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Inspection Procedure

WARNING: This page is about a different car, the 2005 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check voltage between terminal CCS of ECM connector and body ground. 

    PREPARATION: 

    1. Remove the ECM with connector still connected.
    2. Turn ignition switch ON.

    CHECK: 

    Measure voltage between terminal CCS of ECM connector and body ground, when each of the -/SET, +RES and CANCEL is turned ON.

    OK: 

    Fig 1: Checking Voltage Between Terminal CCS Of ECM Connector & Body Ground
    G03070915Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SWITCH POSITION VOLTAGE SPECIFICATION

    Switch Position Voltage
    Neutral 9 -- 14 V
    +/RES 2.1 -- 4 V
    -/SET 4 -- 7.1 V
    CANCEL 6 -- 10.1 V
    1. OK: Proceed to next circuit inspection shown on  PROBLEM SYMPTOMS TABLE   . 
    2. NG: Go to next step. 
  2. Check main switch continuity. 

    PREPARATION: 

    1. Remove steering wheel center pad (See STEERING WHEEL ).
    2. Disconnect the control switch connector.

    CHECK: 

    1. Measure resistance between terminals 4 and 5 of cruise control switch connector when control switch is operated.
      SWITCH POSITION VOLTAGE SPECIFICATION

      Switch position Resistance (Ω)
      Neutral infiniti (No continuity)
      +/RES 210 -- 270
      -/SET 560 -- 700
      CANCEL 1380 -- 1700
    2. Check continuity between terminals 4 and 5 of control switch connector when main switch is held on and off.

      OK: 

      SWITCH TESTER CONNECTION SPECIFICATION

      Switch position Tester connection Specified condition
      OFF 4 -- 5 No continuity
      ON 4 -- 5 Continuity
      Fig 2: Checking Continuity Between Terminals 4 & 5 Of Control Switch Connector
      G03070916Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. NG: Replace control switch. 
      2. OK: Go to next step. 
  3. Check harness and connector between ECM and cruise control switch, cruise control switch and body ground (See  HOW TO PROCEED WITH TROUBLESHOOTING  ). 
    1. NG: Repair or replace harness or connector. 
    2. OK: Go to next step. 
  4. Check cruise control indicator light (See  COMBINATION METER  .) 
    1. NG: Replace combination meter. 
    2. OK: Check and replace ECM (See  HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION  ). 
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