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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 (PI) 
    1. Turn the ignition switch to ON.
    2. Measure voltage between terminal 5 (PI) of cruise control ECU assy and body ground, when the cruise control main switch button is ON and OFF.

      OK: 

      VOLTAGE RESISTANCE SPECIFICATION

      Cruise Control Switch Button Position Voltage
      OFF 10 - 16 V
      ON Below 1.2 V
      Fig 1: Identifying Terminal Voltage (PI)
      G02861239Courtesy 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. 
  2. INSPECT COMBINATION METER ASSY (See  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    1. NG: REPLACE COMBINATION METER ASSY 
    2. OK: GO TO NEXT STEP. 
  3. CHECK HARNESS AND CONNECTOR (BETWEEN CRUISE CONTROL ECU ASSY AND COMBINATION METER ASSEMBLY) 
    1. Check for open and short circuit in harness and connector between cruise control ECU assy and combination meter assembly (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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