Lexus IS250 IS220d GSE20 ALE20 - WINDSHIELD / WINDOWGLASS
POWER WINDOW CONTROL SYSTEM - TERMINALS OF ECU
| MULTIPLEX NETWORK MASTER SWITCH (DRIVER) |
Disconnect the M7 (L17) switch connector.
Measure the voltage and resistance of each terminal according to the value(s) in the table below.
- Resistance:
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (2) - Body ground W-B - Body ground Ground Always Below 1 Ω
- Voltage:
Symbols (Terminal No.) Wiring Color Terminal Description Always Specified Condition BDR (10) - GND (2) L - W-B +B power supply Always 10 to 14 V CPUB (9) - GND (2) G - W-B +B power supply Always 10 to 14 V SIG (20) - GND (2) B - W-B Ignition power supply Engine switch OFF → ON (IG) 0 V → 10 to 14 V
If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the M7 (L17) switch connector and reset the power window motor.
Measure the voltage according to the value(s) in the table below.
- Voltage:
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition UP (1) - GND (2) R - W-B Power window motor UP output Engine switch on (IG), driver side power window switch OFF → UP (Manual operation) 0 V → 10 to 14 V UP (1) - GND (2) R - W-B Power window motor UP output Engine switch on (IG), driver side power window fully open → driver side power window switch UP (AUTO operation) → driver side power window fully closed 0 V → 10 to 14 V → 0 V DN (11) - GND (2) G - W-B Power window motor DOWN output Engine switch on (IG), driver side power window switch OFF → DOWN (Manual operation) 10 to 14 V → 0 V DN (11) - GND (2) G - W-B Power window motor DOWN output Engine switch on (IG), driver side power window fully closed → driver side power window switch DOWN (AUTO operation) → driver side power window fully open 10 to 14 V → 0 V PWS (6) - GND (2) P - W-B Power window lock switch output Engine switch on (IG), power window lock switch UNLOCK → LOCK 10 to 14 V → 0 V VCC (19) - GND (2) LG - W-B Power window motor power source Engine switch on (IG), driver side power window switch OFF → UP or OFF → DOWN 0 V → 10 to 14 V
If the result is not as specified, there may be a malfunction on the wire harness side.
| CHECK MULTIPLEX NETWORK SWITCH (FRONT PASSENGER SIDE) |
Disconnect the M16 (L13) switch connector.
Measure the voltage and resistance according to the value(s) in the table below.
- Resistance:
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (7) - Body ground W-B - Body ground Ground Always Below 1 Ω
- Voltage:
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition BDR (12) - GND (7) L - W-B +B power supply Always 10 to 14 V
If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the M16 (L13) switch connector and reset the power window motor.
Measure the voltage according to the value(s) in the table below.
- Voltage:
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition UP (6) - GND (7) R - W-B Power window motor UP output Engine switch on (IG), front passenger side power window switch OFF → UP (Manual operation) 0 V → 10 to 14 V UP (6) - GND (7) R - W-B Power window motor UP output Engine switch on (IG), front passenger side power window fully open → front passenger side power switch UP (AUTO operation) → front passenger side power window fully closed 0 V → 10 to 14 V → 0 V DN (1) - GND (7) G - W-B Power window motor DOWN output Engine switch on (IG), front passenger side power window switch OFF → DOWN (Manual operation) 10 to 14 V → 0 V DN (1) - GND (7) G - W-B Power window motor DOWN output Engine switch on (IG), front passenger side power window fully closed → front passenger side power window switch DOWN (AUTO operation) → front passenger side power window fully open 10 to 14 V → 0 V PCT (11) - GND (7) P - W-B Power window lock switch output Engine switch on (IG), power window lock switch UNLOCK → LOCK 10 to 14 V → 0 V VCC (5) - SGND (8) W - L Power window motor power source Engine switch on (IG), front passenger side power window switch OFF → UP or OFF → DOWN 0 V → 10 to 14 V
If the result is not as specified, the multiplex network switch may have a malfunction.
| CHECK MULTIPLEX NETWORK SWITCH (REAR LH) |
Disconnect the O1 switch connector.
Measure the voltage and resistance according to the value(s) in the table below.
- Resistance:
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (O1-7) - Body ground W-B - Body ground Ground Always Below 1 Ω SEL2 (O1-10) - GND (O1-7) W-B - W-B Terminal for identification of rear LH switch Always Below 1 Ω
- Voltage:
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition BDR (O1-12) - GND (O1-7) O - W-B +B power supply Always 10 to 14 V
If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the O1 switch connector and reset the power window motor.
Measure the voltage according to the value(s) in the table below.
- Voltage:
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition UP (O1-6) - GND (O1-7) R - W-B Power window motor UP output Engine switch on (IG), rear LH power window switch OFF → UP (Manual operation) 0 V → 10 to 14 V UP (O1-6) - GND (O1-7) R - W-B Power window motor UP output Engine switch on (IG), rear LH power window fully open → rear LH power window switch UP (AUTO operation) → rear LH power window fully closed 0 V → 10 to 14 V → 0 V DN (O1-1) - GND (O1-7) G - W-B Power window motor DOWN output Engine switch on (IG), rear LH power window switch OFF → DOWN (Manual operation) 10 to 14 V → 0 V DN (O1-1) - GND (O1-7) G - W-B Power window motor DOWN output Engine switch on (IG), rear LH power window fully closed → rear LH power window switch DOWN (AUTO operation) → rear LH power window fully open 10 to 14 V → 0 V PCT1 (O1-11) - GND (O1-7) V - W-B Power window lock switch output Engine switch on (IG), Power window lock switch UNLOCK → LOCK 10 to 14 V → 0 V VCC (O1-5) - SGND (O1-8) W - LG Power window motor power source Engine switch on (IG), rear LH side power window switch OFF → UP or OFF → DOWN 0 V → 10 to 14 V
If the result is not as specified, the multiplex network switch may have a malfunction.
| CHECK MULTIPLEX NETWORK SWITCH (REAR RH) |
Disconnect the N1 switch connector.
Measure the voltage and resistance according to the value(s) in the table below.
- Resistance:
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (N1-7) - Body ground W-B - Body ground Ground Always Below 1 Ω SEL1 (N1-9) - GND (N1-7) W-B - W-B Terminal for identification of rear RH switch Always Below 1 Ω
- Voltage:
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition BDR (N1-12) - GND (N1-7) O - W-B +B power supply Always 10 to 14 V
If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the N1 switch connector and reset the power window motor.
Measure the voltage according to the value(s) in the table below.
- Voltage:
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition UP (N1-6) - GND (N1-7) R - W-B Power window motor UP output Engine switch on (IG), rear RH power window switch OFF → UP (Manual operation) 0 V → 10 to 14 V UP (N1-6) - GND (N1-7) R - W-B Power window motor UP output Engine switch on (IG), rear RH power window fully open → rear RH power window switch UP (AUTO operation) → rear RH power window fully closed 0 V → 10 to 14 V → 0 V DN (N1-1) - GND (N1-7) G - W-B Power window motor DOWN output Engine switch on (IG), rear RH power window switch OFF → DOWN (Manual operation) 10 to 14 V → 0 V DN (N1-1) - GND (N1-7) G - W-B Power window motor DOWN output Engine switch on (IG), rear RH power window fully closed → rear RH power window switch DOWN (AUTO operation) → rear RH power window fully open 10 to 14 V → 0 V PCT1 (N1-11) - GND (N1-7) P - W-B Power window lock switch output Engine switch on (IG), Power window lock switch UNLOCK → LOCK 10 to 14 V → 0 V VCC (N1-5) - SGND (N1-8) W - LG Power window motor power source Engine switch on (IG), rear RH side power window switch OFF → UP or OFF → DOWN 0 V → 10 to 14 V
If the result is not as specified, the multiplex network switch may have a malfunction.
| CHECK MAIN BODY ECU RH (COWL SIDE J/B RH) |
Disconnect the RK connector.
Measure the voltage according to the value(s) in the table below.
- Voltage:
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition BECU (RK-5) - Body ground G-R - Body ground Power Supply Always 10 to 14 V
If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the RK connector.
Measure the resistance according to the value(s) in the table below.
- Resistance:
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition DCTY (P1-14) - Body ground W - Body ground Driver side courtesy switch input Driver side door CLOSED → OPEN 10 kΩ or higher → Below 1 Ω PCTY (J75-23) - Body ground B - W-B Front passenger side courtesy switch input Passenger side door CLOSED → OPEN 10 kΩ or higher → Below 1 Ω RCTY (P1-16) - Body ground O - W-B Rear RH side courtesy switch input Rear RH side door CLOSED → OPEN 10 kΩ or higher → Below 1 Ω LCTY (P1-16) - Body ground O - W-B Rear LH side courtesy switch input Rear LH side door CLOSED → OPEN 10 kΩ or higher → Below 1 Ω
If the result is not as specified, the main body ECU RH (cowl side J/B RH) may have a malfunction.