DESCRIPTION
If the communication line (EFIO-IMI) to the transponder key ECU assembly is stuck high output (e.g. shorted to +B), the ECM stores this DTC.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
B279A |
Communication line (EFIO-IMI) between the ECM and transponder key ECU assembly is stuck high output. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CHECK DTC OUTPUT |
(a) Recheck for DTCs (See page ).
HINT:
If any DTCs other than DTC B279A are output, troubleshoot those DTCs first.
Result |
Proceed to |
---|---|
DTC B279A is output |
A |
DTC B279A and other DTCs are output |
B |
B |
GO TO DTC CHART |
|
2. |
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - ECM) |
(a) Disconnect the transponder key ECU assembly connector.
(b) Disconnect the ECM connector. |
|
(c) Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance:
for 2GR-FE
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D22-13 (EFIO) - A41-40 (IMI) |
Always |
Below 1 Ω |
D22-13 (EFIO) - Body ground |
Always |
10 kΩ or higher |
A41-40 (IMI) - Body ground |
Always |
10 kΩ or higher |
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D22-13 (EFIO) - A49-11 (IMI) |
Always |
Below 1 Ω |
D22-13 (EFIO) - Body ground |
Always |
10 kΩ or higher |
A49-11 (IMI) - Body ground |
Always |
10 kΩ or higher |
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D22-13 (EFIO) - Body ground |
Always |
Below 1 V |
*1 |
Front view of wire harness connector (to Transponder Key ECU Assembly) |
*2 |
Front view of wire harness connector (to ECM) |
*3 |
for 2GR-FE |
*4 |
for 1AR-FE |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
CHECK TRANSPONDER KEY ECU ASSEMBLY (OUTPUT) |
(a) Reconnect the transponder key ECU assembly connector.
(b) Reconnect the ECM connector.
(c) Using an oscilloscope, check the waveform. Waveform 1 (Reference):
Result:
|
|
B |
REPLACE ECM |
C |
REPLACE ECM |
|
4. |
REPLACE TRANSPONDER KEY ECU ASSEMBLY |
(a) Replace the transponder key ECU assembly (See page ).
|
5. |
REGISTER KEY |
(a) Register the key (See page ).
|
6. |
REGISTER ECU COMMUNICATION ID |
(a) Register the ECU communication ID (See page ).
|
7. |
CHECK DTC OUTPUT |
(a) Clear the DTCs (See page ).
(b) Recheck for DTCs (See page ).
OK:
DTC B279A is not output.
Result |
Proceed to |
---|---|
OK |
A |
NG (for 2GR-FE) |
B |
NG (for 1AR-FE) |
C |
A |
END (TRANSPONDER KEY ECU WAS DEFECTIVE) |
B |
REPLACE ECM |
C |
REPLACE ECM |
Removal
REMOVAL
PROCEDURE
1. REMOVE PARKING BRAKE PEDAL ASSEMBLY
HINT:
Refer to the instructions for Removal of the parking brake pedal assembly (See
page ).
2. REMOVE NO. 1 PARKING BRAKE CABLE ASSEMBLY
(a) Remove the clip.
...
Customize Parameters
CUSTOMIZE PARAMETERS
1. CUSTOMIZE METER / GAUGE SYSTEM
(a) Customizing with the Techstream
(1) Connect the Techstream to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn the Techstream on.
(4) Enter the following menus: Customize Setting / Warning. ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL SEPARATE TYPE FRONT SEAT CUSHION COVER
(a) Using a tacker, install the separate type front seat cushion heater
to the end of the separate type front seat cushion cover with 25 new tack
pins.
NOTICE:
...