Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Engine Immobiliser System Incorrect Assembly (B279C95)
DESCRIPTION
If an ECM that is incompatible with the immobiliser system is installed, the ECM will store this DTC.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| B279C95 | Engine Immobiliser System Incorrect Assembly | An ECM that is incompatible with the immobiliser system is installed. (1-trip detection logic*) | ECM | - |
- *: Only detected while a malfunction is present.
| Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
|---|---|
| Engine cannot be started | - |
| DTC No. | Data List and Active Test |
|---|---|
| B279C95 | - |
CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
-
Before replacing the ECM, refer to Registration.
Click here
.gif)
- After performing repairs, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
| 1. | REPLACE ECM |
(a) Temporarily replace the ECM with a new one.
Click here
|
| 2. | CLEAR DTC |
(a) Clear the DTCs.
Powertrain > Engine > Clear DTCs
|
| 3. | CHECK FOR DTC |
(a) Check for DTCs.
Powertrain > Engine > Trouble CodesOK:
B279C95 is not output.
| Result | Proceed to |
|---|---|
| DTC B279C95 is not output | A |
| DTC B279C95 is output | B |
| A | .gif) | END (ECM WAS DEFECTIVE) |
| B | | USE SIMULATION METHOD TO CHECK |
Engine Immobiliser System Circuit Short to Battery (B279A12)
DESCRIPTION If the communication line (IMI - EFIO) between the ECM and ID code box (immobiliser code ECU) is stuck high, the ECM will store this DTC. DTC No. Detection Item DTC Detection Condit ...
Security Indicator Light Does not Blink
DESCRIPTION
The certification ECU (smart key ECU assembly) blinks the security indicator light (radio receiver assembly) when the immobiliser is set (engine switch off).
The certification ECU (sm ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Audio And Visual System (for 12.3 Inch Display): Main Body ECU Vehicle Information Reading/Writing Process Malfunction (B15F6)
DESCRIPTION This DTC is stored when items controlled by the main body ECU (multiplex network body ECU) cannot be customized via the audio and visual system vehicle customization screen. HINT: The main body ECU (multiplex network body ECU) controls the items for the following systems that are customi ...
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Automatic Transaxle System: Shift Solenoid "A" Circuit Short to Battery or Open (P075015)
DESCRIPTION Changing gears is performed by the ECM turning the shift solenoid valves SL1, SL2, SL3, SL4, SL5, S1 and S2 on and off. If an open or short occurs in any of the shift solenoid valve circuits, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be driven. I ...
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
0.0205