Check At Multi-Center Display Unit Terminal
MULTI-CENTER DISPLAY UNIT TERMINALS VOLTAGE SPECIFICATION
| TERMINAL NO. | INPUT/OUTPUT | SIGNAL SYMBOL | TERMINAL VOLTAGE (V) | HARNESS DISCREPANCY | FAILURE SYMPTOM DUE TO HARNESS DISCREPANCY | |
|---|---|---|---|---|---|---|
| 1 | Input | Battery (Battery power supply) | Battery positive voltage | Open circuit | - | Screen is not displayed. All operations are not possible. |
| - | Short circuit | Fuse is blown. | ||||
| 2 | Input | Ignition switch (IG1) | Battery positive voltage | Open circuit | - | Screen is not displayed. All operations are not possible. |
| - | Short circuit | Fuse is blown. | ||||
| 3 | Input | Ignition switch (ACC) | Battery positive voltage | Open circuit | - | Screen is not displayed. All operations are not possible. |
| - | Short circuit | Fuse is blown. | ||||
| 4 | Input | ILL + (lighting switch) | Hi: Battery positive voltage Lo: 0 - 1 | Open circuit | Short circuit | Not lighted. |
| 5 | Output | ILL - (illumination light control signal) | 0.4 | Open circuit | Short circuit | display brightness control is not possible. |
| 6 | - | GND | 0 | Open circuit | - | Screen is not displayed. |
| 7 | Input/output | SB3 | - | - | - | - |
| 8 | Input/output | M-DATA (Audio) (M-BUS data signal) |
|
Open circuit | Short circuit | Low grade type
Middle grade type
|
| 9 | Input/output | M-CLOCK (A/C) (M-BUS clock signal) |
|
Open circuit | Short circuit | Low grade type
Middle grade type
|
| 10 | Input/output | M-BUSY (Audio) |
|
Open circuit | Short circuit | Low grade type
Middle grade type
|
| 14 - 20 | No connection | |||||