Dtc B2780 Push Switch / Key Unlock Warning Switch Malfunction

Vehicle Interior. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
Theft Deterrent Keyless Entry. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CLEAR DTC

CHECK FOR DTC

INSPECT UNLOCK WARNING SWITCH ASSEMBLY

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

DTC 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. Under normal conditions, the unlock warning switch assembly is on when the ignition switch is ON.

DTC Code
DTC Detection Condition
Trouble Area
DTC Output Confirmation Operation
B2780
The unlock warning switch assembly is not detected as being on when the ignition switch is ON (1 trip detection logic*).
  1. Unlock warning switch assembly
  2. Harness or connector
  3. Transponder key ECU assembly
Insert the key into the ignition key cylinder.
  1. *: 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 Code
Data List and Active Test
B2780
Key SW

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Theft Deterrent Keyless Entry.Engine Immobiliser System. Dtc B2780 Push Switch / Key Unlock Warning Switch Malfunction


INSPECTION PROCEDURE

NOTICE:
  1. When replacing the transponder key ECU assembly, refer to the Service Bulletin.
  2. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
1.CLEAR DTC

  1. Clear the DTCs (HILUX_TGN26 RM000000Z3I00TX.html).


NEXT


2.CHECK FOR DTC

  1. Check for DTCs (HILUX_TGN26 RM000000Z3I00TX.html).

    OK:
    DTC B2780 is not output.


NG
Go to step 3
OK

USE SIMULATION METHOD TO CHECK (HILUX_TGN26 RM000004QR7008X.html)

3.INSPECT UNLOCK WARNING SWITCH ASSEMBLY


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Theft Deterrent Keyless Entry.Engine Immobiliser System. Dtc B2780 Push Switch / Key Unlock Warning Switch Malfunction

  1. Remove the unlock warning switch assembly (HILUX_TGN26 RM000002ZQ6038X.html).

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    1 - 2
    		Pushed
    		Below 1 Ω
    Not pushed
    		10 kΩ or higher
    Text in Illustration
    *a
    		Pushed
    *b
    		Not pushed


NG
REPLACE UNLOCK WARNING SWITCH ASSEMBLY (HILUX_TGN26 RM000002ZQ6038X.html)
OK


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

  1. Disconnect the G10 unlock warning switch assembly connector.

  1. Disconnect the G26 transponder key ECU assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G10-1 - G26-3 (KSW)
    		Always
    		Below 1 Ω
    G10-1 or G26-3 (KSW) - Body ground
    		Always
    		10 kΩ or higher
    G10-2 - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TRANSPONDER KEY ECU ASSEMBLY