Hyundai Ioniq: Brake System / Stop Lamp Switch. Repair procedures
1. | Turn ignition switch OFF and disconnect the negative (-) battery cable. |
2. | Remove the lower crash pad. (Refer to Body - "Crash Pad") |
3. | Remove the knee airbag. (Refer to Rstraint - "Air Bag Module") |
4. | Disconnect the stop lamp switch connector (A). ![](images/stop_lamp_switch_repair_procedures-1008/413/saebr6h031d_n.gif)
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5. | Pull the locking plate (A) as indicated by the arrow. ![](images/stop_lamp_switch_repair_procedures-1008/413/saebr6h032d_n.gif)
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6. | Turn stop lamp switch 45° counterclockwise and remove it. ![](images/stop_lamp_switch_repair_procedures-1008/413/saebr6h033d_n.gif)
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7. | Inspect a removed stop lamp switch along the below procedures. (1) | Confirm a normal connection with terminal part –
| A confirmation can be made to see if the connector has been secured properly and if a connection mark is present. |
![](images/stop_lamp_switch_repair_procedures-1008/413/sdhbr4060d_n.gif)
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1. | Fix the brake pedal arm and insert fully the stop lamp switch as hiding contact part. Turn stop lamp switch 45° clockwise and install it. ![](images/stop_lamp_switch_repair_procedures-1008/413/saebr6h035d_n.gif)
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2. | Assemble locking plate (A) by pushing. ![](images/stop_lamp_switch_repair_procedures-1008/413/saebr7h002l_n.gif)
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3. | Confirm the gap between stop lamp switch and bracket. Stop lamp clearance : 1.0 - 2.0 mm (0.04 - 0.08 in.) |
![](images/stop_lamp_switch_repair_procedures-1008/413/stlbr6083d_n.gif)
•
| If the gap between stop lamp switch and bracket is not 1.0 - 2.0 mm (0.04 - 0.08 in), perform the above process again. |
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4. | Connect the stop lamp switch connector. ![](images/stop_lamp_switch_repair_procedures-1008/413/saebr6h031d_n.gif)
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5. | Remove the knee airbag. (Refer to Rstraint - "Air Bag Module") |
6. | Install the lower crash pad. (Refer to Body - "Crash Pad") |
7. | Connect the negative (-) battery cable. |
1. | Turn ignition switch OFF and disconnect the negative (-) battery cable. |
2. | Remove the lower crash pad. (Refer to Body - "Crash Pad") |
3. | Remove the knee airbag. (Refer to Rstraint - "Air Bag Module") |
4. | Confirm the gap between stop lamp switch and bracket. Stop lamp clearance : 1.0 - 2.0 mm (0.04 - 0.08 in.) |
![](images/stop_lamp_switch_repair_procedures-1008/413/syfbr0059d_n.gif)
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5. | If the gap between stop lamp switch and bracket is not 1.0 - 2.0 mm (0.04 - 0.08 in), check the mounting clip and other part of around stop lamp. |
6. | If there is normal, remove the stop lamp switch and then install again. |
1. Fuse Inspection
Mount the test fuse to the switch fuse and relay fuse part to confirm a normal joint fit.
![](images/stop_lamp_switch_repair_procedures-1008/413/sdhbr4120n_n.gif)
![](images/stop_lamp_switch_repair_procedures-1008/413/sdhbr4121n_n.gif)
2. GDS Data Analysis
1. | Analyze GDS data and confirm if there is anything wrong with the stop lamp switch. (1) | Connect the GDS to the self-diagnosis connector. |
(2) | Turn the spark switch on |
(3) | Step on the brake pedal. |
(4) | Inspect the "brake switch" category that displays the "sensor data" GDS. Normal waveform : The pressure sensor signal value will change according to the brake ON/OFF switch. |
![](images/stop_lamp_switch_repair_procedures-1008/413/sdhbr4026n_n.gif)
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3. Inspection Of Connector By Each Part
Check to see whether or not each connector has been damaged, or terminal surge, or incomplete connection has taken place
[Engine Room Junction Box]
![](images/stop_lamp_switch_repair_procedures-1008/413/sdhbr4122n_n.gif)
[ABS / VDC Control Module]
![](images/stop_lamp_switch_repair_procedures-1008/413/sdhbr4057d_n.gif)
4. Inspect The Stop Lamp Circuit
Connect probe to each terminal wire and confirm oscilloscope waveform.
[Stop Lamp Switch Input / Output]
![](images/stop_lamp_switch_repair_procedures-1008/413/sdhbr4062d_n.gif)
[Oscilloscope Waveform Screen]
![](images/stop_lamp_switch_repair_procedures-1008/413/stlbr6003n.gif)
Troubleshooting1. Part diagnosis Items Cause Symptom Switch fuse Faulty fuse connection, Damaged fuse –
DTC Code : P0504–
Symptom : Shifting gear trouble, Starting failure, Cruise control function cancelation trouble, EPB function cancelation trouble, Stop lamp lighting trouble, ESP OFF light illuminated...
Other information:
TroubleshootingWater Pump
Symptoms
Possible Causes
Remedy
Coolant leakage•
From the bleed hole of the water pumpVisually check•
Check leaks after about ten-minute warming up...
To install a LATCH-compatible child restraint in either of the rear outboard
seating positions:
1. Move the seat belt buckle away from the lower anchors.
2. Move any other objects away from the anchors that could prevent a secure connection
between the child restraint and the lower anchors...
Categories
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1. Engine oil filler cap
2. Engine oil dipstick
3. Engine coolant cap
4. Engine coolant reservoir
5. Inverter coolant reservoir
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