Terminals Of Ecu
WARNING: This page is about a different car, the 2011 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
- Disconnect the 2F, F14 and 2D junction block connectors.
- Disconnect the A main body ECU (multiplex network body ECU) connector.
- Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
Tester Connection Wiring Color Terminal Description Condition Specified Condition 2D-6 (GND1) - Body ground BR - Body ground Ground Always Below 1 Ω 2F-40 (BECU) - Body ground G - Body ground Battery power supply Always 11 to 14 V F14-3 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω A-29 (ACC) - Body ground - ACC power supply Engine switch on (ACC) 11 to 14 V A-29 (ACC) - Body ground - ACC power supply Engine switch off Below 1 V A-31 (ALTB) - Body ground - Battery power supply Always 11 to 14 V A-32 (IG) - Body ground - Engine switch power supply Engine switch on (IG) 11 to 14 V A-32 (IG) - Body ground - Engine switch power supply Engine switch off Below 1 V If the result is not as specified, there may be a malfunction in the wire harness.
- Reconnect the 2F, F14 and 2D junction block connectors.
- Reconnect the A main body ECU (multiplex network body ECU) connector.
- Measure the voltage according to the value(s) in the table below.
Tester Connection Wiring Color Terminal Description Condition Specified Condition 2A-25 (GSW) - Body ground G - Body ground Center airbag sensor signal Engine switch on (IG) with the center airbag sensor assembly connector disconnected 2.8 to 4.3 V 2D-1 (ACT-) - Body ground R - Body ground Door lock motor unlock drive output (except driver side) Multiplex network master switch (door control switch) or driver side door key cylinder off Below 1 V 2D-1 (ACT-) - Body ground R - Body ground Door lock motor unlock drive output (except driver side) Multiplex network master switch (door control switch) or driver side door key cylinder unlocked 11 to 14 V 2D-3 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (all doors) Multiplex network master switch (door control switch) or driver side door key cylinder off Below 1 V 2D-3 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (all doors) Multiplex network master switch (door control switch) or driver side door key cylinder locked 11 to 14 V 2D-7 (ACTD) - Body ground R - Body ground Driver side door lock motor unlock drive output Multiplex network master switch (door control switch) or driver side door key cylinder off Below 1 V 2D-7 (ACTD) - Body ground R - Body ground Driver side door lock motor unlock drive output Multiplex network master switch (door control switch) or driver side door key cylinder unlocked 11 to 14 V 2D-26 (FRCY) - Body ground L - Body ground Front passenger side door courtesy switch input Front passenger side door open Below 1 V 2D-26 (FRCY) - Body ground L - Body ground Front passenger side door courtesy switch input Front passenger side door closed 11 to 14 V 2H-26 (FLCY) - Body ground B - Body ground Driver door courtesy switch input Driver door open Below 1 V 2H-26 (FLCY) - Body ground B - Body ground Driver side door courtesy switch input Driver door closed 11 to 14 V 2H-27 (LSWL) - Body ground Y - Body ground Rear door LH lock position switch input Rear door LH unlocked Below 1 V 2H-27 (LSWL) - Body ground Y - Body ground Rear door LH lock position switch input Engine switch off, all doors closed and rear door LH locked Pulse generation F12-3 (LCTY) - Body ground L - Body ground Rear door LH courtesy light switch input Rear door LH open Below 1 V F12-3 (LCTY) - Body ground L - Body ground Rear door LH courtesy light switch input Rear door LH closed 11 to 14 V F13-6 (RCTY) - Body ground GR - Body ground Rear door RH courtesy light switch input Rear door RH open Below 1 V F13-6 (RCTY) - Body ground GR - Body ground Rear door RH courtesy light switch input Rear door RH closed 11 to 14 V F13-7 (LSFL) - Body ground P - Body ground Driver door lock position switch input Driver door unlocked Below 1 V F13-7 (LSFL) - Body ground P - Body ground Driver door lock position switch input Engine switch off, all doors closed and driver door locked Pulse generation F13-9 (L1) - Body ground LG - Body ground Front passenger side door control switch input Front passenger side door control switch locked Below 1 V F13-9 (L1) - Body ground LG - Body ground Front passenger side door control switch input Front passenger side door control switch off Pulse generation F13-10 (UL1) - Body ground L - Body ground Front passenger side door control switch input Front passenger side door control switch unlocked Below 1 V F13-10 (UL1) - Body ground L - Body ground Front passenger side door control switch input Front passenger side door control switch off Pulse generation F13-11 (L2) - Body ground BR - Body ground Driver side door key-linked lock input Driver side door key cylinder turned to locked Below 1 V F13-11 (L2) - Body ground BR - Body ground Driver side door key-linked lock input Driver side door key cylinder off 11 to 14 V F13-18 (LSFR) - Body ground SB - Body ground Front passenger side door lock position switch input Front passenger side door unlocked Below 1 V F13-18 (LSFR) - Body ground SB - Body ground Front passenger side door lock position switch input Engine switch off, all doors closed and front passenger side door locked Pulse generation F13-19 (BCTY) - Body ground*1 R - Body ground Back door courtesy light switch input Back door open Below 1 V F13-19 (BCTY) - Body ground*1 R - Body ground Back door courtesy light switch input Back door closed 11 to 14 V F13-24 (UL3) - Body ground GR - Body ground Driver side door key-linked unlock input Driver side door key cylinder turned to unlocked Below 1 V F13-24 (UL3) - Body ground GR - Body ground Driver side door key-linked unlock input Driver side door key cylinder off 11 to 14 V F14-2 (LSWR) - Body ground B - Body ground Rear door RH lock position switch input Rear door RH unlocked Below 1 V F14-2 (LSWR) - Body ground B - Body ground Rear door RH lock position switch input Engine switch off, all doors closed and rear door RH locked 11 to 14 V - *1: w/o Power Back Door System
If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may have a malfunction.
- CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the F58 certification ECU (smart key ECU assembly) connector.
- Measure the resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
Tester Connection Wiring Color Terminal Description Condition Specified Condition F58-22 (TSW5) - Body ground L - Body ground Back door opener switch signal Back door opener switch on Below 1 Ω F58-22 (TSW5) - Body ground L - Body ground Back door opener switch signal Back door opener switch off 10 kΩ or higher If the result is not as specified, there may be a malfunction in the wire harness.
- Reconnect the F58 certification ECU (smart key ECU assembly) connector.
- Measure the voltage according to the value(s) in the table below.
Tester Connection Wiring Color Terminal Description Condition Specified Condition F58-22 (TSW5) - Body ground L - Body ground Back door opener switch signal Back door opener switch off Pulse generation F58-22 (TSW5) - Body ground L - Body ground Back door opener switch signal Back door opener switch on Below 1 V If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.
- CHECK POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) (w/ Power Back Door System)
- Disconnect the P33 power back door ECU (power back door motor unit) connector.
- Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
Tester Connection Wiring Color Terminal Description Condition Specified Condition P33-12 (B) - Body ground Y - Body ground Battery power supply Always 11 to 14 V P33-10 (ECUB) - Body ground BR - Body ground Battery power supply Always 11 to 14 V P33-8 (IG) - Body ground SB - Body ground IG power supply Engine switch on (IG) 11 to 14 V P33-8 (IG) - Body ground SB - Body ground IG power supply Engine switch off Below 1 V P33-11 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω If the result is not as specified, there may be a malfunction in the wire harness.
- Reconnect the P33 power back door ECU (power back door motor unit) connector.
- Initialize the power back door ECU (power back door motor unit). Refer to INITIALIZATION .
- Measure the voltage according to the value(s) in the table below.
Tester Connection Wiring Color Terminal Description Condition Specified Condition P33-20 (FUL) - Body ground P - Body ground Back door courtesy switch circuit Back door closed 11 to 14 V P33-20 (FUL) - Body ground P - Body ground Back door courtesy switch circuit Back door open Below 1 V If the result is not as specified, the power back door ECU (power back door motor unit) may have a malfunction.