Dynamic Radar Cruise Control System Cruise Control Switch Circuit

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
Cruise Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (CRUISE CONTROL MAIN SWITCH)

INSPECT CRUISE CONTROL MAIN SWITCH

INSPECT CRUISE CONTROL SWITCH WIRE

INSPECT SPIRAL CABLE

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - ECM AND BODY GROUND)

DYNAMIC RADAR CRUISE CONTROL SYSTEM - Cruise Control Switch Circuit


DESCRIPTION

The cruise control main switch is used to operate 8 functions: SET, - (COAST), TAP-DOWN, RES (RESUME), + (ACCELERATION), TAP-UP, CANCEL and MODE. The SET, TAP-DOWN and - (COAST) functions, and the RES (RESUME), TAP-UP and + (ACCELERATION) functions are operated with the same switch. The cruise control main switch is an automatic return type switch which turns on only while operating it in each arrow direction and turns off after releasing it. The internal contact point of the cruise control main switch is turned on with the switch operation. Then the ECM reads the resistance value that has been changed by the switch operation to control MODE, SET, - (COAST), RES (RESUME), + (ACCELERATION) and CANCEL. The dynamic radar cruise control system has two cruise control modes: the constant speed control mode and vehicle-to-vehicle distance control mode.
HINT:
  1. The vehicle-to-vehicle distance control mode is always selected when starting up the dynamic radar cruise control system.
  2. The operation of the constant speed control mode is the same as the cruise control system.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Cruise Control.Cruise Control System.Dynamic Radar Cruise Control System Cruise Control Switch Circuit


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (CRUISE CONTROL MAIN SWITCH)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Cruise Control.Cruise Control System.Dynamic Radar Cruise Control System Cruise Control Switch Circuit

  1. Using the intelligent tester, read the Data List (Click here).

    Radar Cruise
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    CCS Main SW M-CPU
    		Cruise control main switch (Main CPU) / ON or OFF
    		ON: Cruise control main switch (Main CPU) on
    OFF: Cruise control main switch (Main CPU) off
    		-
    Cancel Switch
    		CANCEL switch signal / ON or OFF
    		ON: CANCEL switch on
    OFF: CANCEL switch off
    		-
    SET/COAST Switch
    		-SET switch signal / ON or OFF
    		ON: -SET switch on
    OFF: -SET switch off
    		-
    RES/ACC Switch
    		+RES switch signal / ON or OFF
    		ON: +RES switch on
    OFF: +RES switch off
    		-
    CCS Main SW S-CPU
    		Cruise control main switch (Sub CPU) / ON or OFF
    		ON: Cruise control main switch (Sub CPU) on
    OFF: Cruise control main switch (Sub CPU) off
    		-
    OK:
    The intelligent tester display changes according to operation of cruise control main switch.


NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

2.INSPECT CRUISE CONTROL MAIN SWITCH

Land Cruiser. Urj200, 202 Grj200 Vdj200.Cruise Control.Cruise Control System.Dynamic Radar Cruise Control System Cruise Control Switch Circuit

  1. Remove the cruise control main switch (Click here).

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    1 (ECC) - 3 (CCS)
    		Neutral
    		1 MΩ or higher
    Pushed to +RES
    		235 to 245 Ω
    Pushed to -SET
    		620 to 640 Ω
    Pushed to CANCEL
    		1510 to 1570 Ω
    Main switch pushed off
    		1 MΩ or higher
    Main switch pushed on
    		Below 2.5 Ω
    1 (ECC) - 2 (R/N)
    		MODE switch pushed on
    		Below 2.5 Ω
    MODE switch off
    		1 MΩ or higher


NG
REPLACE CRUISE CONTROL MAIN SWITCH (Click here)
OK


3.INSPECT CRUISE CONTROL SWITCH WIRE
Land Cruiser. Urj200, 202 Grj200 Vdj200.Cruise Control.Cruise Control System.Dynamic Radar Cruise Control System Cruise Control Switch Circuit

  1. Remove the cruise control switch wire.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    z37-3 - 3
    		Always
    		Below 1 Ω
    z37-1 - 2
    z37-4 - 1
    z37-3 - Body ground
    		Always
    		10 kΩ or higher
    z37-1 - Body ground
    z37-4 - Body ground


NG
REPLACE CRUISE CONTROL SWITCH WIRE
OK


4.INSPECT SPIRAL CABLE
Land Cruiser. Urj200, 202 Grj200 Vdj200.Cruise Control.Cruise Control System.Dynamic Radar Cruise Control System Cruise Control Switch Circuit

  1. Check the spiral cable and connector for scratches, cracks, dents and chips. If any defects are found, replace the spiral cable with a new one.

  1. Check the spiral cable.

    1. Set the spiral cable to the center position (Click here).

    2. After setting the spiral cable to the center position, rotate the spiral cable 2.5 times clockwise, and measure the resistance according to the value(s) in the table below. Then rotate the spiral cable 5 times counterclockwise, and measure the resistance according to the value(s) in the table below.

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      z37-3 - E12-1 (CCS)
      		Always
      		Below 1 Ω
      z37-1 - E12-7 (R/N)
      z37-4 - E12-2 (ECC)

    3. After setting the spiral cable to the center position, rotate the spiral cable 2.5 times clockwise. Then while rotating the spiral cable 5 times counterclockwise, measure the resistance according to the value(s) in the table below.

      NOTICE:
      As the spiral cable may break, do not rotate the spiral cable more than the specified amount.
      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      z37-3 - E12-1 (CCS)
      		Always
      		Below 1 Ω
      z37-1 - E12-7 (R/N)
      z37-4 - E12-2 (ECC)


NG
REPLACE SPIRAL CABLE (Click here)
OK


5.CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - ECM AND BODY GROUND)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Cruise Control.Cruise Control System.Dynamic Radar Cruise Control System Cruise Control Switch Circuit

  1. Disconnect the E12 spiral cable connector.

  1. Disconnect the A38*1 or A52*2 ECM connector.

    1. *1: for LHD
    2. *2: for RHD

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

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    E12-1 (CCS) - A38-45 (CCS)
    		Always
    		Below 1 Ω
    E12-7 (R/N) - A38-37 (CCHG)
    E12-1 (CCS) - Body ground
    		Always
    		10 kΩ or higher
    E12-7 (R/N) - Body ground
    E12-2 (ECC) - Body ground
    		Always
    		Below 1 Ω
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    E12-1 (CCS) - A52-45 (CCS)
    		Always
    		Below 1 Ω
    E12-7 (R/N) - A52-37 (CCHG)
    E12-1 (CCS) - Body ground
    		Always
    		10 kΩ or higher
    E12-7 (R/N) - Body ground
    E12-2 (ECC) - Body ground
    		Always
    		Below 1 Ω
Result
Result
Proceed to
OK (for 1UR-FE)
A
OK (for 3UR-FE)
B
NG
C


B
REPLACE ECM (Click here)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

REPLACE ECM (Click here)