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Home >> Toyota >> 2004 >> Sienna XLE, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Dynamic Laser Cruise Control System - Diagnosis >> Cruise Control Switch Circuit >> Inspection Procedure

Inspection Procedure

  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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