Terminals Of Ecu
- CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the 4B and 4E junction block connectors.
- Measure the resistance and voltage of the wire harness side connectors.RESISTANCE AND VOLTAGE SPECIFICATION
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition 4E-17 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω 4B-30 (BECU) - 4E-17 (GND1) L - W-B Battery (power supply) Always 11 to 14 V If the result is not as specified, there may be a malfunction in the wire harness.
- Reconnect the 4B and 4E junction block connectors.
- Measure the voltage of the wire harness side connectors.VOLTAGE SPECIFICATION
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition 4D-7 (KSW) - Body ground Y - Body ground Key unlock warning switch input Key inserted 11 to 14 V No key in ignition key cylinder Below 1 V 4A-21 (DCTY) - Body ground R - Body ground Driver side door courtesy light switch input Driver side door closed 11 to 14 V Driver side door open Below 1 V 4A-24 (PCTY) - Body ground L - Body ground Passenger side door courtesy light switch input Passenger side door closed 11 to 14 V Passenger side door open Below 1 V 4A-5 (RRCY) - Body ground G - Body ground Rear LH door courtesy light switch input Rear LH door closed 11 to 14 V Rear LH door open Below 1 V 4A-20 (RRCY) - Body ground L - Body ground Rear RH door courtesy light switch input Rear RH door closed 11 to 14 V Rear RH door open Below 1 V 4A-7 (BCTY) - Body ground SB - Body ground Back door courtesy light switch input Back side door closed 11 to 14 V Back side door open Below 1 V F38-2 (ACTD) - Body ground SB - Body ground Front door lock motor LH UNLOCK drive output Master switch (door control switch) or driver side door key cylinder OFF Below 1 V Master switch (door control switch) or driver side door key cylinder ON (UNLOCK) 11 to 14 V → Below 1 V 4H-8 (ACT+) - Body ground O - Body ground Door lock motor LOCK drive output Master switch (door control switch) or driver side door key cylinder OFF Below 1 V 4H-17 (ACT+) - Body ground W - Body ground 4A-3 (ACT+) - Body ground GR - Body ground Master switch (door control switch) or driver side door key cylinder ON (LOCK) 11 to 14 V → Below 1 V 4H-18 (ACT-) - Body ground
4A-4 (ACT-) - Body groundP - Body ground Door lock motor UNLOCK drive output Master switch (door control switch) or driver side door key cylinder OFF Below 1 V Master switch (door control switch) or driver side door key cylinder ON (UNLOCK) 11 to 14 V → Below 1 V F38-21 (LSWD) - Body ground L - Body ground Driver side door lock position switch input Driver side door UNLOCK Below 1 V Driver side door LOCK 11 to 14 V F38-5 (LSWP) - Body ground L - Body ground Passenger side door lock position switch input Passenger side door UNLOCK Below 1 V Passenger side door LOCK 11 to 14 V F38-17 (PRG) - Body ground W - Body ground Door control receiver output Transmitter switch ON → OFF (No key in ignition key cylinder, all doors closed) Pulse generation F38-16 (RDA) - Body ground R - Body ground Door control receiver input Transmitter switch ON → OFF (No key in ignition key cylinder, all doors closed) Pulse generation 4S-17 (HAZ) - Body ground B - Body ground Hazard warning light signal Answer-back ON Pulse generation Answer-back OFF Below 1 V F38-15 (BZR)-Body ground GR - Body ground Wireless door lock buzzer signal Answer-back ON Pulse generation Answer-back OFF Below 1 V 4B-28 (HORN) - Body ground LG - Body ground Vehicles horn signal Panic switch OFF 11 to 14 V Panic switch ON Pulse generation If the result is not as specified, the Main body ECU may have a malfunction.