Engine JAC HFC4DA1-2C. Manual — part 87
JAC Multifunctional Commercial Vehicle Company Sunray series
Power Window
- 137 -
Instruction
Instruction
Instruction
Instruction and
and
and
and operation
operation
operation
operation
Instructions
Instructions
Instructions
Instructions for
for
for
for power
power
power
power window
window
window
window function
function
function
function
1.
Power window switch.
Power window is controlled by 2 window switches
on front door trims. The window switch at the
driver’s side enables the driver to control windows
at the passenger’s side.
2.
Power window motor.
Permanent-magnetic
reversible
motor
enables
window regulator upper window bracket to move
by the rope wheel mechanism. Connect the battery
positive and negative to both terminals of motor
and enable the motor to rotate towards one
direction. The reverse current flowing to the 2
same connections enables the motor to rotate in
reverse.
3.
Operation mode.
Operation mode of power window includes:
Manual up;
Manual down;
Auto down (only driver side door)
4.
After the ignition switch off, the power window
can still be operated, and cannot be operated when
the following situation occurs:
�
Time for ignition switch off is more than 30
seconds.
�
Any door is opened.
�
Lock the doors from outside.
GW
GW
GW
GW Power
Power
Power
Power Window
Window
Window
Window
-- 138 --
Diagnosis
Diagnosis
Diagnosis
Diagnosis and
and
and
and Testing
Testing
Testing
Testing
Troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
1.
All the door power windows cannot operate.
Step
Operation Method
Yes
No
1
Check if F31 50A fuse of engine compartment fuse block, F29 15A fuse, F7
10A fuse, F12 10A fuse of meter fuse block are disconnected.
Go to Step 8
Go to Step 2
2
Check if the power supply for ETACS is normal
①Turn the ignition switch off and the voltage between Terminal 10 of
ETACS connector M36 and ground is the battery voltage.
②Turn the ignition switch on and the voltage between Terminal 18, Terminal
9 of ETACS connector M37 and ground is the battery voltage.
Go to Step 3
Go to Step 9
3
Check if the ground for ETACS is normal
Turn the ignition switch off and disconnect the ETACS connector. Terminal
19 of connector M36 and ground are conductive.
Go to Step 4
Go to Step 10
4
Check if the operation of power window relay is normal.
①Terminal 2 and 4 of relay are constant power supply.
②After the ignition switch is turned on, the voltage for Terminal 1 of relay is
the battery voltage.
Go to Step 7
Go to Step 5
5
Turn the ignition switch on and check if Terminal 3 of power window relay
grounds.
Go to Step 11
Go to Step 6
6
Check if the harnesses of ETACS and power window relay are conductive.
Terminal 15 of ETACS connector M36 should be conductive with Terminal 3
of relay.
Go to Step 13
Go to Step 14
7
Check if the power supply and ground wire for left front door power window
switch are normal
①Turn the ignition switch on and the battery voltage exists between Terminal
11 of left front door power window switch connector D04 and ground.
②Terminal 10 of left front door power window switch connector D04 and
ground are conductive.
Go to Step 12
Go to Step 15
8
After servicing the fault due to circuit, replace the fuse. Is the fault
eliminated?
Go to Step 2
9
Repair the open or short power supply circuit for ETACS. Is the fault
eliminated?
Go to Step 3
10
Check if the ground circuit for ETACS is open.
Go to Step 4
11
Repair the circuit fault and replace the power window relay. Is the fault
eliminated?
Go to Step 7
12
Replace the left front door power window switch.
13
Replace the ETACS.
Go to Step 7
14
Repair the connecting circuit between ETACS and power window. Is the fault
eliminated?
Go to Step 13
15
Repair the harnesses of left front door power window switch. Is the fault
eliminated?
Go to Step 12
JAC Multifunctional Commercial Vehicle Company Sunray series
Power Window
- 139 -
Diagnosis
Diagnosis
Diagnosis
Diagnosis and
and
and
and Testing
Testing
Testing
Testing
Troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
2.
The left front door power window cannot operate.
Step
Operation Method
Yes
No
1
Check if the output signal from power window main switch is normal
Disconnect the left front door power window motor connector and turn the ignition switch
on. When the power window main switch goes up, the voltage between Terminal 2 of left
front door power window motor connector D08 and ground is the battery voltage, the voltage
between Terminal 1 and ground is 0 V, and it is reverse when going down.
Go to Step 2
Go to Step 3
2
Replace the left front door power window motor.
3
Check if the harness connection between left front door power window switch and motor is
normal.
Go to Step 2
Go to Step 4
4
Repair the harness connector between left front door power window switch and motor. Is the
fault eliminated?
Go to Step 2
GW
GW
GW
GW Power
Power
Power
Power Window
Window
Window
Window
-- 140 --
Diagnosis
Diagnosis
Diagnosis
Diagnosis and
and
and
and Testing
Testing
Testing
Testing
Troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
3.
The right front door power window cannot operate.
Step
Operation Method
Yes
No
1
Check if the output signal from power window main switch is normal
Disconnect the right front door power window motor connector and turn the
ignition switch on. When the right front door power window main switch
goes up, the voltage between Terminal 1 of right front door power window
motor connector D15 and ground is the battery voltage, the voltage of
Terminal 2 is 0 V, and it is reverse when going down.
Go to Step 2
Go to Step 3
2
Replace the right front door power window motor.
3
Check if the conductivity of right front door power window switch is normal
Disconnect the right front door power window switch connector D12 and
check the conductivity between Terminal 4, 6, 8 and Terminal 1, 3. Terminal
1 and 6, Terminal 2 and 8 are conductive when going up. Terminal 3 and 6,
Terminal 1 and 4 are conductive when going down. Terminal 3 and 8,
Terminal 1 and 4 are conductive when no operation.
Go to Step 5
Go to Step 4
4
Replace the right front door power window switch.
5
Check if the harnesses of right front door power window switch and right
front door power window motor are conductive. Terminal 3 and 1 of right
front door power window switch connector D12 are respectively conductive
with Terminal 2 and 1 of right front door power window motor connector
D15.
Go to Step 7
Go to Step 6
6
Repair or replace the harnesses of right front door power window switch and
right front door power window motor. Is the fault eliminated?
Go to Step 7
7
Check if the power supply for replacing right front door power window
switch is normal
Turn the ignition switch on and the voltage between Terminal 6 of right front
door power window switch connector D12 and ground is the battery voltage.
Go to Step 4
Go to Step 8
8
Check if Terminal 1 of the left front door power window switch connector
D04 and Terminal 6 of right front door power window connector D12 are
conductive.
Go to Step 10
Go to Step 9
9
Repair or replace the connecting wire of left front door power window switch
connector and right front door power window switch connector. Is the fault
eliminated?
Go to Step 10
10
Replace the left front door power window switch.
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