Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Terminals Of Ecu
TERMINALS OF ECU
CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)
(a) Disconnect the U2 sliding roof ECU (sliding roof drive gear assembly) connector.
(b) 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 connector disconnected.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| U2-1 (B) - U2-2 (E) | P - W-B | Battery power supply | Always | 11 to 14 V |
| U2-6 (IG) - U2-2 (E) | B - W-B | IG power supply | Engine switch off | Below 1 V |
| U2-6 (IG) - U2-2 (E) | B - W-B | IG power supply | Engine switch on (IG) | 11 to 14 V |
| U2-2 (E) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
(c) Reconnect the U2 sliding roof ECU (sliding roof drive gear assembly) connector.
(d) Measure the voltage according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| U2-10 (OPN) - U2-2 (E) | L - W-B | Sliding roof open switch input signal | Engine switch on (IG), sliding roof open switch on | Below 1 V |
| U2-10 (OPN) - U2-2 (E) | L - W-B | Sliding roof open switch input signal | Engine switch on (IG), sliding roof open switch off | 11 to 14 V |
| U2-8 (CLS) - U2-2 (E) | P - W-B | Sliding roof close switch input signal | Engine switch on (IG), sliding roof close switch on | Below 1 V |
| U2-8 (CLS) - U2-2 (E) | P - W-B | Sliding roof close switch input signal | Engine switch on (IG), sliding roof close switch off | 11 to 14 V |
| U2-4 (TILT) - U2-2 (E) | G - W-B | Sliding roof tilt switch input signal | Engine switch on (IG), sliding roof tilt switch on | Below 1 V |
| U2-4 (TILT) - U2-2 (E) | G - W-B | Sliding roof tilt switch input signal | Engine switch on (IG), sliding roof tilt switch off | 11 to 14 V |
| U2-9 (CLS) - U2-2 (E) | R - W-B | Roof sunshade close switch input signal | Engine switch on (IG), roof sunshade close switch on | Below 1 V |
| U2-9 (CLS) - U2-2 (E) | R - W-B | Roof sunshade close switch input signal | Engine switch on (IG), roof sunshade close switch off | 11 to 14 V |
| U2-5 (OPN) - U2-2 (E) | W - W-B | Roof sunshade open switch input signal | Engine switch on (IG), roof sunshade open switch on | Below 1 V |
| U2-5 (OPN) - U2-2 (E) | W - W-B | Roof sunshade open switch input signal | Engine switch on (IG), roof sunshade open switch off | 11 to 14 V |
CHECK ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)
(a) Disconnect the w1 roof sunshade ECU (sliding roof drive gear assembly) connector.
(b) 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 connector disconnected.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| w1-1 (+B) - w1-2 (E) | R - B | Battery power supply | Always | 11 to 14 V |
| w1-6 (IG) - w1-2 (E) | V - B | IG power supply | Engine switch off | Below 1 V |
| w1-6 (IG) - w1-2 (E) | V - B | IG power supply | Engine switch on (IG) | 11 to 14 V |
| w1-2 (E) - Body ground | B - Body ground | Ground | Always | Below 1 Ω |
(c) Reconnect the w1 roof sunshade ECU (sliding roof drive gear assembly) connector.
(d) Measure the voltage according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| w1-10 (OPN) - w1-2 (E) | G - B | Sliding roof open switch input signal | Engine switch on (IG), sliding roof open switch on | Below 1 V |
| w1-10 (OPN) - w1-2 (E) | G - B | Sliding roof open switch input signal | Engine switch on (IG), sliding roof open switch off | 11 to 14 V |
| w1-8 (CLS) - w1-2 (E) | L - B | Sliding roof close switch input signal | Engine switch on (IG), sliding roof close switch on | Below 1 V |
| w1-8 (CLS) - w1-2 (E) | L- B | Sliding roof close switch input signal | Engine switch on (IG), sliding roof close switch off | 11 to 14 V |
| w1-4 (VENT) - w1-2 (E) | Y - B | Sliding roof tilt switch input signal | Engine switch on (IG), sliding roof tilt switch on | Below 1 V |
| w1-4 (VENT) - w1-2 (E) | Y - B | Sliding roof tilt switch input signal | Engine switch on (IG), sliding roof tilt switch off | 11 to 14 V |
| w1-9 (CLS) - w1-2 (E) | GR - B | Roof sunshade close switch input signal | Engine switch on (IG), roof sunshade close switch on | Below 1 V |
| w1-9 (CLS) - w1-2 (E) | GR - B | Roof sunshade close switch input signal | Engine switch on (IG), roof sunshade close switch off | 11 to 14 V |
| w1-5 (OPN) - w1-2 (E) | BR - B | Roof sunshade open switch input signal | Engine switch on (IG), roof sunshade open switch on | Below 1 V |
| w1-5 (OPN) - w1-2 (E) | BR - B | Roof sunshade open switch input signal | Engine switch on (IG), roof sunshade open switch off | 11 to 14 V |
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
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Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) Panoramic moon roof system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3). When the system seems to be malfuncti ...
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Sliding Roof or Sli ...
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Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > How To Troubleshoot Ecu Controlled Systems: Electronic Circuit Inspection Procedure
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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