Cruise Control System (For 2Ad-Fhv) Tc And Cg Terminal Circuit

Cruise Control System. Lexus Is250, Is220D. Gse20 Ale20
Cruise Control. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WIRE HARNESS (TERMINAL TC of DLC3 - ECM)

CHECK WIRE HARNESS (TERMINAL CG of DLC3 - BODY GROUND)

CHECK WIRE HARNESS (TERMINAL TC of DLC3 - BODY GROUND)

CRUISE CONTROL SYSTEM (for 2AD-FHV) - 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 Is250, Is220D. Gse20 Ale20.Cruise Control.Cruise Control System.Cruise Control System (For 2Ad-Fhv)  Tc And Cg Terminal Circuit


INSPECTION PROCEDURE

1.CHECK WIRE HARNESS (TERMINAL TC of DLC3 - ECM)
Lexus Is250, Is220D. Gse20 Ale20.Cruise Control.Cruise Control System.Cruise Control System (For 2Ad-Fhv)  Tc And Cg Terminal Circuit
  1. Disconnect the A49 connector from the ECM.

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

    Standard resistance:
    Tester Connection
    Condition
    Specified Condition
    A49-26 (TC) - J21-13 (TC)
    Always
    Below 1 Ω


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


2.CHECK WIRE HARNESS (TERMINAL CG of DLC3 - BODY GROUND)
Lexus Is250, Is220D. Gse20 Ale20.Cruise Control.Cruise Control System.Cruise Control System (For 2Ad-Fhv)  Tc And Cg Terminal Circuit
  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester connection
    Condition
    Specified condition
    J21-4 (CG) - Body ground
    Always
    Below 1 Ω


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


3.CHECK WIRE HARNESS (TERMINAL TC of DLC3 - BODY GROUND)
Lexus Is250, Is220D. Gse20 Ale20.Cruise Control.Cruise Control System.Cruise Control System (For 2Ad-Fhv)  Tc And Cg Terminal Circuit
  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    Condition
    Specified Condition
    J21-13 (TC) - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE