Lexus RX (RX 350L, RX450h) 2016-2023 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) 2016-2023 Repair Manual > Oil Pan And Oil Level Sensor: Inspection
INSPECTION PROCEDURE 1. INSPECT ENGINE OIL LEVEL SENSOR (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 1 - Body ground ON Below 1 Ω OFF 10 kΩ or higher If the result is not as ...
Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Lighting System (w/ Automatic Headlight Beam Level Control System): Parts Location
PARTS LOCATION ILLUSTRATION *A w/ Automatic High Beam System *B w/ Front Fog Light *1 HEADLIGHT ASSEMBLY LH - NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH - HEADLIGHT UNIT LH *2 HEADLIGHT ASSEMBLY RH - NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH - HEADLIGHT UNIT RH *3 FOG LIGHT ASSEMBLY LH ...
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
- General
- Audio & Visual & Telematics
- Brake
- Drivetrain
- Engine & Hybrid System
- Power Source & Network
- Steering
- Suspension
- Vehicle Exterior
- Vehicle Interior
Chevrolet Trax (2013-2022) Owner's Manual
0.0156