Cruise Control System Tc And Cg Terminal Circuit

Cruise Control System. Lexus Gs430, Gs300. Uzs190 Grs190
Cruise Control. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WIRE HARNESS (TC OF DLC3 - ECM)

CHECK WIRE HARNESS (CG OF DLC3 - BODY GROUND)

CHECK WIRE HARNESS (TC OF DLC3 - BODY GROUND)

CRUISE CONTROL SYSTEM - TC and CG Terminal Circuit


DESCRIPTION

Connecting terminals TC and CG of the DLC3 causes the system to enter self-diagnostic mode. If a malfunction is present, DTCs will be output.
HINT:
When a particular warning light remains blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in the relevant ECU is suspected.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Cruise Control.Cruise Control System.Cruise Control System  Tc And Cg Terminal Circuit


INSPECTION PROCEDURE

1.CHECK WIRE HARNESS (TC OF DLC3 - ECM)


    Lexus Gs430, Gs300. Uzs190 Grs190.Cruise Control.Cruise Control System.Cruise Control System  Tc And Cg Terminal Circuit
  1. Disconnect the A7 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    Condition
    Specified Condition
    A7-3 (TC) - L16-13 (TC)
    Always
    Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR (DLC3 - ECM)
OK


2.CHECK WIRE HARNESS (CG OF DLC3 - BODY GROUND)
Lexus Gs430, Gs300. Uzs190 Grs190.Cruise Control.Cruise Control System.Cruise Control System  Tc And Cg Terminal Circuit
  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    Condition
    Specified Condition
    L16-4 (CG) - Body ground
    Always
    Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR (DLC3 - BODY GROUND)
OK


3.CHECK WIRE HARNESS (TC OF DLC3 - BODY GROUND)
Lexus Gs430, Gs300. Uzs190 Grs190.Cruise Control.Cruise Control System.Cruise Control System  Tc And Cg Terminal Circuit
  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    Condition
    Specified Condition
    L16-13 (TC) - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE WIRE HARNESS AND EACH ECU
OK

REPLACE ECM