Terminals Of Ecu
WARNING: This page is about a different variant/trim than selected.
- CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
- Disconnect the 2B and 2C junction block connectors.
- Disconnect the MB main body ECU (multiplex network body ECU) connectors.
- 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 connectors disconnected.
Tester Connection Wiring Color Terminal Description Condition Specified Condition 2B-6 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω 2C-18 (BECU) - Body ground Y - Body ground Auxiliary battery power supply Power switch off 11 to 14 V MB-29 (ACC) - Body ground - ACC power supply Power switch on (ACC) 11 to 14 V MB-29 (ACC) - Body ground - ACC power supply Power switch off Below 1 V MB-31 (ALTB) - Body ground - Auxiliary battery power supply Power switch off 11 to 14 V MB-32 (IG) - Body ground - Power switch power supply Power switch on (IG) 11 to 14 V MB-32 (IG) - Body ground - Power switch power supply Power switch off Below 1 V If the result is not as specified, there may be a malfunction in the wire harness.
- Reconnect the 2B and 2C junction block connectors.
- Reconnect the MB main body ECU (multiplex network body ECU) connectors.
- Measure the voltage according to the value(s) in the table below.
Tester Connection Wiring Color Terminal Description Condition Specified Condition 2B-1 (ACT-) - Body ground B - Body ground Door lock motor unlock drive output (except driver door) Driver or front passenger side door control switch off Below 1 V 2B-1 (ACT-) - Body ground B - Body ground Door lock motor unlock drive output (except driver door) Driver or front passenger side door control switch unlocked 11 to 14 V 2B-8 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (all doors) Driver or front passenger side door control switch off Below 1 V 2B-8 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (all doors) Driver or front passenger side door control switch locked 11 to 14 V 2B-5 (ACTD) - Body ground B - Body ground Driver side door lock motor unlock drive output Driver or front passenger side door control switch off Below 1 V 2B-5 (ACTD) - Body ground B - Body ground Driver side door lock motor unlock drive output Driver or front passenger side door control switch unlocked 11 to 14 V 2D-36 (FRCY) - Body ground BR - Body ground Front passenger side door courtesy switch input Front passenger side door open Below 1 V 2D-36 (FRCY) - Body ground BR - Body ground Front passenger side door courtesy switch input Front passenger side door closed 11 to 14 V 2D-35 (FLCY) - Body ground V - Body ground Driver side door courtesy switch input Driver door open Below 1 V 2D-35 (FLCY) - Body ground V - Body ground Driver side door courtesy switch input Driver door closed 11 to 14 V 2D-25 (LSR) - Body ground GR - Body ground Rear door LH lock position switch input Rear door LH unlocked Below 1 V 2D-25 (LSR) - Body ground GR - Body ground Rear door LH lock position switch input Power switch off, all doors closed and rear door LH locked 11 to 14 V 2B-29 (LSR) - Body ground GR - Body ground Rear door RH lock position switch input Rear door RH unlocked Below 1 V 2B-29 (LSR) - Body ground GR - Body ground Rear door RH lock position switch input Power switch off, all doors closed and rear door RH locked 11 to 14 V L7-6 (LRCY) - Body ground G - Body ground Rear door courtesy light switch input Rear door open Below 1 V L7-6 (LRCY) - Body ground G - Body ground Rear door courtesy light switch input Rear door closed 11 to 14 V L7-7 (LSFL) - Body ground GR - Body ground Driver door lock position switch input Driver door unlocked Below 1 V L7-7 (LSFL) - Body ground GR - Body ground Driver door lock position switch input Power switch off, all doors closed and driver door locked 11 to 14 V L7-9 (L1) - Body ground LG - Body ground Front passenger side door control switch input Front passenger side door control switch locked Below 1 V L7-9 (L1) - Body ground LG - Body ground Front passenger side door control switch input Front passenger side door control switch off 11 to 14 V L7-10 (UL1) - Body ground BR - Body ground Front passenger side door control switch input Front passenger side door control switch unlocked Below 1 V L7-10 (UL1) - Body ground BR - Body ground Front passenger side door control switch input Front passenger side door control switch off 11 to 14 V L7-11 (L2) - Body ground G - Body ground Driver door key-linked lock input Driver door key cylinder turned to lock Below 1 V L7-11 (L2) - Body ground G - Body ground Driver door key-linked lock input Driver door key cylinder off 11 to 14 V L7-18 (LSFR) - Body ground LG - Body ground Front passenger side door lock position switch input Front passenger side door unlocked Below 1 V L7-18 (LSFR) - Body ground LG - Body ground Front passenger side door lock position switch input Power switch off, all doors closed and front passenger side door locked 11 to 14 V L7-19 (BCTY) - Body ground L - Body ground Back door courtesy light switch input Back door open Below 1 V L7-19 (BCTY) - Body ground L - Body ground Back door courtesy light switch input Back door closed 11 to 14 V L7-23 (BDSU) - Body ground*1 GR - Body ground Back door opener switch input Back door opener switch pushed Below 1 V L7-23 (BDSU) - Body ground*1 GR - Body ground Back door opener switch input Back door opener switch not pushed 11 to 14 V L7-24 (UL3) - Body ground V - Body ground Driver door key-linked unlock input Driver door key cylinder turned to unlock Below 1 V L7-24 (UL3) - Body ground V - Body ground Driver door key-linked unlock input Driver door key cylinder off 11 to 14 V - *1: w/o Entry System Back Door Open Function
If the result is not as specified, the main body ECU (multiplex network body ECU) may have a malfunction.
- CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Entry System Back Door Open Function)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the L62 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 L62-22 (TSW5) - Body ground GR - Body ground Back door opener switch signal Back door opener switch on Below 1 Ω L62-22 (TSW5) - Body ground GR - 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 L62 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 L62-22 (TSW5) - Body ground GR - Body ground Back door opener switch signal Back door opener switch off 9 to 14 V
(Pulse Generation)L62-22 (TSW5) - Body ground GR - 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.