Lexus NX: Front Power Seat does not Operate with Front Power Seat Switch
DESCRIPTION
Signals are input into the front power seat switch LH. The built-in ECU manages the signals received from the power seat switch, and operates each motor. If the front power seat switch LH receives more than 2 motor operation signals, the motor is stopped. Manual operation is restarted after the front power seat switch LH receives 1 signal only.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
| 1. | CHECK FRONT POWER SEAT OPERATION |
(a) Check that each function of the power seat operates normally by using the front power seat switch LH.
Click here .gif)
| Result | Proceed to |
|---|---|
| All power seat functions do not operate | A |
| One or more power seat functions do not operate | B |
| B | .gif) | GO TO OTHER DIAGNOSIS PROCEDURE (One or more Power Seat Motors do not Operate) |
|
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| 2. | CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - BATTERY AND BODY GROUND) |
| (a) Disconnect the g11 and g12 front power seat switch LH connectors. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| g11-2 (GND) - Body ground | Always | Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
| g11-7 (+B) - Body ground | Power switch off | 11 to 14 V |
| g12-3 (IG) - Body ground | Power switch on (IG) | 11 to 14 V |
| Power switch off | Below 1 V | |
| g12-12 (SYSB) - Body ground | Power switch off | 11 to 14 V |
| OK | | REPLACE FRONT POWER SEAT SWITCH LH |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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