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.
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HINT:
Check the condition of each related circuit connector before troubleshooting.
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PROCEDURE
1. | CHECK FOR DTC (SFI SYSTEM) |
(a) Check if SFI system DTCs are output.
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Result | Proceed to |
---|---|
SFI system DTCs are not output | A |
SFI system DTCs are output | B |
A | ![]() | REPLACE 4WD ECU ASSEMBLY |
B | ![]() | GO TO SFI SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Headlight Assembly: Repair
REPAIR CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
If the installation area of the headlight assembly is damaged, use a supply retainer for a low-cost repair.
Ensure that the headlight assembly is not damaged. ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Navigation System: Telematics Transceiver Disconnected (B15DB)
DESCRIPTION If the radio receiver assembly cannot detect the DCM (telematics transceiver) for a certain period of time (90 seconds) after the engine switch is turned on (ACC) and the radio receiver assembly confirms that the information is missing by checking past DCM (telematics transceiver) recogn ...