CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY
Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Reconnect the power distribution box assembly connector.
Measure the voltage and resistance according to the value(s) in the table below.
Measure the values on the wire harness side with the connectors connected.
| Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
|---|---|---|---|
| MB-13 (GND1) - Body ground | Ground | Always | Below 1 Ω |
| MB-14 (GND2) - Body ground | Ground | Always | Below 1 Ω |
| MB-26 (BECU) - Body ground | Auxiliary battery power supply | Ignition switch off | 11 to 14 V |
| MB-27 (IGR) - Body ground | IG power supply | Ignition switch ON | 11 to 14 V |
Install the main body ECU (multiplex network body ECU) to power distribution box assembly.
Measure the voltage and check for pulses according to the value(s) in the table below.
| Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
|---|---|---|---|
| 10G-22 (FRCY) - Body ground | Front door courtesy light switch (for RH) input | Front door RH open → closed | Below 1 V → 11 to 14 V or pulse output (maximum 14 V)* |
| 10G-23 (FLCY) - Body ground | Front door courtesy light switch (for LH) input | Front door LH open → closed | Below 1 V → 11 to 14 V or pulse output (maximum 14 V)* |
| 10G-27 (RCTY) - Body ground | Rear door courtesy light switch (for RH) input | Rear door RH open → closed | Below 1 V → 11 to 14 V or pulse output (maximum 14 V)* |
| 10G-18 (LCTY) - Body ground | Rear door courtesy light switch (for LH) input | Rear door LH open → closed | Below 1 V → 11 to 14 V or pulse output (maximum 14 V)* |
| 10G-5 (LGCY) -Body ground | Luggage compartment door courtesy light switch input | Luggage compartment door open → closed | Below 1 V → 11 to 14 V or pulse output (maximum 14 V)* |
| 10G-32 (TR+) - Body ground | Luggage compartment door motor drive output | Luggage compartment door closed → open | Below 1 V → 11 to 14 V → Below 1 V |
| 10E-7 (ACTD) - Body ground | Door lock motor unlock drive output | Door control switch or driver door key cylinder off → on (unlock) | Below 1 V → 11 to 14 V → Below 1 V |
| 10G-34 (ACT-) - Body ground | |||
| 10G-35 (ACT-) - Body ground | |||
| 10G-37 (ACT+) - Body ground | Door lock motor lock drive output | Door control switch or driver door key cylinder off → on (lock) | Below 1 V → 11 to 14 V → Below 1 V |
| I85-3 (LSFR) - Body ground | Front door RH unlock detection switch input | Front door RH unlocked → locked | Below 1 V → 11 to 14 V or pulse output (maximum 14 V)* |
| I85-9 (LSFL) - Body ground | Front door LH unlock detection switch input | Front door LH unlocked → locked | Below 1 V → 11 to 14 V or pulse output (maximum 14 V)* |
| I86-23 (LSWR) - Body ground | Rear door RH unlock detection switch input | Rear door RH unlocked → locked | Below 1 V → 11 to 14 V or pulse output (maximum 14 V)* |
| I85-10 (LSWL) - Body ground | Rear door LH unlock detection switch input | Rear door LH unlocked → locked | Below 1 V → 11 to 14 V or pulse output (maximum 14 V)* |
| I85-28 (L2) - Body ground | Driver door key-linked lock input | Driver door key cylinder turned to lock | Below 1 V |
| Driver door key cylinder not turned | Pulse generation | ||
| I85-4 (UL3) - Body ground | Driver door key-linked unlock input | Driver door key cylinder turned to unlock | Below 1 V |
| Driver door key cylinder not turned | Pulse generation | ||
| I85-16 (KSW) - Body ground | Unlock warning switch input | No key in ignition key cylinder | 11 to 14 V |
| Key in ignition key cylinder | Below 1 V | ||
| I85-18 (RDA) - Body ground | Input from door control and tire pressure monitoring system receiver assembly | Procedure:
1.
Remove key from ignition key cylinder 2.
Close all doors 3.
Press lock or unlock switch of door control transmitter assembly |
11 to 14 V → Pulse generation |
| I85-17 (PRG) - Body ground | Output to door control and tire pressure monitoring system receiver assembly | Key inserted into ignition key cylinder → Key pulled out of ignition key cylinder | 11 to 14 V → Pulse generation → 11 to 14 V |
*: Differs depending on the vehicle model