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Home › Lexus › 2004 › ES 330 › Repair and Diagnosis › External Pages › Different car › Section 142 (Dynamic Laser Cruise Control System - Diagnosis) › Cruise 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 CRUISE CONTROL MAIN SWITCH 
    1. Disconnect the cruise control main switch connector.
    2. Measure the resistance between terminal 1 and 3 of the cruise control main switch connector when the cruise control main switch is operated.

      Standard: 

      CRUISE CONTROL MAIN SWITCH SPECIFICATION

      Switch position Resistance (Ω)
      Neutral 10 kΩ or higher
      +/RES 210 to 270
      -/SET 560 to 700
      CANCEL 1,380 to 1,700
      Fig 1: Inspecting Cruise Control Main Switch
      G03061541Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check continuity between terminals 1 and 3 of cruise control main switch connector when the main switch is held on and off.

      Standard: 

      CRUISE CONTROL MAIN SWITCH SPECIFICATION

      Switch position Tester connection Specification
      OFF 1 - 3 10 kΩ or higher
      ON 1 - 3 Below 1 Ω
    4. Check continuity between terminals 1 and 2 of cruise control main switch connector when the mode switch is operated.

      Standard: 

      CRUISE CONTROL MAIN SWITCH SPECIFICATION

      Switch position Tester connection Specification
      MODE 1 - 2 Below 1 Ω
    1. NG : REPLACE CRUISE CONTROL MAIN SWITCH 
    2. OK : Go to next step. 
  2. CHECK WIRE HARNESS AND CONNECTOR (CRUISE CONTROL MAIN SWITCH - ECM) 
    1. Check for an open or short circuit in harness and connector between cruise control main switch and ECM.
    1. NG : REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 
    2. OK : Go to next step. 
  3. CHECK WIRE HARNESS AND CONNECTOR (CRUISE CONTROL MAIN SWITCH - BODY GROUND) 
    1. Check for an open or short circuit in harness and connector between cruise control main switch and body ground.
    1. NG : REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 
    2. OK : Go to next step. 
  4. INSPECT ECM 
    1. Remove the ECM with connector.
    2. Turn the ignition switch ON.
    3. Measure the voltage between terminal CCS (E5-24) of ECM and body ground, when cruise main switch is operated.

      Standard: 

      STANDARD

      Switch position Voltage
      Neutral 10 to 16 V
      CANCEL 6.6 to 10.1 V
      -/SET 4.5 to 7.1 V
      +/RES 2.3 to 4.0 V
      Main switch ON Below 1 V
      Fig 2: Measuring Voltage Between Terminal CCS (E5-24) Of ECM And Body Ground
      G03061542Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Measure the voltage between terminal CCHG (E6-28) of ECM and body ground, when cruise control main switch is operated.

      Standard: 

      INSPECTING ECM STANDARD

      Switch position Voltage
      MODE Below 1 V
      Neutral 10 to 14 V
      Fig 3: Measuring Voltage Between Terminal CCHG (E6-28) Of ECM And Body Ground
      G03061543Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE ECM, see  ECM  . 
    2. OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON  PROBLEM SYMPTOMS TABLE  . 
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