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Home › Lexus › 2004 › ES 330 › Repair and Diagnosis › External Pages › Different car › Section 141 (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 resistance between terminal 1 and 3 of the cruise control switch connector when cruise control main switch is operated.

      Standard: 

      CRUISE CONTROL MAIN SWITCH SPECIFICATIONS

      Switch condition Resistance (Ω)
      Neutral infinity (No continuity)
      +/RES 210 to 270
      -/SET 560 to 700
      CANCEL 1,380 to 1,700
      Fig 1: Inspecting Cruise Control Main Switch
      G03061451Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check continuity between terminals 1 and 3 of cruise control main switch connector when main switch button is held on and off.

      Standard: 

      CRUISE CONTROL MAIN SWITCH SPECIFICATIONS

      Switch condition Tester connection Specification
      OFF 1 - 3 No continuity
      ON 1 - 3 Continuity
    1. NG : REPLACE CRUISE CONTROL MAIN SWITCH 
    2. OK : Go to next step. 
  2. INSPECT STEERING PAD SWITCH LH 
    1. Check for open and short circuit in harness and connector between cruise control main switch side terminal 1 and ECM side terminal 4.
    2. Check for open and short circuit in harness and connector between cruise control main switch side terminal 3 and ECM side terminal 5.
    Fig 2: Inspecting Steering PAD Switch LH
    G03061452Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE STEERING PAD SWITCH LH 
    2. OK : Go to next step. 
  3. INSPECT ECM 
    1. Remove the ECM with connector.
    2. Ignition switch ON.
    3. Measure voltage between terminal CCS of ECM and body ground, when cruise control main switch is operated.

      Standard: 

      ECM TERMINALS SPECIFICATION

      Switch position Voltage
      Neutral 10 to 14 V
      CANCEL 6.6 to 10.1 V
      -/SET 4.5 to 7.1 V
      +/RES 2.3 to 4 V
      Main switch ON Below 1 V
      Fig 3: Identifying CCS Terminal Of ECM Connector
      G03061453Courtesy 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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