Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Air Conditioning Control Panel Circuit
DESCRIPTION
The radio receiver assembly (A/C control panel) switch signals are sent to the air conditioning amplifier assembly via CAN communication.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
| 1. | CHECK CAN COMMUNICATION SYSTEM |
(a) Using the Techstream, check if the CAN communication system is functioning normally.
Click here .gif)
| Result | Proceed to |
|---|---|
| CAN communication system DTCs are not output | A |
| CAN communication system DTCs are output | B |
| B | .gif) | GO TO CAN COMMUNICATION SYSTEM |
|
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| 2. | CHECK AVC-LAN COMMUNICATION CIRCUIT |
(a) Check for an open or short in all AVC-LAN communication circuits.
w/ Navigation System: Click here
w/ Audio and Visual System (for 12.3 Inch Display): Click here
w/ Audio and Visual System (for 8 Inch Display): Click here
OK:
There is no open or short circuit.
| NG | | REPAIR AVC-LAN COMMUNICATION CIRCUIT |
|
| 3. | CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY (A/C CONTROL PANEL) - POWER SOURCE AND BODY GROUND) |
(a) Disconnect the J148 and J149 radio receiver assembly (A/C control panel) connectors.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J149-19 (IG) - Body ground | Engine switch on (IG) | 11 to 14 V |
| J148-15 (ACC1) - Body ground | Engine switch on (ACC) | 11 to 14 V |
| J148-4 (+B1) - Body ground | Always | 11 to 14 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J148-1 (GND1) - Body ground | Always | Below 1 Ω |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. | CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY ASSEMBLY - POWER SOURCE AND BODY GROUND) |
(a) Disconnect the J56 multi-display assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J56-24 (ACC) - Body ground | Engine switch on (ACC) | 11 to 14 V |
| J56-12 (B) - Body ground | Always | 11 to 14 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J56-13 (GND1) - Body ground | Always | Below 1 Ω |
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
Lost Communication with ECM (U0100-U0142,U0151,U0155,U0163)
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area Memory U0100 Lost Communication with ECM No communication with ECM
CAN communication system
ECM
M ...
Blower Motor Circuit
DESCRIPTION The blower motor with fan sub-assembly is operated by signals from the air conditioning amplifier assembly. Blower motor speed signals are transmitted in accordance with changes in the dut ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2024 Owners Manual > Before driving: Vehicle load limits
Vehicle load limits include total load capacity, seating capacity,
trailer weight
rating and cargo capacity.
Total load capacity (vehicle capacity weight)
Total load capacity means the combined weight of occupants, cargo and
luggage.
Seating capacity
RX450h
5 occupants (Front 2, Rear 3)
R ...
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Engine Assembly: Installation
INSTALLATION CAUTION / NOTICE / HINT CAUTION:
The engine assembly with transaxle is very heavy. Be sure to follow the procedure described in the repair manual, or the engine lifter may suddenly drop or the engine assembly with transaxle may fall off the engine lifter.
To prevent burns, do not t ...
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
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