Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Compressor Solenoid Circuit (B1451/51)
DESCRIPTION
In this circuit, the cooler compressor assembly (compressor solenoid) receives a refrigerant compression demand signal from the air conditioning amplifier assembly.
Based on this signal, the cooler compressor assembly (compressor solenoid) changes the amount of compressor output.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory |
|---|---|---|---|---|
| B1451/51 | Compressor Solenoid Circuit | Open or short in compressor solenoid circuit |
| - |
WIRING DIAGRAM
PROCEDURE
| 1. | INSPECT COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID) |
| (a) Disconnect the D17 cooler compressor assembly (compressor solenoid) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 1 (SOL-) - 2 (SOL+) | 25°C (77°F) | 10.1 to 11.1 Ω |
| NG | .gif) | REPLACE COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID) |
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| 2. | CHECK HARNESS AND CONNECTOR (COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID) - BODY GROUND) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| D17-1 (SOL-) - Body ground | Always | Below 1 Ω |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. | CHECK HARNESS AND CONNECTOR (COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID) - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
(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 |
|---|---|---|
| D17-2 (SOL+) - J43-3 (SOL+) | Always | Below 1 Ω |
| D17-2 (SOL+) or J43-3 (SOL+) - Body ground | Always | 10 kΩ or higher |
| Result | Proceed to |
|---|---|
| NG | A |
| OK (When troubleshooting according to the Problem Symptoms Table) | B |
| OK (When troubleshooting according to the DTC) | C |
| A | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| B | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| C | | REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
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Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Rear Speed Sensor (for 2wd): Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
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Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Front Radar Sensor System: Front Radar Sensor Optical Axis Misalignment Malfunction (C1A1100)
DESCRIPTION The millimeter wave radar sensor assembly performs self-diagnosis to check for misalignment of its beam axis. If misalignment is detected, the millimeter wave radar sensor assembly stores DTC C1A1100. DTC No. Detection Item DTC Detection Condition Trouble Area C1A1100 Fron ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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