Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Engine Circuit Malfunction (C1280)
DESCRIPTION
If a malfunction in the ECM circuit is detected, the 4WD ECU assembly stores this DTC.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1280 | Engine Circuit Malfunction | When the following continues for 5 seconds or more:
|
|
CAUTION / NOTICE / HINT
NOTICE:
When the 4WD ECU assembly is replaced with a known good one from another vehicle, it is necessary to perform calibration.
Click here .gif)
HINT:
Check the condition of each related circuit connector before troubleshooting.
Click here
PROCEDURE
| 1. | CHECK FOR DTC (SFI SYSTEM) |
(a) Check if SFI system DTCs are output.
Click here
| Result | Proceed to |
|---|---|
| SFI system DTCs are not output | A |
| SFI system DTCs are output | B |
| A | .gif) | REPLACE 4WD ECU ASSEMBLY |
| B | | GO TO SFI SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) |
Low or High Power Supply Voltage (C1241)
DESCRIPTION If a malfunction in the power source circuit occurs, or a communication malfunction with the skid control ECU (brake actuator assembly) or speed sensor occurs, the 4WD ECU assembly prohibi ...
ABS Malfunction (C1296)
DESCRIPTION If a malfunction in the speed sensor signal circuit or acceleration sensor (airbag sensor assembly*1 or yaw rate sensor assembly*2) circuit is detected, the 4WD ECU assembly stores this DT ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Electric Parking Brake Actuator: Inspection
INSPECTION PROCEDURE 1. INSPECT PARKING BRAKE ACTUATOR ASSEMBLY (a) Parking brake actuator assembly operation inspection (1) Apply voltage to the terminals of the parking brake actuator assembly and check that it operates as specified. OK: LH Battery Connection Parking Brake Actuator Assemb ...
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Heated Steering Wheel System: System Description
SYSTEM DESCRIPTION HEATED STEERING WHEEL SYSTEM (a) The heated steering wheel system heats the steering wheel assembly when the steering heater switch (Integration control and panel assembly) is operated. (b) The heated steering wheel system uses a thermistor inside of the steering wheel assembly to ...
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
0.0547