Dtc B1586 Open In Immobiliser Communication Circuit

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

CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER - ECM)

CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER - TRANSPONDER KEY ECU)

CHECK TRANSPONDER KEY ECU ASSEMBLY (TERMINAL EFIO)

CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER - BATTERY AND BODY GROUND)

REPLACE ECM

REGISTER ECU COMMUNICATION ID

CLEAR DTC

CHECK FOR DTC

REPLACE TRANSPONDER KEY ECU ASSEMBLY

REGISTER ECU COMMUNICATION ID

CLEAR DTC

CHECK FOR DTC

DTC B1586 Open in Immobiliser Communication Circuit


DESCRIPTION

When the communication line (EFIO - BLK4) between the transponder key ECU assembly and telephone transceiver assembly is stuck on HI output while ignition switch is ON, the telephone transceiver assembly stores DTC B1586.
HINT:
Before troubleshooting for these DTCs, make sure no engine immobiliser system DTCs are present. If present, troubleshoot the engine immobiliser system DTCs first.

DTC Code
DTC Detection Condition
Trouble Area
B1586
The communication line (EFIO - BLK4) between the transponder key ECU assembly and telephone transceiver assembly is stuck on HI while ignition switch is ON.
  1. Telephone transceiver assembly
  2. Transponder key ECU assembly
  3. ECM
  4. Harness or connector

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Theft Deterrent Keyless Entry.Engine Immobiliser System. Dtc B1586 Open In Immobiliser Communication Circuit


INSPECTION PROCEDURE

NOTICE:
  1. When replacing the telephone transceiver assembly, transponder key ECU assembly or ECM, refer to the Service Bulletin.
  2. When the telephone transceiver assembly is replaced, it is necessary to set the contract mode.
  3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CLEAR DTC

  1. Clear the DTCs (HILUX_TGN26 RM0000044SM00EX.html).


NEXT


2.CHECK FOR DTC

  1. Check for DTCs (HILUX_TGN26 RM0000044SM00EX.html).

    OK:
    DTC B1586 is not output.
    Result
    Result
    		Proceed to
    DTC B1586 is output
    		A
    DTC B1586 and other DTCs are output
    		B


B
Go to DIAGNOSTIC TROUBLE CODE CHART (HILUX_TGN26 RM000004FMV00BX.html)
A


3.CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER - ECM)

  1. Disconnect the G144 telephone transceiver assembly connector.

  1. Disconnect the G38*1, G146*2, G148*3 or G156*4 ECM connector.

    1. *1: for 1KD-FTV (except DPF and i-ART), 2KD-FTV (except DPF)
    2. *2: for 2TR-FBE
    3. *3: for 1KD-FTV (for DPF), 2KD-FTV (for DPF)
    4. *4: for 1KD-FTV (for i-ART)

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

    Standard Resistance:
    for 1KD-FTV (except DPF and i-ART), 2KD-FTV (except DPF):
    Tester Connection
    		Condition
    		Specified Condition
    G144-8 (BLK3) - G38-30 (IMI)
    		Always
    		Below 1 Ω
    G144-8 (BLK3) or G38-30 (IMI) - Body ground
    		Always
    		10 kΩ or higher
    for 2TR-FBE:
    Tester Connection
    		Condition
    		Specified Condition
    G144-8 (BLK3) - G146-31 (IMI)
    		Always
    		Below 1 Ω
    G144-8 (BLK3) or G146-31 (IMI) - Body ground
    		Always
    		10 kΩ or higher
    for 1KD-FTV (for DPF), 2KD-FTV (for DPF):
    Tester Connection
    		Condition
    		Specified Condition
    G144-8 (BLK3) - G148-28 (IMI)
    		Always
    		Below 1 Ω
    G144-8 (BLK3) or G148-28 (IMI) - Body ground
    		Always
    		10 kΩ or higher
    for 1KD-FTV (for i-ART):
    Tester Connection
    		Condition
    		Specified Condition
    G144-8 (BLK3) - G156-28 (IMI)
    		Always
    		Below 1 Ω
    G144-8 (BLK3) or G156-28 (IMI) - Body ground
    		Always
    		10 kΩ or higher

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

    Standard Voltage:
    for 1KD-FTV (except DPF and i-ART), 2KD-FTV (except DPF):
    Tester Connection
    		Condition
    		Specified Condition
    G144-8 (BLK3) or G38-30 (IMI) - Body ground
    		Always
    		Below 1 V
    for 2TR-FBE:
    Tester Connection
    		Condition
    		Specified Condition
    G144-8 (BLK3) or G146-31 (IMI) - Body ground
    		Always
    		Below 1 V
    for 1KD-FTV (for DPF), 2KD-FTV (for DPF):
    Tester Connection
    		Condition
    		Specified Condition
    G144-8 (BLK3) or G148-28 (IMI) - Body ground
    		Always
    		Below 1 V
    for 1KD-FTV (for i-ART):
    Tester Connection
    		Condition
    		Specified Condition
    G144-8 (BLK3) or G156-28 (IMI) - Body ground
    		Always
    		Below 1 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER - TRANSPONDER KEY ECU)

  1. Disconnect the G144 telephone transceiver 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
    G144-2 (BLK4) - G26-13 (EFIO)
    		Always
    		Below 1 Ω
    G144-2 (BLK4) or G26-13 (EFIO) - Body ground
    		Always
    		10 kΩ or higher

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    G144-2 (BLK4) or G26-13 (EFIO) - Body ground
    		Always
    		Below 1 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK TRANSPONDER KEY ECU ASSEMBLY (TERMINAL EFIO)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Theft Deterrent Keyless Entry.Engine Immobiliser System. Dtc B1586 Open In Immobiliser Communication Circuit

  1. Using an oscilloscope, check the waveform.

    Measurement Condition
    Item
    		Content
    Tester Connection
    		G26-13 (EFIO) - G26-16 (GND)
    Tool Setting
    		10V/DIV., 100 ms./DIV.
    Condition
    		Ignition switch ON
    HINT:
    The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
OK:
Waveform is output normally (refer to illustration).
Text in Illustration
*1
Waveform
*a
Component with harness connected
(Transponder Key ECU Assembly)


NG
Go to step 6
OK

REPLACE TRANSPONDER KEY ECU ASSEMBLY

6.CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER - BATTERY AND BODY GROUND)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Theft Deterrent Keyless Entry.Engine Immobiliser System. Dtc B1586 Open In Immobiliser Communication Circuit

  1. Disconnect the G144 telephone transceiver assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G144-9 (E) - Body ground
    		Always
    		Below 1 Ω

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    G144-12 (+B) - G144-9 (E)
    		Always
    		11 to 14 V
    G144-6 (IG2) - G144-9 (E)
    		Ignition switch ON
    		11 to 14 V
Text in Illustration
*a
Front view of wire harness connector
(to Telephone Transceiver Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.REPLACE ECM

  1. Temporarily replace the ECM with a new one.

    1. for 2TR-FBE: HILUX_TGN26 RM000000VW2024X.html
    2. for 1KD-FTV: HILUX_TGN26 RM0000013Z001IX.html
    3. for 2KD-FTV: HILUX_TGN26 RM0000013Z001HX.html

NEXT


8.REGISTER ECU COMMUNICATION ID

  1. Reregister the ECU - ECM communication ID (Refer to the Service Bulletin).


NEXT


9.CLEAR DTC

  1. Clear the DTCs (HILUX_TGN26 RM0000044SM00EX.html).


NEXT


10.CHECK FOR DTC

  1. Check for DTCs (HILUX_TGN26 RM0000044SM00EX.html).

    OK:
    DTC B1586 is not output.


NG
Go to step 11
OK

END (ECM IS DEFECTIVE)

11.REPLACE TRANSPONDER KEY ECU ASSEMBLY

  1. Temporarily replace the transponder key ECU assembly with a new one (Refer to the Service Bulletin).


NEXT


12.REGISTER ECU COMMUNICATION ID

  1. Reregister the ECU - ECM communication ID (Refer to the Service Bulletin).


NEXT


13.CLEAR DTC

  1. Clear the DTCs (HILUX_TGN26 RM0000044SM00EX.html).


NEXT


14.CHECK FOR DTC

  1. Check for DTCs (HILUX_TGN26 RM0000044SM00EX.html).

    OK:
    DTC B1586 is not output.


NG
REPLACE TELEPHONE TRANSCEIVER ASSEMBLY
OK

END (TRANSPONDER KEY ECU IS DEFECTIVE)