the signal line (brown light blue gray) to the connection between the all-drive in-position switches.
The meter shows "power take-off valve failure"
Open the power take-off switch, the meter will immediately display "power take-off fault", then check the drive board JPF socket (12 feet, white) 11th foot power take-off valve output line (black green yellow) to the power take-off Is there a grounding phenomenon between the valves?
Turn on the power take-off switch, the meter will display “power take-off valve fault” after eight seconds and the power take-off indicator will flash. Connect the ground wire to the power take-off in place switch plug;
If the faulty meter indicates that the fault is eliminated and the power take-off indicator is steady on, it indicates that the power take-off switch is damaged;
If the fault is not eliminated, check the driver board JPE socket (28 feet in total, black). 12P 9th foot power take-off signal line (brown light blue) to the power take-off switch is good.
4, sensor failure
The meter displays "Oil level sensor failure"
Connect the signal line of the oil level sensor plug directly to the iron to see if the instrument malfunction is removed.
If the fault is not removed, check whether there is a disconnection between the signal line (brown black) of the C2 socket of the meter and the sensor plug;
If the displayed fault is removed, re-process the ground wire at the sensor plug end to ensure a good connection, otherwise replace the sensor.
Cut the C2 plug 1 pin signal line, connect a resistor of about 100 ohms in series, and connect the other end of the resistor directly to the ground. If the meter is connected well, the meter will indicate the center scale, indicating that the meter is good. In this case, check the sensor and signal. Line connection.
The meter displays "Brake pressure 1 fault"
Connect the brake air pressure 1 sensor plug end signal line directly to see if the instrument fault is removed.
If the fault has not been removed, check whether there is a disconnection between the 2 pin signal line (brown light blue) of the meter C2 socket and the sensor plug;
If the fault displayed by the meter is removed, re-process the ground wire at the sensor plug end to ensure a good connection, otherwise replace the sensor.
Cut the 2 pin signal line of C2 plug, connect a resistor of about 100 ohms in series, and connect the other end of the resistor directly to the ground. If the meter is connected well, the meter will indicate the center scale, indicating that the meter is good. In this case, check the sensor and signal. Line connection.
The meter displays "Brake air pressure 2 fault"
Connect the brake air pressure 2 sensor plug end signal line directly to see if the instrument fault is removed.
If the fault has not been removed, check the C2 socket 3 pin signal line (brown purple) to the sensor plug for disconnection;
If the fault displayed by the sweeper‘s instrument is removed, re-process the ground wire at the sensor plug end to ensure a good connection, otherwise replace the sensor.
Cut the C2 plug 3 pin signal line, connect a resistor of about 100 ohms in series, and connect the other end of the resistor directly to the ground. If the meter is connected well, the meter will indicate the center scale, indicating that the meter is good. In this case, check the sensor and signal. Line connection.
The meter shows "oil pressure failure"
Connect the signal line of the oil pressure sensor plug end directly to see if the instrument fault is removed.
If the fault has not been removed, check whether there is a disconnection between the 4-pin signal line (brown) of the C2 socket of the meter and the sensor plug;
If the fault displayed by the sweeper‘s meter is removed, re-treat the ground wire at the sensor plug end to ensure a good connection, otherwise replace the sensor.
Cut the 4 pin signal line of C2 plug, connect a resistor of about 100 ohms in series, and connect the other end of the resistor directly to the ground. If the meter is connected well, the meter will indicate the center scale, indicating that the meter is good. In this case, check the sensor and signal. Line connection.
Euro 3 emission vehicles, namely HOWO8 and HOWO9 vehicles, the engine pressure signal is sent by the road sweeper engine ECU to the instrument or meter through the CAN line to directly collect the sensor signal; the oil pressure data sent by the CAN line is preferentially combined with the sensor to collect the signal, ie: if CAN Simultaneously send data to the meter with the sensor, the meter only accepts CAN signal data.
The meter displays "speed signal failure"
If the instrument does not detect the road sweeper engine speed signal when the road sweeper engine is working, the meter will display “speed signal fault”. In the event of a fault, cut off the 9-pin (light blue purple) speed signal line of the C2 plug of the instrument and quickly jog the ground. If the tachometer has a swing phenomenon, the meter is good. In this case, check the C2 socket of the instrument. Whether the line (light blue purple black) is disconnected or grounded between the "W" points of the engine speed signal output end of the road sweeper, if it is normal, it is detected whether the signal output of the generator is good.
Euro 3 emission vehicles, namely HOWO8 and HOWO9 vehicles, the engine pressure signal is sent by the road sweeper engine ECU to the instrument or meter through the CAN line to directly collect the sensor signal; the oil pressure data sent by the CAN line is preferentially combined with the sensor to collect the signal, ie: if CAN Simultaneously send data to the meter with the sensor, the meter only accepts CAN signal data.
5, other instruments display alarm (special models)
The meter shows "Oil filter blocked"
The oil filter blocks the signal line to ground and the meter displays "Oil filter blockage".
Unplug the oil filter to block the sensor plug and measure the short between the two pins of the sensor.
Replace the filter if shorted;
If the road sweeper main control board LS3 socket is not checked, the 7th foot filter signal line to the sensor where the wiring harness is short-circuited to the ground.
The meter shows "Diesel filter blocked"
The diesel filter blocks the signal line to ground and the meter displays "Diesel filter blockage".
Unplug the diesel filter to block the sensor plug and measure the short between the two pins of the sensor.
Replace the filter if shorted;
If the road sweeper main control board LS3 socket is not checked, the signal line between the 8th foot filter and the sensor is short-circuited to the ground.
The meter shows "Please stop the road sweeper engine"
In the case of the road sweeper engine work, the electric key (15# power supply) cannot be turned off, otherwise the meter displays “Please listen to the road sweeper engine”
In the event of a fault, check if the power line (black and red) of pin 7 of the C1 socket of the instrument C1 has a voltage of about 24V;
If not, check if the driver‘s board JPC socket 6 pin 15# power cord (black and red) has 24V power supply;
If not, check the 15# power cord (black) and ignition key switch of the D1 power cord plug.
The meter displays "F4-2 fuse failure"
Replace the F4-2 fuse and check whether the reverse lamp, brake light, rear fog lamp, work lamp, and valve output are short-circuited to ground before replacement.
If the user does not mention the removal of the control system when using the electric welding, the system chip will be damaged and the "F4-2 fuse failure" will appear.
The meter shows "Voltage is too high"
In the event of a malfunction, stop immediately to extinguish the road sweeper engine and check if the battery voltage is normal (the voltage is about 24V).
Check if the working condition of the road sweeper engine is normal.
1, the failure of the control system to work properly
The meter displays "Master communication failure"
Detect the road cleaning vehicle main control board LS2 socket (24 feet, white) 3rd foot 15#, 4th foot 30# power line (red and white) whether there is voltage input (24~30W);
Detect the road cleaning vehicle main control board LS2 socket (24 feet, white), the 19th foot ground (brown) is well grounded;
Detecting the road sweeper main control board LS2 socket (24 feet, white) 24th communication line (light blue) and meter C1 socket (8 feet, black) 4th communication line (light blue) Good mutual connection, whether there is short circuit or grounding;
The meter displays "Drive communication failure"
Detection drive board JPC socket (6 feet, white) 3rd foot communication line (light blue red) and meter C1 socket (8 feet in total, black) 4th foot communication line (light blue red) is in good contact, yes There is a break or grounding phenomenon;
The meter displays "Drive board module overheating"
If the temperature inside the drive board is too high, stop driving first, and wait for the temperature inside the drive board to drop to normal.
Check whether the lamp is connected more than the set power of the sweeper. The standard power of the main vehicle is 21W×2+5W on one side and 21W on one side of the trailer.
2, the garbage sweeper relay drive output failure
The meter shows "intermittent wiper failure"
Detect whether the garbage sweeper relay J7 (double garbage sweeper relay, a total of 5 feet) has been damaged;
Whether fuse F5-2 has been blown;
Driver board JPG socket (a total of 10 feet, black) 4th foot intermittent wiper output line (brown light blue) to the wiper motor between the wire harness is grounded.
The meter displays "Air conditioning power failure"
Detecting whether the garbage sweeper relay J3 has been damaged;
Whether fuse F5-3 has been blown;
Driver board JPG socket (a total of 10 feet, black) 1st foot air conditioning power output line (black and red) to the wire harness between the sweeping car fan is iron.
The meter shows "high beam failure"
Check if the garbage sweeper relays J4, J14 have been damaged;
Whether the fuses F5-5 and F6-4 have been blown;
Driver board JPG socket (10 feet in total, black) 5th foot and JPI socket (6 feet in total, white) The 2nd and 3rd foot high beam output lines to the wiring harness between the bulbs are grounded.
The meter displays "position light failure"
Detect whether the garbage sweeper relays J9 and J10 have been damaged;
Whether fuses F6-1, F6-2 have been blown;
Driver board JPG socket (10 feet in total, black) 7th foot and JPI socket (6 feet in total, white) 1st position and other output lines to the wiring harness between the bulbs.
The meter displays "Front fog light failure"
Detecting whether the garbage sweeper relay J5 has been damaged;
Whether fuse F6-3 has been blown;
Driver board JPG socket (10 feet in total, black) 9th foot front fog light output line (gray black) to the wire harness between the bulbs.
The meter shows "low beam failure"
Check if the garbage sweeper relays J8 and J13 have been damaged;
Whether fuses F5-4, F6-5 have been blown;
Driver board JPG socket (10 feet in total, black) 3rd foot and JPI socket (6 feet in total, white) The 6th low beam output line to the wiring harness between the bulbs is grounded.
3, small and medium power output failure
The meter displays "Brake light failure"
Brake light bulb is damaged.
The brake light output line is broken or grounded.
Driver board JPH socket (8 feet in total, white) 6th foot brake light output line (black and red) connected to 30# power supply, check that there are several light bulbs on, and more to remove. If there is no light bulb, check the output line to the light bulb for disconnection or grounding.
The meter shows "reverse light failure"
The backup lamp bulb is damaged.
The reverse light output line is shorted or grounded.
Give the drive board JPH socket (8 feet in total, white). The 8th foot reversing light output line (black and white) is connected to the 30# power supply. Check that there are several light bulbs on the light, and remove more and less. If there is no light bulb, check the output line to the light bulb for disconnection or grounding.
The meter displays "Front fog light failure"
The rear fog light bulb is damaged.
The rear fog light output line is broken or grounded.
Give the driver board socket 7 foot rear fog light output line (yellow green white) to connect 30# power supply, check that there are several light bulbs on, and remove more and less. If there is no light bulb, check the output line to the light bulb for disconnection or grounding.
The meter shows "Neutral valve failure"
The neutral valve is damaged;
In the event of a fault, check the driver board JPF socket (12 feet, white). The 8th foot valve output line (black, green and purple) to the solenoid valve is grounded.
The meter shows "wheel valve fault"
Open the wheel difference switch, the meter will immediately display the "wheel valve fault", then check the driver board JPF socket (12 feet, white), the 10th wheel differential valve output line (black green red) to the wheel valve There is a grounding phenomenon.
Turn on the switch, and after about eight seconds, the “wheel valve fault” will be displayed after the meter and the wheel in-position indicator will flash. At this point, use a ground wire to connect to the wheel differential switch plug.
If the faulty meter indicates that the fault is removed and the wheel in-position indicator is steady on, it indicates that the wheel-to-position switch is damaged.
If the fault is not eliminated, check the drive board JPE socket (28 feet, black) 12P 3rd wheel differential in-position signal line (brown light blue red) to the connection between the wheel-to-wheel switch is good.
The meter shows "Axis valve fault"
Open the shaft difference switch, the meter will immediately display the "axis difference valve fault", then check the drive board JPF socket (12 feet, white) 9th foot shaft valve output line (black green white) to the shaft difference valve Is there a grounding phenomenon?
Turn on the shaft misalignment switch, the instrument will display “Axis Difference Valve Fault” after eight seconds and the shaft difference in-position indicator will flash. Connect the ground wire to the shaft difference in place switch plug;
If the faulty meter indicates that the fault is eliminated and the wheel difference in-position indicator is always on, it indicates that the shaft difference in-position switch is damaged;
If the faulty meter shows that the fault is eliminated and the all-drive in-position indicator is always on, it indicates that the all-drive in-position switch is damaged;
If the fault is not eliminated, check the JPE socket of the driver board (28 feet in total, black). The 12P pin 10 is fully connected to the signal line (brown light blue gray) to the connection between the all-drive in-position switches.
The meter shows "power take-off valve failure"
Open the power take-off switch, the meter will immediately display "power take-off fault", then check the drive board JPF socket (12 feet, white) 11th foot power take-off valve output line (black green yellow) to the power take-off Is there a grounding phenomenon between the valves?
Turn on the power take-off switch, the meter will display “power take-off valve fault” after eight seconds and the power take-off indicator will flash. Connect the ground wire to the power take-off in place switch plug;
If the faulty meter indicates that the fault is eliminated and the power take-off indicator is steady on, it indicates that the power take-off switch is damaged;
If the fault is not eliminated, check the driver board JPE socket (28 feet in total, black). 12P 9th foot power take-off signal line (brown light blue) to the power take-off switch is good.
4, sensor failure
The meter displays "Oil level sensor failure"
Connect the signal line of the oil level sensor plug directly to the iron to see if the instrument malfunction is removed.
If the fault is not removed, check whether there is a disconnection between the signal line (brown black) of the C2 socket of the meter and the sensor plug;
If the displayed fault is removed, re-process the ground wire at the sensor plug end to ensure a good connection, otherwise replace the sensor.
Cut the C2 plug 1 pin signal line, connect a resistor of about 100 ohms in series, and connect the other end of the resistor directly to the ground. If the meter is connected well, the meter will indicate the center scale, indicating that the meter is good. In this case, check the sensor and signal. Line connection.
The meter displays "Brake pressure 1 fault"
Connect the brake air pressure 1 sensor plug end signal line directly to see if the instrument fault is removed.
If the fault has not been removed, check whether there is a disconnection between the 2 pin signal line (brown light blue) of the meter C2 socket and the sensor plug;
If the fault displayed by the meter is removed, re-process the ground wire at the sensor plug end to ensure a good connection, otherwise replace the sensor.
Cut the 2 pin signal line of C2 plug, connect a resistor of about 100 ohms in series, and connect the other end of the resistor directly to the ground. If the meter is connected well, the meter will indicate the center scale, indicating that the meter is good. In this case, check the sensor and signal. Line connection.
The meter displays "Brake air pressure 2 fault"
Connect the brake air pressure 2 sensor plug end signal line directly to see if the instrument fault is removed.
If the fault has not been removed, check the C2 socket 3 pin signal line (brown purple) to the sensor plug for disconnection;
If the fault displayed by the sweeper‘s instrument is removed, re-process the ground wire at the sensor plug end to ensure a good connection, otherwise replace the sensor.
Cut the C2 plug 3 pin signal line, connect a resistor of about 100 ohms in series, and connect the other end of the resistor directly to the ground. If the meter is connected well, the meter will indicate the center scale, indicating that the meter is good. In this case, check the sensor and signal. Line connection.
The meter shows "oil pressure failure"
Connect the signal line of the oil pressure sensor plug end directly to see if the instrument fault is removed.
If the fault has not been removed, check whether there is a disconnection between the 4-pin signal line (brown) of the C2 socket of the meter and the sensor plug;
If the fault displayed by the sweeper‘s meter is removed, re-treat the ground wire at the sensor plug end to ensure a good connection, otherwise replace the sensor.
Cut the 4 pin signal line of C2 plug, connect a resistor of about 100 ohms in series, and connect the other end of the resistor directly to the ground. If the meter is connected well, the meter will indicate the center scale, indicating that the meter is good. In this case, check the sensor and signal. Line connection.
Euro 3 emission vehicles, namely HOWO8 and HOWO9 vehicles, the engine pressure signal is sent by the road sweeper engine ECU to the instrument or meter through the CAN line to directly collect the sensor signal; the oil pressure data sent by the CAN line is preferentially combined with the sensor to collect the signal, ie: if CAN Simultaneously send data to the meter with the sensor, the meter only accepts CAN signal data.
The meter displays "speed signal failure"
If the instrument does not detect the road sweeper engine speed signal when the road sweeper engine is working, the meter will display “speed signal fault”. In the event of a fault, cut off the 9-pin (light blue purple) speed signal line of the C2 plug of the instrument and quickly jog the ground. If the tachometer has a swing phenomenon, the meter is good. In this case, check the C2 socket of the instrument. Whether the line (light blue purple black) is disconnected or grounded between the "W" points of the engine speed signal output end of the road sweeper, if it is normal, it is detected whether the signal output of the generator is good.
Euro 3 emission vehicles, namely HOWO8 and HOWO9 vehicles, the engine pressure signal is sent by the road sweeper engine ECU to the instrument or meter through the CAN line to directly collect the sensor signal; the oil pressure data sent by the CAN line is preferentially combined with the sensor to collect the signal, ie: if CAN Simultaneously send data to the meter with the sensor, the meter only accepts CAN signal data.
5, other instruments display alarm (special models)
The meter shows "Oil filter blocked"
The oil filter blocks the signal line to ground and the meter displays "Oil filter blockage".
Unplug the oil filter to block the sensor plug and measure the short between the two pins of the sensor.
Replace the filter if shorted;
If the road sweeper main control board LS3 socket is not checked, the 7th foot filter signal line to the sensor where the wiring harness is short-circuited to the ground.
The meter shows "Diesel filter blocked"
The diesel filter blocks the signal line to ground and the meter displays "Diesel filter blockage".
Unplug the diesel filter to block the sensor plug and measure the short between the two pins of the sensor.
Replace the filter if shorted;
If the road sweeper main control board LS3 socket is not checked, the signal line between the 8th foot filter and the sensor is short-circuited to the ground.
The meter shows "Please stop the road sweeper engine"
In the case of the road sweeper engine work, the electric key (15# power supply) cannot be turned off, otherwise the meter displays “Please listen to the road sweeper engine”
In the event of a fault, check if the power line (black and red) of pin 7 of the C1 socket of the instrument C1 has a voltage of about 24V;
If not, check if the driver‘s board JPC socket 6 pin 15# power cord (black and red) has 24V power supply;
If not, check the 15# power cord (black) and ignition key switch of the D1 power cord plug.
The meter displays "F4-2 fuse failure"
Replace the F4-2 fuse and check whether the reverse lamp, brake light, rear fog lamp, work lamp, and valve output are short-circuited to ground before replacement.
If the user does not mention the removal of the control system when using the electric welding, the system chip will be damaged and the "F4-2 fuse failure" will appear.
The meter shows "Voltage is too high"
In the event of a malfunction, stop immediately to extinguish the road sweeper engine and check if the battery voltage is normal (the voltage is about 24V).
Check if the working condition of the road sweeper engine is normal.
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