Dtc B2660 Steering Wheel Switch Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS

INSPECT STEERING PAD SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - DRIVING SUPPORT SWITCH CONTROL ECU)

INSPECT SPIRAL CABLE SUB-ASSEMBLY

DTC B2660 Steering Wheel Switch Malfunction


DESCRIPTION

This code is output when any steering pad switch is continuously on for a period of 60 seconds.

DTC Code
DTC Detection Condition
Trouble Area
B2660
The driving support switch control ECU detects a malfunction in the steering pad switch.
  1. Harness or connector
  2. Driving support switch control ECU
  3. Spiral cable sub-assembly
  4. Steering pad switch assembly

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System. Dtc B2660 Steering Wheel Switch Malfunction


INSPECTION PROCEDURE

1.READ VALUE USING GTS

  1. Using the GTS, read the Data List (LandCruiser RM0000012G70JTX.html).


D-SEAT SW
Tester Display
Measurement Item/Range
Normal Condition
Diagnostic Note
Steering Wheel Menu Switch
MENU switch/OFF or ON
OFF: MENU switch off
-
ON: MENU switch on
Steering Wheel Enter Switch
ENTER switch/OFF or ON
OFF: ENTER switch off
-
ON: ENTER switch on
Steering Wheel Up Switch
UP/DOWN UP switch/OFF or ON
OFF: UP/DOWN UP switch off
-
ON: UP/DOWN UP switch on
Steering Wheel Down Switch
UP/DOWN DOWN switch/OFF or ON
OFF: UP/DOWN DOWN switch off
-
ON: UP/DOWN DOWN switch on
OK:
The value displayed on the intelligent tester changes with the actual steering pad switch operation.


NG
Go to step 2
OK

REPLACE DRIVING SUPPORT SWITCH CONTROL ECU (LandCruiser RM00000466X024X.html)

2.INSPECT STEERING PAD SWITCH ASSEMBLY


  1. Remove the steering pad switch assembly (LandCruiser RM0000039SA01YX.html).


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System. Dtc B2660 Steering Wheel Switch Malfunction


    Text in Illustration
    *a
    		Front view of wire harness connector
    (to spiral cable sub-assembly)
    		*b
    		MENU switch
    *c
    		ENTER switch
    		*d
    		UP/DOWN UP switch
    *e
    		UP/DOWN DOWN switch
    		-
    		-

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    z8-2 (DISP) - z8-3 (GND1)
    		MENU switch pushed
    		Below 2.5 Ω
    ENTER switch pushed
    		313 to 346 Ω
    UP/DOWN UP switch pushed
    		3049 to 3370 Ω
    UP/DOWN DOWN switch pushed
    		959 to 1060 Ω
    switch off
    		95 to 105 kΩ


NG
REPLACE STEERING PAD SWITCH ASSEMBLY (LandCruiser RM0000039SA01YX.html)
OK


3.CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - DRIVING SUPPORT SWITCH CONTROL ECU)

  1. Disconnect the G163*1 or G76*2 driving support switch control ECU connector.

    1. *1: for Automatic Transmission
    2. *2: for Manual Transmission

  1. Disconnect the G40 spiral cable sub-assembly connector.

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

    Standard Resistance:
    for Automatic Transmission
    Tester Connection
    		Condition
    		Specified Condition
    G40-9 (DISP) - G163-5 (SWI1)
    		Always
    		Below 1 Ω
    G40-10 (GND1) - G163-14 (SWI2)
    		Always
    		Below 1 Ω
    G40-9 (DISP) - G40-2 (ECC)
    		Always
    		10 kΩ or higher
    G40-9 (DISP) - G40-4 (EAU)
    		Always
    		10 kΩ or higher
    G40-9 (DISP) -G40-10 (GND1)
    		Always
    		10 kΩ or higher
    G40-9 (DISP) - Body ground
    		Always
    		10 kΩ or higher
    G40-10 (GND1) - Body ground
    		Always
    		10 kΩ or higher
    for Manual Transmission
    Tester Connection
    		Condition
    		Specified Condition
    G40-9 (DISP) - G76-3 (SWI1)
    		Always
    		Below 1 Ω
    G40-10 (GND1) - G76-4 (SWI2)
    		Always
    		Below 1 Ω
    G40-9 (DISP) - G40-2 (ECC)
    		Always
    		10 kΩ or higher
    G40-9 (DISP) - G40-4 (EAU)
    		Always
    		10 kΩ or higher
    G40-9 (DISP) -G40-10 (GND1)
    		Always
    		10 kΩ or higher
    G40-9 (DISP) - Body ground
    		Always
    		10 kΩ or higher
    G40-10 (GND1) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


4.INSPECT SPIRAL CABLE SUB-ASSEMBLY


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System. Dtc B2660 Steering Wheel Switch Malfunction

  1. Set the spiral cable to the center position (LandCruiser RM000002O8X02DX.html).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A-2 - B-9
    		Always
    		Below 1 Ω
    A-3 - B-10
    		Always
    		Below 1 Ω
    A-2 - A-3
    		Always
    		10 kΩ or higher
    A-2 - A-6
    		Always
    		10 kΩ or higher
    A-2 - A-8
    		Always
    		10 kΩ or higher
    A-2 - Body ground
    		Always
    		10 kΩ or higher
    A-3 - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *a
    		Connector A
    *b
    		Connector B


NG
REPLACE SPIRAL CABLE SUB-ASSEMBLY (LandCruiser RM000002O8X02DX.html)
OK

REPLACE DRIVING SUPPORT SWITCH CONTROL ECU (LandCruiser RM00000466X024X.html)