Terminals Of Ecu [10/2013 - ]
WARNING: This page is about a different car, the 2014 Toyota Avalon. 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) Fig 1: Main Body ECU (Multiplex Network Body ECU) & Instrument Panel Junction Block Assembly Connector Terminal Identification (1 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*A Main Body ECU (Multiplex Network Body ECU) with 2 Connectors - - *1 Main Body ECU (Multiplex Network Body ECU) *2 2 Connectors Fig 2: Main Body ECU (Multiplex Network Body ECU) & Instrument Panel Junction Block Assembly Connector Terminal Identification (2 Of 2)Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*A Main Body ECU (Multiplex Network Body ECU) with 3 Connectors - - *1 Main Body ECU (Multiplex Network Body ECU) *2 3 Connectors - Remove the main body ECU (multiplex network body ECU). Refer to REMOVAL [10/2013 - ] .
- 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.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition MB-11(GND1) - Body ground - Ground Always Below 1 Ω MB-29 (ACC) - Body ground - ACC power supply Engine switch on (ACC) 11 to 14 V Engine switch off Below 1 V MB-30 (BECU) - Body ground - Battery power supply Always 11 to 14 V MB-31 (ALTB) - Body ground - Battery power supply Always 11 to 14 V MB-32 (IG) - Body ground - IG power supply Engine switch on (IG) 11 to 14 V Engine switch off Below 1 V If the result is not as specified, there may be a malfunction in the wire harness.
- Install the main body ECU (multiplex network body ECU). Refer to INSTALLATION [10/2013 - ] .
- Measure the voltage and check for pulses according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition D5-5 (TSW) - Body ground LG - Body ground Luggage door opening switch signal Luggage door opening switch on Below 1 V Engine switch off, all doors closed and luggage door opening switch off Pulse generation D6-12 (TMSW) - Body ground SB - Body ground Luggage door opening cancel switch signal Luggage door opening cancel switch on Below 1 V Engine switch off, all doors closed and luggage door opening cancel switch off Pulse generation 3C-9 (LGCY) - Body ground W - Body ground Luggage compartment door courtesy light switch assembly input signal Luggage compartment door open Below 1 V Luggage compartment door close 11 to 14 V 3C-10 (TR+) - Body ground R - Body ground Luggage compartment door lock relay output signal Luggage door opening switch on Below 1 V Luggage door opening switch off 11 to 14 V If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may be malfunctioning.
- CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the A28 and D64 certification ECU (smart key ECU assembly) connectors.
- Measure the resistance and voltage according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connectors disconnected.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A28-2 (+B) - Body ground W - Body ground Battery power supply Always 11 to 14 V A28-10 (CUTB) - Body ground L - Body ground Dark current cut fuse pin input signal Always 11 to 14 V A28-11 (E) - Body ground W - 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 A28 and D64 certification ECU (smart key ECU assembly) connectors.
- Measure the voltage and check for pulses according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition D64-5 (IG) - Body ground B - Body ground Ignition power supply Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V D65-27 (TSW5) - A28-11 (E) G - W Luggage electrical key switch input signal Engine switch on (IG), luggage compartment door is fully closed and luggage electrical key switch off Pulse generation If the result is not as specified, the certification ECU (smart key ECU assembly) may be malfunctioning.