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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. INSPECT TERMINAL VOLTAGE (IDL) 
    1. Remove the cruise control ECU assy with connector still connected.
    2. Disconnect the ECM connector.
    3. Turn the ignition switch to ON.
    4. Measure voltage between terminal 13 (IDL) of cruise control ECU assy connector and body ground when the throttle valve is fully closed and fully opened.

      OK: 

      VOLTAGE RESISTANCE SPECIFICATION

      Throttle Valve Position Voltage
      Fully opened 10 - 16 V
      Fully closed Below 1.5 V
      Fig 1: Identifying Terminal Voltage (IDL)
      G02861216Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: PROCEED TO NEXT CIRCUIT INSPECTION) SHOWN ON PROBLEM SYMPTOMS TABLE (See  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    2. NG: GO TO NEXT STEP. 
  2. CHECK HARNESS AND CONNECTOR (BETWEEN CRUISE CONTROL ECU ASSY AND ECM) 
    1. Check for open and short circuit in harness and connector between cruise control ECU assy and ECM (See HOW TO PROCEED WITH TROUBLESHOOTING ).
    1. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. NG: CHECK AND REPLACE CRUISE CONTROL ECU ASSY (See  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
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