Lexus NX: Terminals Of Ecu
TERMINALS OF ECU
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU), INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
| *1 | Main Body ECU (Multiplex Network Body ECU) | - | - |
(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
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(b) Measure the voltage and resistance according to the value(s) in the table below.
| Tester Connection | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| 4F-1 - Body ground | B - Body ground | Power source | Power switch off | 11 to 14 V |
| A-32 (IG) - Body ground | None - Body ground | Power source (IG) | Power switch off → on (IG) | Below 1 V → 11 to 14 V |
| A-30 (ACC) - Body ground | None - Body ground | Power source (ACC) | Power switch off → on (ACC) | Below 1 V → 11 to 14 V |
| A-31 (BECU) - Body ground | None - Body ground | Power source | Power switch off | 11 to 14 V |
| A-11 (GND1) - Body ground | None - Body ground | Ground | Always | Below 1 Ω |
(c) Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.
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(d) Measure the voltage according to the value(s) in the table below.
| Tester Connection | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| I47-14 (RET) - Body ground | G - Body ground | Outer mirror switch assembly signal | Outer mirror switch assembly (mirror retract switch) return position → retract position | Below 1 V → 11 to 14 V |
| I47-15 (RTR) - Body ground | LG - Body ground | Outer mirror switch assembly signal | Outer mirror switch assembly (mirror retract switch) retract position → return position | Below 1 V → 11 to 14 V |
| I47-19 (RETR) - Body ground | L - Body ground | E-MIR2 relay drive signal | Retract function is operating → retract function is not operating | Below 1 V → 11 to 14 V |
| I47-20 (RTRR) - Body ground | GR - Body ground | E-MIR1 relay drive signal | Return function is operating → return function is not operating | Below 1 V → 11 to 14 V |
CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
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CHECK AIR CONDITIONING CONTROL ASSEMBLY
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