Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Rear Window & Outside Mirror Defogger Function
2003 Hyundai Tiburon L4-2.0LSECTION Rear Window & Outside Mirror Defogger Function
REAR WINDOW & OUTSIDE MIRROR DEFOGGER
1. Function explanation: When rear window defogger switch on while engine is running, it works.
2. Related schematic diagrams
- See the Charging System and Rear Window & Outside Mirror Defogger.
3. Input/output signal
- Fuse: F12 (30 A)
- Input: Rear defogger switch (H19), Generator L (C13)
- Output: Rear defogger output [Rear window (G1), Rear window defogger indicator lamp (I10), Outside mirror defogger (F19)]
4. Related Hi-scan(pro) failure diagnosis
1. Input/output monitoring
1. Select "01.POWER" and press [ENTER].
Then, the following screen will be displayed.
Check BCM input condition against generator voltage.
2. Select "07.ETC" and press [ENTER].
Then the following screen will be displayed.
Check BCM input/output condition against rear window defogger switch and rear window defogger.
2. Actuator inspection
1. Select "01.INPUT ACTUATION" and press [ENTER].
Perform forced drive against rear window defogger switch.
2. Select "02.0UTPUT ACTUATION" and press [ENTER].
Perform forced drive against rear window defogger.
5. Expected failure symptoms
1. Rear window defogger indicator lamp does not work.
2. Rear window defogger does not work.
3. Left side outside mirror defogger does not work.
4. Right outside mirror defogger does not work.
6. Actions by the failure symptoms
1. Rear window defogger does not work.
2. Rear window defogger does not work.
3. Left outside mirror defogger does not work.
4. Right outside mirror defogger does not work.
1. Function explanation: When rear window defogger switch on while engine is running, it works.
2. Related schematic diagrams
- See the Charging System and Rear Window & Outside Mirror Defogger.
3. Input/output signal
- Fuse: F12 (30 A)
- Input: Rear defogger switch (H19), Generator L (C13)
- Output: Rear defogger output [Rear window (G1), Rear window defogger indicator lamp (I10), Outside mirror defogger (F19)]
4. Related Hi-scan(pro) failure diagnosis
1. Input/output monitoring
1. Select "01.POWER" and press [ENTER].
Then, the following screen will be displayed.
Check BCM input condition against generator voltage.
2. Select "07.ETC" and press [ENTER].
Then the following screen will be displayed.
Check BCM input/output condition against rear window defogger switch and rear window defogger.
2. Actuator inspection
1. Select "01.INPUT ACTUATION" and press [ENTER].
Perform forced drive against rear window defogger switch.
2. Select "02.0UTPUT ACTUATION" and press [ENTER].
Perform forced drive against rear window defogger.
5. Expected failure symptoms
1. Rear window defogger indicator lamp does not work.
2. Rear window defogger does not work.
3. Left side outside mirror defogger does not work.
4. Right outside mirror defogger does not work.
6. Actions by the failure symptoms
1. Rear window defogger does not work.
2. Rear window defogger does not work.
3. Left outside mirror defogger does not work.
4. Right outside mirror defogger does not work.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.