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Home › Lexus › 2004 › ES 330 › Repair and Diagnosis › External Pages › Different car › Section 142 (Dynamic Laser Cruise Control System - Diagnosis) › Distance Control Switch Circuit › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Remove the steering pad switch assembly.
      Fig 1: Checking Continuity Between Terminal 2 (DIST) And 4 (ECC) Of Steering Pad Switch Assembly Connector
      G03061544Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the continuity between terminal 2 (DIST) and 4 (ECC) of steering pad switch assembly connector when distance control switch is operated.

      Standard: 

      STEERING PAD SWITCH ASSEMBLY INSPECTING STANDARD

      Switch position Specified condition
      Distance control switch is ON Below 1 Ω
      Distance control switch is OFF 10 kΩ or higher

    HINT:

    When a malfunction is found on the distance control switch, replace the steering pad switch assembly.

    1. NG : REPLACE STEERING PAD SWITCH ASSEMBLY 
    2. OK : Go to next step. 
  2. CHECK WIRE HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - STEERING PAD SWITCH ASSEMBLY) 
    1. Check for an open or short circuit in harness and connector between the distance control ECU and the steering pad switch assembly.
    1. NG : REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 
    2. OK : Go to next step. 
  3. CHECK WIRE HARNESS AND CONNECTOR (STEERING PAD SWITCH ASSEMBLY - BODY GROUND) 
    1. Check for an open or short circuit in harness and connector between the steering pad switch assembly and body ground.
    1. NG : REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 
    2. OK : Go to next step. 
  4. INSPECT DISTANCE CONTROL ECU ASSEMBLY 
    1. Remove the distance control ECU with connector.
    2. Ignition switch ON.
    3. Measure the voltage between terminal MODE (D2-16) of the distance control ECU and body ground, when distance control switch is operated.

      Standard: 

      INSPECTION STANDARD

      Switch position Voltage
      Distance control switch is ON Below 1 V
      Distance control switch is OFF 10 to 14 V
      Fig 2: Measuring Voltage Between Terminal MODE (D2-16) Of Distance Control ECU And Body Ground
      G03061545Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE DISTANCE CONTROL ECU ASSEMBLY, see  REPLACEMENT  . 
    2. OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON  PROBLEM SYMPTOMS TABLE  . 
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