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.
Terminals and Reference Value for BCM
- Check combination switch system terminal waveform under the loaded condition with lighting switch, turn signal and wiper switch OFF not to be fluctuated by overloaded.
- Turn wiper dial position to 4 except when checking waveform or voltage of wiper dial position. Wiper dial position can be confirmed on CONSULT-II. Refer to "DATA MONITOR ".
| Terminal No. | Wire color | Item | Measuring condition | Reference value | ||
|---|---|---|---|---|---|---|
| Ignition switch | Operation or condition | |||||
| 2 | G/Y | Combination switch input 5 | ON | Lighting, turn, wiper switch (Wiper intermittent dial position 4) | OFF | Approx. 0 V |
Any of the conditions below
|
Approx. 1.0 V |
|||||
| Lighting switch 2ND |
Approx. 2.0 V |
|||||
| 3 | L/B | Combination switch input 4 | ON | Lighting, turn, wiper switch (Wiper intermittent dial position 4) | OFF | Approx. 0 V |
| Front fog lamp switch (Operates only front fog lamp switch) |
Approx. 0.8 V |
|||||
Any of the conditions below
|
Approx. 1.0 V |
|||||
| 4 | PU/W | Combination switch input 3 | ON | Lighting, turn, wiper switch (Wiper intermittent dial position 4) | OFF | Approx. 0 V |
Any of the conditions below
|
Approx. 1.0 V |
|||||
| 5 | Y/R | Combination switch input 2 | ON | Lighting, turn, wiper switch | OFF | Approx. 0 V |
Any of the conditions below
|
Approx. 1.0 V |
|||||
| Rear wiper switch ON (Wiper intermittent dial position 4) |
Approx. 0.8 V |
|||||
| 6 | S/B | Combination switch input 1 | ON | Lighting, turn, wiper switch | OFF | Approx. 0 V |
Any of the conditions below
|
Approx. 1.0 V |
|||||
Any of the conditions below
|
Approx. 1.7 V |
|||||
Any of the conditions below
|
Approx. 0.8 V |
|||||
| 32 | GY/R | Combination switch output 5 | ON | Lighting, turn, wiper switch | OFF (Wiper intermittent dial position 4) |
Approx. 7.2 V |
Any of the conditions below
|
Approx. 1.0 V |
|||||
| 33 | G | Combination switch output 4 | ON | Lighting, turn, wiper switch | OFF (Wiper intermittent dial position 4) |
Approx. 7.2 V |
Any of the conditions below
|
Approx. 1.2 V |
|||||
| 34 | W/B | Combination switch output 3 | ON | Lighting, turn, wiper switch | OFF |
Approx. 7.2 V |
Any of the conditions below
|
Approx. 1.2 V |
|||||
| 35 | W/G | Combination switch output 2 | ON | Lighting, turn, wiper switch (Wiper intermittent dial position 4) | OFF |
Approx. 7.2 V |
Any of the conditions below
|
Approx. 1.2 V |
|||||
| 36 | W/R | Combination switch output 1 | ON | Lighting, turn, wiper switch (Wiper intermittent dial position 4) | OFF |
Approx. 7.2 V |
Any of the conditions below
|
Approx. 1.2 V |
|||||
| 37 | B/W | Key switch signal | OFF | Key is removed | Approx. 0 V | |
| Key is inserted | Battery voltage | |||||
| 38 | W/L | Ignition power supply | ON | - | Battery voltage | |
| 39 | L | CAN-H | OFF | - | - | |
| 40 | P | CAN-L | OFF | - | - | |
| 42 | L/R | Battery power supply | OFF | - | Battery voltage | |
| 49 | B | Ground | ON | - | Approx. 0 V | |
| 52 | ||||||
| 55 | G | Battery power supply | OFF | - | Battery voltage | |
| 62 | W | Front door switch (Driver side) | OFF | When driver side door is opened (Door switch ON) | Approx. 0 V | |
| When driver side door is closed (Door switch OFF) | Approx. 12 V | |||||
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.