DESCRIPTION
This DTC is output by the 4WD ECU assembly if a malfunction occurs in the linear solenoid power supply system.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
C120C | Linear Solenoid Power Supply System Malfunction |
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
HINT:
Check the condition of each related circuit connector before troubleshooting.
Click here
PROCEDURE
1. | CHECK HARNESS AND CONNECTOR (IG1 TERMINAL) |
(a) Disconnect the R10 4WD ECU assembly connector.
(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Switch Condition | Specified Condition |
---|---|---|
R10-3 (IG1) -Body ground | Engine switch on (IG) | 11 to 14 V |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
2. | CHECK HARNESS AND CONNECTOR (GND TERMINAL) |
(a) Turn the engine switch off.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
R10-4 (GND) -Body ground | Always | Below 1 Ω |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. | RECONFIRM DTC |
(a) Connect the R10 4WD ECU assembly connector.
(b) Clear the DTCs.
Click here
(c) Turn the engine switch off.
(d) Turn the engine switch on (IG).
(e) Check that no DTCs other than DTC C120C are output.
Click here
Result | Proceed to |
---|---|
DTCs other than C120C are not output | A |
DTCs other than C120C are output | B |
A | ![]() | REPLACE 4WD ECU ASSEMBLY |
B | ![]() | REPAIR CIRCUIT INDICATED BY OUTPUT CODE |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lighting (ext): Front Turn Signal Light Bulb
ReplacementREPLACEMENT CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. REMOVE COOL AIR INTAKE DUCT SEAL Click here 2. REMOVE FRONT TURN SIGNAL LIGHT BULB (a) for RH Side: (1) Remove the bolt. (2) Dis ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Door Courtesy Light: Installation
INSTALLATION PROCEDURE 1. INSTALL COURTESY LIGHT BULB (for Bulb Type) (a) Install the courtesy light bulb to the courtesy light housing as shown in the illustration. Install in this Direction (b) Install the courtesy light cover to the courtesy light housing as shown in the illustration. ...