Lexus NX: Folding Motor Circuit
DESCRIPTION
The fold seat control ECU receives switch operation signals from the No. 1 and No. 2 fold seat switches and activates the power seat motors. At this time, the Hall IC detects the actuation of the seat cushion and sends a seat cushion actuation signal to the fold seat control ECU. The fold seat control ECU uses signals from the Hall IC to detect if an object is caught or if any other abnormal condition has occurred.
WIRING DIAGRAM
PROCEDURE
| 1. | INSPECT REAR SEATBACK FRAME SUB-ASSEMBLY (FOLD MOTOR) |
(a) Remove the rear seatback frame sub-assembly.
Click here .gif)
(b) Inspect the rear seatback frame sub-assembly.
Click here
| NG | .gif) | REPLACE REAR SEATBACK FRAME SUB-ASSEMBLY |
|
.gif)
| 2. | CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - REAR SEATBACK FRAME SUB-ASSEMBLY) |
(a) Rear Right Seat:
(1) Disconnect the h3 and h4 fold seat control ECU (rear right seat) connectors.
(2) Disconnect the h2 rear seatback frame sub-assembly RH connector.
(b) Rear Left Seat:
(1) Disconnect the i3 and i4 fold seat control ECU (rear left seat) connectors.
(2) Disconnect the i1 rear seatback frame sub-assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Rear Right Seat
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| h3-11 (SV1) - h2-5 (HLV) | Always | Below 1 Ω |
| h3-11 (SV1) or h2-5 (HLV) - Body ground | Always | 10 kΩ or higher |
| h3-10 (SFLD) - h2-2 (HLS) | Always | Below 1 Ω |
| h3-10 (SFLD) or h2-2 (HLS) - Body ground | Always | 10 kΩ or higher |
| h3-8 (SG1) - h2-6 (HLG) | Always | Below 1 Ω |
| h3-8 (SG1) or h2-6 (HLG) - Body ground | Always | 10 kΩ or higher |
| h4-4 (FLD+) - h2-3 (FWD) | Always | Below 1 Ω |
| h4-4 (FLD+) or h2-3 (FWD) - Body ground | Always | 10 kΩ or higher |
| h4-8 (FLD-) - h2-4 (BACK) | Always | Below 1 Ω |
| h4-8 (FLD-) or h2-4 (BACK) - Body ground | Always | 10 kΩ or higher |
Rear Left Seat
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| i3-11 (SV1) - i1-5 (HLV) | Always | Below 1 Ω |
| i3-11 (SV1) or i1-5 (HLV) - Body ground | Always | 10 kΩ or higher |
| i3-10 (SFLD) - i2-2 (HLS) | Always | Below 1 Ω |
| i3-10 (SFLD) or i2-2 (HLS) - Body ground | Always | 10 kΩ or higher |
| i3-8 (SG1) - i1-6 (HLG) | Always | Below 1 Ω |
| i3-8 (SG1) or i1-6 (HLG) - Body ground | Always | 10 kΩ or higher |
| i4-4 (FLD+) - i1-3 (FWD) | Always | Below 1 Ω |
| i4-4 (FLD+) or i1-3 (FWD) - Body ground | Always | 10 kΩ or higher |
| i4-8 (FLD-) - i1-4 (BACK) | Always | Below 1 Ω |
| i4-8 (FLD-) or i1-4 (BACK) - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. | CHECK REAR SEATBACK FRAME SUB-ASSEMBLY (SENSOR) |
(a) Temporarily replace the rear seatback frame sub-assembly with a new or known good one.
Click here
(b) Check the rear power seat system.
| OK | | END (REAR SEATBACK FRAME SUB-ASSEMBLY WAS DEFECTIVE) |
| NG | | REPLACE FOLD SEAT CONTROL ECU |
READ NEXT:
Reclining Motor Circuit
DESCRIPTION The fold seat control ECU receives switch operation signals from the No. 1 and No. 2 fold seat switches and rear power seat switch and activates the power seat motors. At this time, the Ha
Rear Power Seat Switch Circuit
DESCRIPTION When the rear power seat switch is operated, a recline signal is sent to the fold seat control ECU. The ECU activates the power seat motor based on the signal from the rear power seat swit
SEE MORE:
Telescopic Position Sensor or Telescopic Motor Circuit Malfunction (B2611)
DESCRIPTION The telescopic motor is operated by the power source voltage supplied from the multiplex tilt and telescopic ECU and slides the steering column forward and backward. The telescopic position sensor (Hall IC) in the telescopic motor detects the sliding position of the steering column in th
Generator Inverter Performance (P0A7A-325,P0A7A-810)
DTC SUMMARY MALFUNCTION DESCRIPTION These DTCs indicate that a large current flowed in the inverter for the generator. The cause of this malfunction may be one of the following: Internal inverter malfunction
Internal circuit malfunction in the inverter for the generator
Malfunction in the senso
