DTC Code | DTC Name |
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B279A | Theft Deterrent System Communication Line High Fixation |
DESCRIPTION
When the communication line (IMI - EFIO) between the ECM and ID code box (immobiliser code ECU) is stuck high, the ECM stores this DTC.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
---|---|---|---|---|
B279A | Theft Deterrent System Communication Line High Fixation | The communication line (IMI - EFIO) between the ECM and ID code box (immobiliser code ECU) is stuck high (1 trip detection logic*1). |
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DTC output confirmation operation:
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*1: Only output while a malfunction is present.
Vehicle Condition when Malfunction Detected | Fail-safe Operation when Malfunction Detected |
---|---|
Engine cannot be started (initial ignition occurs and engine cranks, then ignition stops) | Engine cannot be started |
DTC No. | Data List and Active Test |
---|---|
B279A | - |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
When replacing the ID code box (immobiliser code ECU) refer to Service Bulletin.
After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation."
Tech Tips
When DTC B279A and a certification ECU (smart key ECU assembly) DTC are output simultaneously, first perform troubleshooting for the certification ECU (smart key ECU assembly) DTC.
PROCEDURE
CLEAR DTC
Clear the DTCs.
Result | ||
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NEXT |
CHECK FOR DTC
Turn the engine switch on (IG) and wait 10 seconds.
Check for DTCs.
Tech Tips
If DTCs other than DTC B279A are output, troubleshoot those DTCs first.
Result | ||||||
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B |
GO TO DIAGNOSTIC TROUBLE CODE CHART Click here |
A |
CHECK CONNECTION OF CONNECTOR
Turn the engine switch off.
Check that the connectors are properly connected to the ECM and ID code box (immobiliser code ECU).
OK |
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Connectors are properly connected. |
Result | |||
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NG |
CONNECT CONNECTORS PROPERLY |
OK |
CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - ECM)
Disconnect the E87 ID code box (immobiliser code ECU) connector.
Disconnect the A50*1, A118*2 or A101*3 ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||
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Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
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*1: for 1ZR-FE, 2ZR-FE, 1ZR-FAE or 1NR-FE
*2: for 1AD-FTV
*3: for 1ND-TV
Result | |||
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NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
REPLACE ID CODE BOX (IMMOBILISER CODE ECU)
Replace the ID code box (immobiliser code ECU) with a new one.
Tech Tips
Refer to Service Bulletin.
Result | ||
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NEXT |
REGISTER RECOGNITION CODES
Register the recognition codes in the ECUs.
Tech Tips
Refer to Service Bulletin.
Result | ||
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NEXT |
REGISTER ECU COMMUNICATION ID
Register the ECU communication ID.
Tech Tips
Refer to Service Bulletin.
Result | ||
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NEXT |
CLEAR DTC
Clear the DTCs.
Result | ||
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NEXT |
CHECK FOR DTC
Check for DTCs.
Tech Tips
Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
OK |
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DTC B279A is not output. |
Result | ||||||||||||||||
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|
A |
END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE) |
B |
REPLACE ECM Click here |
C |
REPLACE ECM Click here |
D |
REPLACE ECM Click here |
E |
REPLACE ECM Click here |
F |
REPLACE ECM Click here |
G |
REPLACE ECM Click here |