Major Components and Functions
| Components | Functions |
|---|---|
| BCM | Turns on/off circuits of tail light and headlamp according to signals from optical sensor, lighting switch (AUTO), driver door switch, passenger door switch, rear door switch, and ignition switch (ON, OFF). |
| Optical sensor | Converts outside brightness (lux) to voltage, and sends it to BCM. (Detects brightness of 50 to 1,300 lux) |
MAJOR COMPONENTS AND FUNCTIONS CHART
Scheme 309
| CAUTION | Check combination switch system terminal waveform under the loaded condition with lighting switch, turn signal switch 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 ". |
TERMINALS AND REFERENCE VALUES CHART Terminal No. Wire color Signal name Measuring condition Reference value Ignition switch Operation or condition 4 R/G Combination switch input 3 ON Lighting, turn, wiper OFF (Wiper dial position 4) Lighting switch AUTO OFF Approx. 0V 11 V Ignition switch (ACC) ACC - Battery voltage 12 P Front door switch passenger side signal OFF Front door switch passenger side ON (open) Approx. 0V OFF (closed) 13 O/L Rear door switch RH signal OFF Rear door switch RH ON (open) Approx. 0V OFF (closed) 14 W/B Optical sensor signal ON When optical sensor is illuminated. 3.1V or more (1) When optical sensor is not illuminated. 0.6V or less 17 Y Optical sensor power supply ON - Approx. 5V 18 B Optical sensor ground ON - Approx. 0V 33 GR Combination switch output 4 ON Lighting, turn, wiper OFF (Wiper dial position 4) Lighting switch AUTO OFF 38 W Ignition switch (ON) ON - Battery voltage 39 L CAN - H - - - 40 P CAN - L - - - 42 P Battery power supply OFF - Battery voltage 52 B Ground ON - Approx. 0V 55 W Battery power supply OFF - Battery voltage 62 V Front door switch driver side signal OFF Front door switch driver side ON (open) Approx. 0V OFF (closed) 63 R/G Rear door switch LH signal OFF Rear door switch LH ON (open) Approx. 0V OFF (closed) NOTE: (1) Optical sensor must be securely subjected to work lamp light. If the optical sensor is insufficiently illuminated, the measured value may not satisfy standard
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| Terminal No. | Wire color | Signal name | Measuring condition | Reference value | ||
|---|---|---|---|---|---|---|
| Ignition switch | Operation or condition | |||||
| 20 | R | Headlamp low (RH) | ON | Lighting switch 2ND position | OFF | Approx. 0V |
| ON | Battery voltage | |||||
| 21 | R/L | Parking, license plate, and tail lamp | ON | Lighting switch 1ST position | OFF | Approx. 0V |
| ON | Battery voltage | |||||
| 27 | BR | Headlamp high (RH) | ON | Lighting switch HIGH or PASSING position | OFF | Approx. 0V |
| ON | Battery voltage | |||||
| 28 | R/Y | Headlamp high (LH) | ON | Lighting switch HIGH or PASSING position | OFF | Approx. 0V |
| ON | Battery voltage | |||||
| 30 | R/B | Headlamp low (LH) | ON | Lighting switch 2ND position | OFF | Approx. 0V |
| ON | Battery voltage | |||||
| 38 | B | Ground | ON | Approx. 0V | ||
| 49 | L | CAN - H | ||||
| 50 | P | CAN - L | ||||
| 51 | B | Ground | ON | Approx. 0V | ||
TERMINALS AND REFERENCE VALUES CHART