Dtc C1A4A Skid Control Buzzer Circuit

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Pre-Crash Safety. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

CHECK TERMINAL VOLTAGE

CHECK HARNESS AND CONNECTOR (PRE-CRASH SAFETY CITY BUZZER - DRIVING SUPPORT ECU ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

INSPECT PRE-CRASH SAFETY CITY BUZZER (CONFIRM BUZZER OPERATION)

INSPECT PRE-CRASH SAFETY CITY BUZZER (UNIT INSPECTION)

REPLACE PRE-CRASH SAFETY CITY BUZZER

CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

DTC C1A4A Skid Control Buzzer Circuit


DESCRIPTION

The driving support ECU assembly operates the pre-crash alarm control by sending a buzzer request signal to the pre-crash safety city buzzer.
If the driving support ECU assembly detects a malfunction in the pre-crash safety city buzzer circuit, it stores DTC C1A4A.

DTC No.
DTC Detection Condition
Trouble Area
C1A4A
When the engine switch is on (IG) and the pre-crash alarm control is operating, either of the following conditions is met:
  1. A buzzer request signal is sent to the pre-crash safety city buzzer but the buzzer does not sound for 1 second or more.
  2. A buzzer request signal is not sent to the pre-crash safety city buzzer but the buzzer sounds for 1 second or more.
  1. Pre-crash safety city buzzer
  2. Driving support ECU assembly
  3. Harness or connector

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Pre-Crash Safety.Pre-Crash Safety System. Dtc C1A4A Skid Control Buzzer Circuit


INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses for circuits related to this system before performing the following procedure.
  2. When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
1.CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Body Electrical / Pre-Crash 2 / Trouble Codes.

  1. Clear the DTCs (Click here).

  1. Enter the following menus: Body Electrical / Pre-Crash 2 / Active Test.

  1. Perform the Active Test according to the display on the GTS.

    NOTICE:
    Perform the Active Test for 1 second or more.
    HINT:
    This DTC can be stored by performing the Active Test.

    Pre-Crash 2
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    PCS Crash Alarm Buzzer
    		Pre-crash safety city buzzer
    		ON/OFF
    		Test possible with engine switch on (IG), vehicle stopped

  1. Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC C1A4A is output.
    		A
    DTC C1A4A is not output.
    		B


B
USE SIMULATION METHOD TO CHECK (SYMPTOM SIMULATION) (Click here)
A


2.CHECK TERMINAL VOLTAGE


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Pre-Crash Safety.Pre-Crash Safety System. Dtc C1A4A Skid Control Buzzer Circuit

  1. Disconnect the pre-crash safety city buzzer connector.

    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Pre-crash Safety City Buzzer)

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

    Standard Voltage :
    Tester Connection
    		Condition
    		Specified Condition
    E5-2 (IG1) - Body ground
    		Engine switch on (IG)
    		11 to 14 V
    E5-2 (IG1) - Body ground
    		Engine switch off
    		Below 1 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (PRE-CRASH SAFETY CITY BUZZER - DRIVING SUPPORT ECU ASSEMBLY)

  1. Disconnect the pre-crash safety city buzzer connector.

  1. Disconnect the driving support ECU assembly connector.

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

    Standard Resistance :
    Tester Connection
    		Condition
    		Specified Condition
    E5-1 (BZ) - E164-3 (BZ)
    		Always
    		Below 1 Ω
    E5-1 (BZ) orE164-3 (BZ) - Body ground
    		Always
    		10 kΩ or higher
Result
Result
Proceed to
NG
A
OK
B


B
Go to step 6
A


4.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.


NEXT


5.CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Body Electrical / Pre-Crash 2 / Trouble Codes.

  1. Clear the DTCs (Click here).

  1. Enter the following menus: Body Electrical / Pre-Crash 2 / Active Test.

  1. Perform "Active Test" according to the display on the GTS.

    NOTICE:
    Perform the Active Test for 1 second or more.
    HINT:
    This DTC can be stored by performing the Active Test.

    Pre-Crash 2
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    PCS Crash Alarm Buzzer
    		Pre-crash safety city buzzer
    		ON/OFF
    		Test possible with engine switch on (IG), vehicle stopped

  1. Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC C1A4A is output.
    		A
    DTC C1A4A is not output.
    		B


B
REPAIR OR REPLACE HARNESS OR CONNECTOR
A


6.INSPECT PRE-CRASH SAFETY CITY BUZZER (CONFIRM BUZZER OPERATION)

  1. Turn the engine switch on (IG).

  1. Check if the pre-crash safety city buzzer is sounding.

Result
Result
Proceed to
The pre-crash safety city buzzer does not sound when the engine switch is on (IG).
A
The pre-crash safety city buzzer sounds continuously when the engine switch is on (IG).
B


B
Go to step 8
A


7.INSPECT PRE-CRASH SAFETY CITY BUZZER (UNIT INSPECTION)

  1. Remove the pre-crash safety city buzzer (Click here).

  1. Inspect the pre-crash safety city buzzer (Click here).

Result
Result
Proceed to
Pre-crash safety city buzzer is abnormal.
A
Pre-crash safety city buzzer is normal.
B


B
Go to step 10
A


8.REPLACE PRE-CRASH SAFETY CITY BUZZER

  1. Replace the pre-crash safety city buzzer (Click here).


NEXT


9.CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Body Electrical / Pre-Crash 2 / Trouble Codes.

  1. Clear the DTCs (Click here).

  1. Enter the following menus: Body Electrical / Pre-Crash 2 / Active Test.

  1. Perform "Active Test" according to the display on the GTS.

    NOTICE:
    Perform the Active Test for 1 second or more.
    HINT:
    This DTC can be stored by performing the Active Test.

    Pre-Crash 2
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    PCS Crash Alarm Buzzer
    		Pre-crash Safety City Buzzer
    		ON/OFF
    		Test possible with engine switch on (IG), vehicle stopped

  1. Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC C1A4A is output.
    		A
    DTC C1A4A is not output.
    		B


B
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

REPLACE DRIVING SUPPORT ECU ASSEMBLY (Click here)

10.CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Body Electrical / Pre-Crash 2 / Trouble Codes.

  1. Clear the DTCs (Click here).

  1. Enter the following menus: Body Electrical / Pre-Crash 2 / Active Test.

  1. Perform "Active Test" according to the display on the GTS.

    NOTICE:
    Perform the Active Test for 1 second or more.
    HINT:
    This DTC can be stored by performing the Active Test.

    Pre-Crash 2
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    PCS Crash Alarm Buzzer
    		Pre-crash Safety City Buzzer
    		ON/OFF
    		Test possible with engine switch on (IG), vehicle stopped

  1. Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC C1A4A is output.
    		A
    DTC C1A4A is not output.
    		B


B
USE SIMULATION METHOD TO CHECK (Click here)
A

REPLACE DRIVING SUPPORT ECU ASSEMBLY (Click here)