TERMINALS OF ECU
CHECK FOLD SEAT CONTROL ECU RH
(a) Disconnect the x3 and x4 fold seat control ECU RH connectors.
(b) Measure the resistance and voltage according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
x3-1 (ECUB) - Body ground | W - Body ground | Battery power supply | Always | 11 to 14 V |
x3-3 (IG) - Body ground | B - Body ground | IG power supply | Engine switch on (IG) | 11 to 14 V |
Engine switch off | Below 1 V | |||
x3-40 (IND2) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
x4-1 (IND1) - Body ground | B - Body ground | Battery power supply | Always | 11 to 14 V |
x4-2 (+B) - Body ground | W - Body ground | Battery power supply | Always | 11 to 14 V |
x4-9 (GND2) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
x4-10 (GND) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
(c) Reconnect the x3 and x4 fold seat control ECU RH connectors.
(d) Measure the resistance and voltage and check for pulses according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
x3-7 (RCLR) - Body ground | SB - Body ground | Rear power seat switch RH (return switch) signal | Rear power seat switch RH off → on (return) | 11 to 14 V → Below 1 V |
x3-8 (SG1) - Body ground | G - Body ground | Ground | Always | Below 1 Ω |
x3-10 (SFLD) - x3-8 (SG1) | P - G | Fold motor position sensor signal | Motor operating | Pulse generation |
x3-11 (SV1) - x3-8 (SG1) | R - G | Fold motor position sensor power supply | Engine switch off → on (IG) | Below 1 V → 5.5 to 8 V |
x3-12 (RCLF) - Body ground | G - Body ground | Rear power seat switch RH (fold switch) signal | Rear power seat switch RH off → on (fold) | 11 to 14 V → Below 1 V |
x3-17 (P) - Body ground | GR - Body ground | Driving condition signal |
| 11 to 14 V → Below 1 V |
Engine switch off | 11 to 14 V | |||
x3-18 (R CL) - Body ground | P - Body ground | Rear door courtesy light switch assembly RH signal | Rear door RH opened → closed | 11 to 14 V → Below 1 V |
x3-19 (BDCY) - Body ground | R - Body ground | Back door courtesy light switch assembly signal | Back door opened → closed | 11 to 14 V → Below 1 V |
x3-25 (RTRN) - Body ground | B - Body ground | Fold seat switch assembly (return switch) signal (for Rear Right Seat) | Fold seat switch assembly (for Rear Right Seat) off → on (return) | 11 to 14 V → Below 1 V |
x3-26 (FOLD) - Body ground | L - Body ground | Fold seat switch assembly (fold switch) signal (for Rear Right Seat) | Fold seat switch assembly (for Rear Right Seat) off → on (fold) | 11 to 14 V → Below 1 V |
x4-3 (RCL+) - Body ground | P - Body ground | Reclining motor operation signal | Rear power seat switch RH off → on (fold) | Below 1 V → 11 to 14 V |
x4-4 (FLD+) - Body ground | L - Body ground | Fold motor operation signal | Rear power seat switch RH or Fold seat switch assembly (for Rear Right Seat) off → on (fold) | Below 1 V → 11 to 14 V |
x4-7 (RCL-) - Body ground | LG - Body ground | Reclining motor operation signal | Rear power seat switch RH off → on (return) | Below 1 V → 11 to 14 V |
x4-8 (FLD-) - Body ground | SB - Body ground | Return motor operation signal | Rear power seat switch RH or Fold seat switch assembly (for Rear Right Seat) off → on (return) | Below 1 V → 11 to 14 V |
CHECK FOLD SEAT CONTROL ECU LH
(a) Disconnect the y3 and y4 fold seat control ECU LH connectors.
(b) Measure the resistance and voltage according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
y3-1 (ECUB) - Body ground | W - Body ground | Battery power supply | Engine switch on (IG) | 11 to 14 V |
y3-3 (IG) - Body ground | B - Body ground | IG power supply | Engine switch on (IG) | 11 to 14 V |
Engine switch off | Below 1 V | |||
y3-40 (IND2) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
y4-1 (IND1) - Body ground | B - Body ground | Battery power supply | Always | 11 to 14 V |
y4-2 (+B) - Body ground | W - Body ground | Battery power supply | Always | 11 to 14 V |
y4-9 (GND2) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
y4-10 (GND) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
(c) Reconnect the y3 and y4 fold seat control ECU LH connectors.
(d) Measure the resistance and voltage and check for pulses according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
y3-7 (RCLR) - Body ground | SB - Body ground | Rear power seat switch signal LH (return switch) signal | Rear power seat switch LH off → on (return) | 11 to 14 V → Below 1 V |
y3-8 (SG1) - Body ground | G - Body ground | Ground | Always | Below 1 Ω |
y3-10 (SFLD) - y3-8 (SG1) | P - G | Fold motor position sensor signal | Motor operating | Pulse generation |
y3-11 (SV1) - y3-8 (SG1) | R - G | Fold motor position sensor power supply | Engine switch off → on (IG) | Below 1 V → 5.5 to 8 V |
y3-12 (RCLF) - Body ground | G - Body ground | Rear power seat switch LH (fold switch) signal | Rear power seat switch LH off → on (fold) | 11 to 14 V → Below 1 V |
y3-17 (P) - Body ground | GR - Body ground | Driving condition signal |
| 11 to 14 V → Below 1 V |
Engine switch off | 11 to 14 V | |||
y3-18 (R CL) - Body ground | P - Body ground | Rear door courtesy light switch assembly LH signal | Rear door LH opened → closed | 11 to 14 V → Below 1 V |
y3-19 (BDCY) - Body ground | R - Body ground | Back door courtesy light switch assembly signal | Back door opened → closed | 11 to 14 V → Below 1 V |
y3-25 (RTRN) - Body ground | B - Body ground | Fold seat switch assembly (fold switch) signal (for Rear Left Seat) | Fold seat switch assembly (for Rear Left Seat) off → on (return) | 11 to 14 V → Below 1 V |
y3-26 (FOLD) - Body ground | L - Body ground | Fold seat switch assembly (fold switch) signal (for Rear Left Seat) | Fold seat switch assembly (for Rear Left Seat) off → on (fold) | 11 to 14 V → Below 1 V |
y4-3 (RCL+) - Body ground | P - Body ground | Reclining motor operation signal | Rear power seat switch LH off → on (fold) | Below 1 V → 11 to 14 V |
y4-4 (FLD+) - Body ground | L - Body ground | Fold motor operation signal | Rear power seat switch LH or Fold seat switch assembly (for Rear Left Seat) off → on (fold) | Below 1 V → 11 to 14 V |
y4-7 (RCL-) - Body ground | LG - Body ground | Reclining motor operation signal | Rear power seat switch LH off → on (return) | Below 1 V → 11 to 14 V |
y4-8 (FLD-) - Body ground | SB - Body ground | Return motor operation signal | Rear power seat switch LH or Fold seat switch assembly (for Rear Left Seat) off → on (return) | Below 1 V → 11 to 14 V |
Lexus RX (RX 350L, RX450h) 2016-2025 Owners Manual > Do-it-yourself
maintenance: Windshield wiper inserts
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1. Change the rest position of the windshield wipers to the service position
using
the wiper lever and then lift a windshield wiper.
2. While pressing and holding the
wiper blade lock release button,
remove the wiper blade.
When performing this operation ...
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