RM35X0E _58 Vehicle Interior _078378 THEFT DETERRENT / KEYLESS ENTRY _0386642 IMMOBILISER SYSTEM C

THEFT DETERRENT / KEYLESS ENTRY  IMMOBILISER SYSTEM  B2780  Push Switch / Key Unlock Warning Switch Malfunction  


DESCRIPTION

This DTC is stored if the transponder key ECU assembly does not detect that the unlock warning switch assembly is on even when the ignition switch is ON.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2780 Push Switch / Key Unlock Warning Switch Malfunction The unlock warning switch assembly is not detected as being on when the ignition switch is ON (1 trip detection logic*).
·

Wire harness or connector

·

Unlock warning switch assembly

·

Transponder key ECU assembly


DTC Output Confirmation Operation:

Insert the door control transmitter assembly into the ignition key cylinder.



*: Only output while a malfunction is present.


Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Operation when Malfunction Detected
Engine cannot be started -

Related Data List and Active Test
DTC No. Data List and Active Test
B2780 Key SW

WIRING DIAGRAM

E318141E32
5.615,0.75 6.073,0.948 0.458,0.198 10 false KSW 5.375,0.75 5.833,0.948 0.458,0.198 10 false 5 5.656,1.844 6.75,2.302 1.094,0.458 10 false Transponder Key ECU Assembly 5.667,1.688 6.125,1.885 0.458,0.198 10 false N66 2.667,1.24 3.125,1.438 0.458,0.198 10 false N29 2.677,1.396 5.104,1.708 2.427,0.313 10 false Unlock Warning Switch Assembly 2.833,0.771 3.292,0.969 0.458,0.198 10 false 2 4.365,0.76 4.823,0.958 0.458,0.198 10 false 1 6.313,0.365 6.771,0.563 0.458,0.198 10 false +B 3.01,0.75 3.344,0.927 0.333,0.177 10 false UN- 3.938,0.75 4.271,0.927 0.333,0.177 10 false UN+

CAUTION / NOTICE / HINT

NOTICE:
·

Before replacing the transponder key ECU assembly, refer to the Service Bulletin.

·

After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".



PROCEDURE

1.INSPECT UNLOCK WARNING SWITCH ASSEMBLY
a.

Remove the unlock warning switch assembly.

Click hereVehicle Interior>DOOR LOCK>UNLOCK WARNING SWITCH>REMOVAL


b.

Inspect the unlock warning switch assembly.

Click hereVehicle Interior>DOOR LOCK>UNLOCK WARNING SWITCH>INSPECTION


Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - TRANSPONDER KEY ECU ASSEMBLY AND BODY GROUND)

NG

REPLACE UNLOCK WARNING SWITCH ASSEMBLY

Click hereVehicle Interior>DOOR LOCK>UNLOCK WARNING SWITCH>REMOVAL


2.CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - TRANSPONDER KEY ECU ASSEMBLY AND BODY GROUND)
a.

Disconnect the N66 transponder key ECU assembly connector.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N29-1 (UN+) - N66-5 (KSW) Always Below 1 Ω
N29-2 (UN-) - Body ground Always Below 1 Ω
N29-1 (UN+) or N66-5 (KSW) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE TRANSPONDER KEY ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR