Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: 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 engine switch is off. This power is used for diagnostic trouble code memory, 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 - POWER SOURCE) |
(a) Disconnect the J43 air conditioning amplifier assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J43-1 (B) - Body ground | Always | 11 to 14 V |
| NG | .gif) | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
.gif)
| 2. | CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - BODY GROUND) |
(a) Disconnect the J43 air conditioning amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J43-4 (GND) - Body ground | Always | Below 1 Ω |
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
.gif)
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
Rear Blower Motor Circuit
DESCRIPTION The rear blower motor with fan sub-assembly is operated by signals from the air conditioning amplifier assembly. Rear blower motor speed signals are transmitted in accordance with changes ...
ECO Switch Circuit
DESCRIPTION When the combination switch assembly (ECO mode switch) is turned on, the air conditioning amplifier assembly receives a combination switch assembly (ECO mode switch) ON signal and controls ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Electric Parking Brake System: Right Electric Parking Brake Actuator Control Circuit Open (C061013)
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note C061013 Right Electric Parking Brake Actuator Control Circuit Open
Diagnosis Condition:
Electric parking brake not operating
Malfunction Status:
The ECU power supply is normal but there is a ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Shift Paddle Switch: Installation
INSTALLATION PROCEDURE 1. INSTALL NO. 1 SWITCH WIRE HINT: Perform this procedure only when replacement of the No. 1 switch wire is necessary. (a) Engage the 6 clamps to install the No. 1 switch wire to the steering wheel assembly. (b) Engage the 2 guides. (c) Connect the steering vibration and heate ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
0.015