DTC B2799 Engine Immobiliser System Malfunction |
for Preparation Click here
DESCRIPTION
This DTC is output when one of the following occurs: 1) the ECM detects errors in its own communications with the transponder key ECU assembly; 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the transponder key ECU assembly and ECM is different and an engine start is attempted. Before troubleshooting for this DTC, make sure no transponder key ECU DTCs are present. If present, troubleshoot the transponder key ECU DTCs first.DTC Code | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
B2799 | Either condition is met (1 trip detection logic*1):
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| Either condition is met:
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- *1: Only output while a malfunction is present.
- *2: for Automatic Transmission
- *3: for Manual Transmission
Vehicle Condition when Malfunction Detected | Fail-safe Operation when Malfunction Detected |
Engine cannot be started. | - |
DTC Code | Data List and Active Test |
B2799 | - |
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- The fixed 12 V power source voltage in the ECM is output through a resistance from terminal IMI. The transponder key ECU assembly grounds or does not ground this power source voltage accordingly.
- The fixed 12 V power source voltage in the transponder key ECU assembly is output through a resistance from terminal EFII. The ECM grounds or does not ground this power source voltage accordingly.
- When replacing the transponder key ECU assembly or ECM, refer to the Service Bulletin.
- After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
- HINT:
- After troubleshooting for this DTC, make sure B2799 is not present. If present, troubleshoot the blocking system DTCs next.
1.CLEAR DTC |
Clear the DTCs (Click here).
NEXT | |
2.CHECK FOR DTC |
Check for the DTCs (Click here).
- OK:
- DTC B2799 is not output.
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OK | ||
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3.REREGISTER ECU COMMUNICATION ID |
Reregister the ECU - ECM communication ID (Refer to Service Bulletin).
NEXT | |
4.CLEAR DTC |
Clear the DTCs (Click here).
NEXT | |
5.CHECK FOR DTC |
Check for the DTCs (Click here).
- OK:
- DTC B2799 is not output.
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OK | ||
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6.CHECK CONNECTION OF CONNECTOR |
Turn the ignition switch off.
Check that the connectors are properly connected to the ECM and transponder key ECU assembly.
- OK:
- Connectors are properly connected.
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OK | |
7.CHECK HARNESS AND CONNECTOR (SFI OR ECD COMMUNICATION LINE) |
Disconnect the T21 transponder key ECU assembly connector.
Disconnect the E6*1, E10*2, E13*3 or E30*4 ECM connector.
- *1: for 1KD-FTV, 2KD-FTV (except DPF)
- *2: for 1TR-FE, 2TR-FE
- *3: for 1GR-FE
- *4: for 1KD-FTV, 2KD-FTV (for DPF)
- *1: for 1KD-FTV, 2KD-FTV (except DPF)
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
- for 1KD-FTV, 2KD-FTV (except DPF):
Tester Connection Condition Specified Condition T21-13 (EFIO) - E6-30 (IMI) Always Below 1 Ω T21-12 (EFII) - E6-29 (IMO) Always Below 1 Ω T21-13 (EFIO) or E6-30 (IMI) - Body ground Always 10 kΩ or higher T21-12 (EFII) or E6-29 (IMO) - Body ground Always 10 kΩ or higher - for 1TR-FE, 2TR-FE:
Tester Connection Condition Specified Condition T21-13 (EFIO) - E10-16 (IMI) Always Below 1 Ω T21-12 (EFII) - E10-15 (IMO) Always Below 1 Ω T21-13 (EFIO) or E10-16 (IMI) - Body ground Always 10 kΩ or higher T21-12 (EFII) or E10-15 (IMO) - Body ground Always 10 kΩ or higher - for 1GR-FE:
Tester Connection Condition Specified Condition T21-13 (EFIO) - E13-16 (IMI) Always Below 1 Ω T21-12 (EFII) - E13-15 (IMO) Always Below 1 Ω T21-13 (EFIO) or E13-16 (IMI) - Body ground Always 10 kΩ or higher T21-12 (EFII) or E13-15 (IMO) - Body ground Always 10 kΩ or higher - for 1KD-FTV, 2KD-FTV (for DPF):
Tester Connection Condition Specified Condition T21-13 (EFIO) - E30-28 (IMI) Always Below 1 Ω T21-12 (EFII) - E30-29 (IMO) Always Below 1 Ω T21-13 (EFIO) or E30-28 (IMI) - Body ground Always 10 kΩ or higher T21-12 (EFII) or E30-29 (IMO) - Body ground Always 10 kΩ or higher
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
- for 1KD-FTV, 2KD-FTV (except DPF):
Tester Connection Condition Specified Condition T21-13 (EFIO) or E6-30 (IMI) - Body ground Always Below 1 V T21-12 (EFII) or E6-29 (IMO) - Body ground Always Below 1 V - for 1TR-FE, 2TR-FE:
Tester Connection Condition Specified Condition T21-13 (EFIO) or E10-16 (IMI) - Body ground Always Below 1 V T21-12 (EFII) or E10-15 (IMO) - Body ground Always Below 1 V - for 1GR-FE:
Tester Connection Condition Specified Condition T21-13 (EFIO) or E13-16 (IMI) - Body ground Always Below 1 V T21-12 (EFII) or E13-15 (IMO) - Body ground Always Below 1 V - for 1KD-FTV, 2KD-FTV (for DPF):
Tester Connection Condition Specified Condition T21-13 (EFIO) or E30-28 (IMI) - Body ground Always Below 1 V T21-12 (EFII) or E30-29 (IMO) - Body ground Always Below 1 V
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OK | |
8.REPLACE ECM |
Temporarily replace the ECM with a new one.
- for 1KD-FTV (except DPF): Click here
- for 1KD-FTV (for DPF): Click here
- for 2KD-FTV (except DPF): Click here
- for 2KD-FTV (for DPF): Click here
- for 1TR-FE: Click here
- for 2TR-FE: Click here
- for 1GR-FE: Click here
- for 1KD-FTV (except DPF): Click here
NEXT | |
9.REREGISTER ECU COMMUNICATION ID |
Reregister the ECU - ECM communication ID (Refer to Service Bulletin).
NEXT | |
10.CLEAR DTC |
Clear the DTCs (Click here).
NEXT | |
11.CHECK FOR DTC |
Check for the DTCs (Click here).
- OK:
- DTC B2799 is not output.
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OK | ||
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