DongFeng S30 - Page 226

Sunroof
15-6
2. Common troubleshooting
Symptom of
failure
Failure analysis Troubleshooting
Mechanical failure
Turn on ignition switch and press Slide or Tilt button. If
sunroof moves a little or if the sound of relay actuation is
heard but sunroof doesn’t move:
 Replace sunroof frame assembly.
No drive power
supply
Power supply line fault. Please check:
 Fuse of sunroof driving circuit;
 Power supply line and harness of sunroof.
No control signal
1. Check whether the voltage of the 4
th
pin of sunroof
control unit is battery voltage. If not,
 Check the signal circuit and harness of ignition
switch.
2. Turn on ignition switch and press and hold Tilt
button. Check whether the voltage of the 5
th
pin of
sunroof control unit is battery voltage. If not:
 Check Tilt status signal circuit;
 Check Tilt operation button.
3. Igniter is in effective position. Press and hold Slide
button. Check whether the voltage of the 6
th
pin of
ECU is at high level (battery voltage). If not:
 Check Slide status signal circuit;
 Check Slide operation button.
Sunroof is inactive
ECU fault
1. Igniter is in effective position. Press and hold Tilt and
Slide buttons respectively. Check that the voltage of
the 5
th
and 6
th
pins of ECU is battery voltage:
 Replace ECU.
Sunroof stops in
incorrect position
Information loss of
system internal
position
1. Check whether the voltage of the 1
st
and 2
nd
pins of
ECU is in the range of effective working
voltage. If not:
 Charge battery or replace the battery with an
acceptable battery;
 Check sunroof power supply line and harness;
 Perform initialization operation after voltage is
recovered into the range of effective working
voltage.
2. Perform initialization operation after battery
replacement or after voltage is recovered into the
range of effective working voltage. “Initialization
operation”:
 Operate Slide or Tilt buttons to make sunroof in a
certain middle position, press and hold Tilt button till
sunroof is in full tilt position and makes a short
sound, then immediately release Tilt button;
3. If sunroof operation is still abnormal after
initialization:
 Check whether Hall sensor is broken;
 Check whether the voltage of the 1
st
and 2
nd
pins of
ECU is in the range of effective working
voltage.
In system-defined
stop position
1. Check whether sunroof is in full tilt position where
sunroof doesn’t respond to operation.
No response to Tilt
button or partially
nonresponsive
Tilt signal fail
1. Press and hold Tilt button. Check whether the
voltage of the 5
th
pin of ECU is at high level (battery
voltage). If not:
 Check the signal circuit of Tilt operation;