Telematics Communication Unit Inspection
- Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
- Remove the following parts:
- Passenger side lower panel (See PASSENGER-SIDE LOWER PANEL REMOVAL/INSTALLATION .)
- Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
- Measure the voltage at each terminal.
- If the voltage is not as specified in the terminal voltage table, inspect the parts under Inspection item(s) and related wiring harnesses.
- If the system does not work normally even though the inspection items or related wiring harnesses do not have any malfunction, replace the telematics communication unit. (See TELEMATICS COMMUNICATION UNIT REMOVAL/INSTALLATION .)
- If the voltage is not as specified in the terminal voltage table, inspect the parts under Inspection item(s) and related wiring harnesses.
Terminal Voltage Table (Reference)
TERMINAL VOLTAGE REFERENCE
| Terminal | Signal name | Connected to | Measurement conditions | Voltage (V) | Inspection item(s) |
|---|---|---|---|---|---|
| 1A | - | - | - | - | - |
| 1B | - | - | - | - | - |
| 1C | - | - | - | - | - |
| 1D | - | - | - | - | - |
| 1E | - | - | - | - | - |
| 1F | - | - | - | - | - |
| 1G | - | - | - | - | - |
| 1H | - | - | - | - | - |
| 1I | - | - | - | - | - |
| 1J | - | - | - | - | - |
| 1K | - | - | - | - | - |
| 1L | - | - | - | - | - |
| 1M | - | - | - | - | - |
| 1N | - | - | - | - | - |
| 1O | GND1 | Body ground | Under any condition | Approx. 0 |
|
| 1P | - | - | - | - | - |
| 1Q | HS CAN_H | CAN system related module | Because this terminal is for communication, determination using terminal voltage inspection is not possible. | ||
| 1R | GND3 | Body ground | Under any condition | Approx. 0 |
|
| 1S | HS CAN_L | CAN system related module | Because this terminal is for communication, determination using terminal voltage inspection is not possible. | ||
| 1T | GND4 | Body ground | Under any condition | Approx. 0 |
|
| 1U | GND2 | Body ground | Under any condition | Approx. 0 |
|
| 1V | - | - | - | - | - |
| 1W | - | - | - | - | - |
| 1X | - | - | - | - | - |
| 1Y | - | - | - | - | - |
| 1Z | - | - | - | - | - |
| 1AA | ENS2_IN | SAS control module | Because this terminal is for communication, determination using terminal voltage inspection is not possible. | ||
| 1AB | - | - | - | - | - |
| 1AC | ENS2_OUT | Electrical supply unit (ESU) | Because this terminal is for communication, determination using terminal voltage inspection is not possible. | ||
| 1AD | - | - | - | - | - |
| 1AE | IG1 | F48 7.5A fuse | Switch the ignition ON (engine on or off) | B+ |
|
| Switch the ignition OFF (LOCK) | 1.0 or less | ||||
| 1AF | +B | F46 15 A fuse | Under any condition | B+ |
|
| 2A | TEL_SIG1 | Tel antenna No. 1 | Because this terminal is for communication, determination using terminal voltage inspection is not possible. | ||
| 2B | GNSS_SIG1 | Tel antenna No. 1 | Because this terminal is for communication, determination using terminal voltage inspection is not possible. | ||
| 3A | TEL_SIG2 | Tel antenna No. 2 | Because this terminal is for communication, determination using terminal voltage inspection is not possible. | ||
| 4A | USB1_GND | Connectivity master unit | Under any condition | 1.0 or less |
|
| 4B | USB1_DATA_P | Connectivity master unit | Because this terminal is for communication, determination using terminal voltage inspection is not possible. | ||
| 4C | USB1_VBUS | Connectivity master unit | Under any condition | Approx. 5.0 |
|
| 4D | USB1_DATA_N | Connectivity master unit | Because this terminal is for communication, determination using terminal voltage inspection is not possible. | ||