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Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Corolla and 2003 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
  1. INPUT SIGNAL CHECK 
    1. See input signal check on page 05-745.
    2. Check the indicator light operation when each of the SET/COAST, RESUME/ACCEL and CANCEL is turned on.

      OK: 

      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. 

      Fig 1: Checking Input Signal
      G02861235Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

      OK: 

      VOLTAGE RESISTANCE SPECIFICATION

      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 - 11.4V
      Fig 2: Identifying Terminal Voltage (CCS)
      G02861236Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 wheel center pad (See OVERHAUL ).
    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.

      OK: 

      CONTINUITY RESISTANCE CHART

      Switch Position Resistance
      Neutral infin (No continuity)
      CRUISE ON-OFF 0 Ω (Continuity)
      RES/ACC 210 - 270 Ω
      SET/COAST 560 - 700 Ω
      CANCEL 1,380 - 1,700 Ω
      Fig 3: Identifying Terminals 2 (CCS) And 3 (ECC) Of Control Switch Assy
      G02861237Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 ASSY) 
    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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