Lexus NX: IG Power Source Circuit
DESCRIPTION
The main power source is supplied to the air conditioning amplifier assembly when the power switch is on (IG).
The power is used for operating the air conditioning amplifier assembly, servo motors, etc.
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 (AIR CONDITIONING AMPLIFIER ASSEMBLY - BATTERY AND BODY GROUND) |
| (a) Disconnect the air conditioning amplifier assembly connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
| I50-1 (IG+) - Body ground | Power switch off | Below 1 V |
| I50-1 (IG+) - Body ground | Power switch on (IG) | 11 to 14 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I50-14 (GND) - Body ground | Always | Below 1 Ω |
| OK | .gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
.gif)
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Back-up Power Source Circuit
DESCRIPTION The back-up power source circuit for the air conditioning amplifier assembly is shown below. Power is supplied even when the power switch is off. The power is used for diagnostic trouble c
Removal
REMOVAL PROCEDURE 1. RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM Click here 2. DRAIN ENGINE COOLANT Click here 3. DISCONNECT AIR CONDITIONER TUBE AND ACCESSORY ASSEMBLY (a) Remove the bolt an
SEE MORE:
Speaker Circuit (B1360)
DESCRIPTION This DTC is stored when a connection malfunction, such as an open, is detected in the wire harness between the stereo component equalizer assembly and No. 1 speaker assembly with box. DTC No. Detection Item DTC Detection Condition Trouble Area B1360 Speaker Circuit Open
Brake System (P1578)
DESCRIPTION When a malfunction in the electronically controlled brake system is detected, DTC P1578 is stored. DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from P1578 Brake System When the power switch is on (IG) and the dynamic radar cruise control syste
