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Inspection Procedure

  1. INPUT SIGNAL CHECK 
    1. See input signal check PRE-CHECK .
    2. Check the indicator light operation when each of the SET/COAST, RESUME/ACCEL and CANCEL is turned ON.

      OK: 

      Fig 1: Identifying Input Signals & Indicator Light Blinking Patterns
      G02916130Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      SET/COAST, RESUME/ACCEL switch: 

      The signals shown in the table on the left should be output when each switch is ON. The signal should disappear when the switch is turned OFF. 

      CANCEL switch: 

      The indicator light goes off when the cancel switch is turned ON. 

    1. OK: WAIT AND SEE 
    2. NG: GO TO NEXT STEP. 
  2. INSPECT TERMINAL VOLTAGE (CCS) 
    1. Remove the cruise control ECU assy with the connector being connected.
    2. Turn the ignition switch to ON.
    3. Measure the voltage between terminals 11 (CCS) of the cruise control ECU assy connector and the body ground when each control switch is operated.
      Fig 2: Identifying CCS (+) Connector
      G02916131Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

      SWITCH POSITION VOLTAGE

      Switch Position Voltage
      Neutral 10 - 16 V
      CRUISE ON-OFF Below 0.5 V
      RES/ACC 2.3 - 4.5 V
      SET/COAST 4.5 - 8.1 V
      CANCEL 6.6 - 11.4 V
    1. NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
    2. OK: GO TO NEXT STEP. 
  3. INSPECT CRUISE CONTROL MAIN SWITCH ASSY 
    1. Remove the STEERING COLUMN ASSY
    2. Disconnect the control switch assy connector.
    3. Check continuity between terminals 2 (CCS) and 3 (ECC) of control switch assy connector when cruise control main switch assy is held ON and OFF.
      Fig 3: Testing Control Switch Assy
      G02916132Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

      SWITCH POSITION RESISTANCE

      Switch Position Resistance
      Neutral infinity (No continuity)
      CRUISE ON-OFF 0 Ω(Continuity)
      RES/ACC 210 - 270Ω
      SET/COAST 560 - 700Ω
      CANCEL 1,380 - 1,700Ω
    1. NG: REPLACE CRUISE CONTROL MAIN SWITCH ASSY 
    2. OK: GO TO NEXT STEP. 
  4. CHECK HARNESS AND CONNECTOR (BETWEEN CRUISE CONTROL MAIN SWITCH ASSY AND BODY GROUND) 
    1. Check for open and short circuit in harness and connector between cruise control main switch assy and body ground (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP. 
  5. CHECK HARNESS AND CONNECTOR (BETWEEN CRUISE CONTROL ECU ASSY AND CRUISE CONTROL MAIN SWITCH) 
    1. Check for open and short circuit in harness and connector between cruise control ECU assy and cruise control main switch assy (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP. 
  6. INPUT SIGNAL CHECK (See step   1 ) 
    1. OK: WAIT AND SEE 
    2. NG: CHECK AND REPLACE CRUISE CONTROL ECU ASSY (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
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