ELECTRIC POWER CONTROL SYSTEM TERMINALS OF ECU
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CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (NETWORK GATEWAY ECU)
Text in Illustration *1 Instrument Panel Junction Block Assembly *2 Main Body ECU (Network Gateway ECU)
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Measure the voltage and resistance according to the value(s) in the table below.
Tech Tips
With the connectors connected, inspect from the rear side of the connectors.
Terminal No.
(Symbol)
Wiring Color Terminal Description Condition Specified Condition 3A-15 - Body ground W - Body ground IG power supply Ignition switch ON 11 to 14V 3A-20 - Body ground SB - Body ground ACC power supply Ignition switch ACC 11 to 14V 3A-27 - Body ground G-R - Body ground Battery power supply Always 11 to 14V 3C-19 - Body ground L-R - Body ground Battery power supply Always 11 to 14V 3E-1 - Body ground B-R - Body ground Battery power supply Always 11 to 14V 3A-12 - Body ground B - Body ground Ground Always Below 1 Ω 3A-13 - Body ground B - Body ground Ground Always Below 1 Ω 3B-18 - Body ground B-Y - Body ground Ground Always Below 1 Ω D6-1 (GND) - Body ground B - Body ground Ground Always Below 1 Ω A73-4 (GND) - Body ground B-Y - Body ground Ground Always Below 1 Ω -
Remove the main body ECU (network gateway ECU) from the instrument panel junction block assembly.
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Measure the voltage and resistance according to the value(s) in the table below.
Terminal No.
(Symbol)
Wiring Color Terminal Description Condition Specified Condition MB-1 (BECU) - Body ground None - Body ground Battery power supply back up voltage Always 11 to 14V MB-8 (IG) - Body ground None - Body ground IG power supply Ignition switch ON 11 to 14V MB-9 (ACC) - Body ground None - Body ground ACC power supply Ignition switch ACC 11 to 14V MB-32 (BMPX) - Body ground None - Body ground Battery power supply control voltage Always 11 to 14V MB-11 (GND) - Body ground None - Body ground Ground Always Below 1 Ω
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