Contents: Checking the rear hatch glass ↧ The front window heating does not… ↧ Neither the heated front window nor… ↧ Rear window heating not working ↧
Checking the rear hatch glass
If during operation it is noticed that one of the grid lines is not working, the break can be detected by performing the following steps. If none of the grid lines are working, a full diagnostic of the system should be carried out before starting repairs.
1. Turn the ignition to the ON position.
2. Turn on the heated rear hatch glass.
3. From inside the car, connect a voltmeter to each end of the grid line. The voltmeter will indicate the voltage supplied by the battery if the grid line is open.
Note: Be careful when touching the voltmeter contacts to the grid line. If you apply the contacts roughly, you may scratch the grid, which will cause the circuit to break.
4. If the grid line is open, the voltmeter contacts should be moved from one side of the line and the test repeated closer to the other side of the window. Continue the test, each time moving the voltmeter contacts closer to the side of the window opposite to where the measurements were started. The point where the grid line breaks is the place where the voltmeter starts to show 0 instead of the voltage supplied by the battery.
5. Using marking chalk, clearly mark the break point on the rear window. The glass, not the grid line itself, should be marked, and the mark should be made far enough away that it can be removed without destroying the correction.
6. Repair a break in a grid line with a grid line repair kit. See "Repair of heating grid lines of rear hatch glass" in this section.
The front window heating does not work, the outside rearview mirror heating works normally.
| Step | Operation | Values | Yes | No |
| 1 |
Check fuse Ef25.
Is the fuse blown?
|
-
|
Go to Step 2
|
Go to Step 3
|
| 2 |
Is the renovation finished?
|
-
|
The system is normal
|
-
|
| 3 |
Using a voltmeter, check the voltage at EF25.
Does the voltmeter show the specified value?
|
11~14V
|
Go to Step 5
|
Go to Step 4
|
| 4 |
Eliminate the break in the power supply circuit to fuse Ef25.
Is the renovation finished?
|
-
|
The system is normal
|
-
|
| 5 |
Check the glass heating relay.
Is the relay working properly?
|
-
|
Go to Step 7
|
Go to Step 6
|
| 6 |
Replace the glass heating relay.
Is the renovation finished?
|
-
|
The system is normal
|
Go to Step 8
|
| 7 |
Check the circuit between the glass heating relay and fuse EF25 for an open circuit and repair it if necessary.
Is the renovation finished?
|
-
|
The system is normal
|
-
|
| 8 |
Check for an open circuit in the circuit between the glass heating relay and ground; correct the fault if necessary.
Is the renovation finished?
|
-
|
The system is normal
|
-
|
Neither the heated front window nor the heated outside rear view mirrors work
| Step | Operation | Values | Yes | No |
| 1 |
Check fuse Ef25.
Is the fuse blown?
|
-
|
Go to Step 2
|
Go to Step 3
|
| 2 |
Is the renovation finished?
|
-
|
The system is normal
|
-
|
| 3 |
Does the voltmeter show the specified value?
|
11~14V
|
Go to Step 4
|
Go to Step 5
|
| 4 |
Check the instrument panel fuse box for poor contact and repair if necessary.
Is the renovation finished?
|
-
|
The system is normal
|
-
|
| 5 |
Check the circuit between fuse EF25 and BCM for open, repair if necessary.
Is the renovation finished?
|
-
|
The system is normal
|
-
|
Rear window heating not working
| Step | Operation | Values | Yes | No |
| 1 |
Check fuse Ef30.
Is the fuse blown?
|
-
|
Go to Step 2
|
Go to Step 3
|
| 2 |
Is the renovation finished?
|
-
|
The system is normal
|
-
|
| 3 |
Check for an open circuit in the circuit between the rear window heater and ground; correct the fault if necessary.
Is the renovation finished?
|
-
|
The system is normal
|
-
|