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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. CHECK OPERATION (OVERDRIVE) 
    1. Drive the vehicle after the engine warms up.
    2. Check that overdrive ON <--> OFF occurs by an operation of the O/D switch ON-OFF.
    1. NG: GO TO ELECTRONIC CONTROLLED AUTOMATIC TRANSMISSION[ECT] 
    2. YES: GO TO NEXT STEP. 
  2. INSPECT TERMINAL VOLTAGE (OD) 
    1. Remove the cruise control ECU assy with the connector still connected.
    2. Turn the ignition switch to ON.
    3. Disconnect the cruise control ECU assy connector.
    4. Measure voltage between terminal 14 (OD) of harness side connector of cruise control ECU assy and body ground.

      OK: 

      Voltage: 10 - 14 V 

      Fig 1: Identifying Terminal Voltage (OD)
      G02861221Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: GO to step   5 
    2. OK: GO TO NEXT STEP. 
  3. INSPECT TERMINAL VOLTAGE (ECT) 
    1. Connect the cruise control ECU assy connector.
    2. Perform the test drive after engine warms up.
    3. Check voltage between terminal 6 (ECT) of cruise control ECU assy connector and body ground when O/D switch is ON and OFF.

      OK: 

      VOLTAGE RESISTANCE SPECIFICATION

      O/D Switch Position Voltage
      ON Below 0.5 V
      OFF 8 - 16 V
      Fig 2: Identifying Terminal Voltage (ECT)
      G02861222Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
    2. NG: GO TO NEXT STEP. 
  4. CHECK HARNESS AND CONNECTOR (BETWEEN CRUISE CONTROL ECU ASSY AND ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID) 
    1. Check for open and short circuit in harness and connector between cruise control ECU assy and electronically controlled transmission solenoid (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: CHECK AND REPLACE CRUISE CONTROL ECU ASSY (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
  5. 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 ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: CHECK AND REPLACE CRUISE CONTROL ECU ASSY (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
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