Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)
(a) Disconnect the Q1 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 |
|---|---|---|---|---|
| Q1-1 (B) - Q1-2 (E) | L - W-B | Battery power supply | Always | 11 to 14 V |
| Q1-2 (E) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
(c) Reconnect the Q1 sliding roof ECU (sliding roof drive gear assembly) connector.
(d) 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 |
|---|---|---|---|---|
| Q1-10 (OPN) - Q1-2 (E) | BE - W-B | Sliding roof open switch input signal | Engine switch on (IG), sliding roof open switch on | Below 1 V |
| Q1-10 (OPN) - Q1-2 (E) | BE - W-B | Sliding roof open switch input signal | Engine switch on (IG), sliding roof open switch off | 11 to 14 V |
| Q1-8 (CLS) - Q1-2 (E) | W - W-B | Sliding roof close switch input signal | Engine switch on (IG), sliding roof close switch on | Below 1 V |
| Q1-8 (CLS) - Q1-2 (E) | W - W-B | Sliding roof close switch input signal | Engine switch on (IG), sliding roof close switch off | 11 to 14 V |
| Q1-4 (TILT) - Q1-2 (E) | P - W-B | Sliding roof tilt switch input signal | Engine switch on (IG), sliding roof tilt switch on | Below 1 V |
| Q1-4 (TILT) - Q1-2 (E) | P - W-B | Sliding roof tilt switch input signal | Engine switch on (IG), sliding roof tilt switch off | 11 to 14 V |
| Q1-9 (CLS) - Q1-2 (E) | R - W-B | Roof sunshade close switch input signal | Engine switch on (IG), roof sunshade close switch on | Below 1 V |
| Q1-9 (CLS) - Q1-2 (E) | R - W-B | Roof sunshade close switch input signal | Engine switch on (IG), roof sunshade close switch off | 11 to 14 V |
| Q1-5 (OPN) - Q1-2 (E) | G - W-B | Roof sunshade open switch input signal | Engine switch on (IG), roof sunshade open switch on | Below 1 V |
| Q1-5 (OPN) - Q1-2 (E) | G - W-B | Roof sunshade open switch input signal | Engine switch on (IG), roof sunshade open switch off | 11 to 14 V |
| Q1-7 (MPX1) - Body ground | B - Body ground | LIN communication line | Engine switch on (IG) | Pulse generation |
| Q1-3 (MPX2) - Body ground | Y - Body ground | LIN communication line | Engine switch on (IG) | Pulse generation |
CHECK ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)
(a) Disconnect the Q2 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 |
|---|---|---|---|---|
| Q2-1 (B) - Q2-2 (E) | G - W-B | Battery power supply | Always | 11 to 14 V |
| Q2-2 (E) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
(c) Reconnect the Q2 roof sunshade ECU (sliding roof drive gear assembly) connector.
(d) Check for pulses according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| Q2-3 (MPX2) - Body ground | Y - Body ground | LIN communication line | Engine switch on (IG) | Pulse generation |
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
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Parts Location
PARTS LOCATION ILLUSTRATION *1 FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for LH) *2 FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (for RH) *3 SLIDING ROOF SWITCH (MAP LIGHT SUB-ASSEMBLY) *4 SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) *5 COMBINATION METER ASSEMBLY
