Terminals Of Ecu
WARNING: This page is about a different car, the 2004 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the 1C, 1J, 1L, 1K, 1P, B6, B7 and B9 J/B connectors.
- Check the voltage and resistance between each terminal of the wire harness side connectors and the body ground.
Standard:
TERMINAL/ SPECIFIED CONDITIONTerminal No. Wiring Color Condition Specified Condition 1L-7 (BECU) - Body ground W-L - Body ground Constant 10 to 14 V 1C-24 (BECU) - Body ground W-L - Body ground Constant 10 to 14 V 1C-30 (ALTB) - Body ground B - Body ground Constant 10 to 14 V 1L-16 (GND1) - Body ground W-B - Body ground Constant Below 1 Ω 1K-17 (GND2) - Body ground W-B - Body ground Constant Below 1 Ω 1K-25, 1J-3 (L1) - Body ground R-Y - Body ground Door control switch (Master switch or passenger side) OFF -->LOCK 10 kΩ or higher --> Below 1 Ω 1K-22, 1J-4 (UL1) - Body ground G - Body ground Door control switch (Master switch or passenger side) OFF --> UNLOCK 10 kΩ or higher --> Below 1 Ω 1K-26 (L2) - Body ground LG - Body ground Driver side door key cylinder OFF --> LOCK 10 kΩ or higher --> Below 1 Ω 1J-5 (L2) - Body ground LG - Body ground Passenger side door key cylinder OFF --> LOCK 10 kΩ or higher --> Below 1 B9-8 (UL3) - Body ground L - Body ground Driver side door key cylinder OFF --> UNLOCK 10 kΩ or higher --> Below 1 Ω B7-4 (UL2) - Body ground L-Y - Body ground Passenger side door key cylinder OFF --> UNLOCK 10 kΩ or higher --> Below 1 Ω B9-14 (DCTY) - Body ground R-Y - Body ground Driver side door CLOSED --> OPEN 10 kΩ or higher --> Below 1 Ω B7-23 (PCTY) - Body ground R-Y - Body ground Passenger side door CLOSED --> OPEN 10 kΩ or higher --> Below 1 Ω B9-16 (RCTY) - Body ground R-W - Body ground Rear door RH CLOSED --> OPEN 10 kΩ or higher --> Below 1 Ω 1P-19 (LCTY) - Body ground GR - Body ground Rear door LH CLOSED --> OPEN 10 kΩ or higher --> Below 1 Ω B7-25 (BCTY) - Body ground G-W - Body ground Back door CLOSED --> OPEN 10 kΩ or higher --> Below 1 Ω B6-21 (KSW) - Body ground L-B - Body ground No key in ignition key cylinder --> Key inserted 10 kΩ or higher --> Below 1 Ω B7-3 (DBSU)(1) - Body ground G-B - Body ground Back door opener switch OFF --> ON 10 kΩ or higher --> Below 1 Ω (1) w/o Power back door If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the connectors, and check the voltage between each terminal of the connectors and the body ground.
Standard:
NOTE: * w/o Power back doorUse an oscilloscope to check the output voltages of the terminals LSWD, LSWP, LSWL and LSWR. If the result is not as specified, the J/B assy (body ECU) may have a malfunction.
- w/ Power back door:
CHECK POWER BACK DOOR ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the P13 and P14 ECU connectors, and check the voltage or resistance of each terminal of the wire harness side connectors.
Standard:
TERMINAL SPECIFIED CONDITIONTerminal No. Wiring Color Condition Specified Condition P14-2 (B) - Body ground B-R - Body ground Constant 10 to 14 V P13-10 (BECU) - Body ground W-L - Body ground Constant 10 to 14 V P13-9 (IG) - Body ground B-R - Body ground Ignition switch OFF --> ON 0 V --> 10 to 14 V P14-8 (GND) - Body ground W-B - Body ground Constant Below 1 Ω P13-3 (HSW) - Body ground G-B - Body ground Back door opener switch OFF --> ON 10 kΩ or higher --> Below 1 Ω If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the ECU connectors, and check the voltage of each terminal of the connectors.
Standard:
If the result is not as specified, the ECU may have a malfunction.
- Disconnect the P13 and P14 ECU connectors, and check the voltage or resistance of each terminal of the wire harness side connectors.