Lexus NX: IG Power Source Circuit
DESCRIPTION
When the power switch is turned on (IG), the IG power source circuit supplies positive (+) voltage to the multiplex tilt and telescopic ECU.
The multiplex tilt and telescopic ECU also receives power switch signals via this circuit.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
| 1. | CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - AUXILIARY BATTERY) |
| (a) Disconnect the I60 multiplex tilt and telescopic ECU connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I60-10 (IG) - Body ground | Power switch on (IG) | 11 to 14 V |
| NG | .gif) | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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| 2. | CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BODY GROUND) |
| (a) Disconnect the I60 multiplex tilt and telescopic ECU connector. |
|
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(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I60-1 (GND) - Body ground | Always | Below 1 Ω |
| I60-8 (GND2) - Body ground | Always | Below 1 Ω |
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Components
COMPONENTS ILLUSTRATION *1 COLUMN HOLE COVER SILENCER SHEET *2 COMBINATION SWITCH ASSEMBLY WITH SPIRAL CABLE SUB-ASSEMBLY *3 ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY *4 LOWER ST
Removal
REMOVAL CAUTION / NOTICE / HINT NOTICE:
Do not replace the spiral with sensor cable sub-assembly with the battery connected and the engine switch on (IG).
Do not rotate the spiral with sensor cab
SEE MORE:
Installation
INSTALLATION PROCEDURE 1. INSTALL AIR CONDITIONING THERMISTOR ASSEMBLY (HUMIDITY SENSOR) *1 Stopper *2 Bracket (a) Attach the 2 brackets, and carefully install the air conditioning thermistor assembly (humidity sensor) to the glass surface, preventing air bubbles from forming between
On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. CHECK STEERING EFFORT (TORQUE) CAUTION: These service operations may affect the SRS airbags. Be sure to read the precautionary notices concerning the SRS airbag system before servicing. Click here (a) Stop the vehicle on a level, paved surface and align the whee
