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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 861 (AIR CONDITIONING SYSTEM - DIAGNOSIS)CIRCUIT INSPECTIONWATER VALVE CONTROL SERVOMOTOR CIRCUITINSPECTION PROCEDURE
2004 Toyota Matrix XR, FWD, Standard

Inspection Procedure

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. Actuator check. 

    PREPARATION: 

    1. Set to the actuator check mode (See PRE-CHECK ).
    2. Press the UP switch and change it to step operation.

    CHECK: 

    Press the UP switch in order and check the operation of water valve.

    OK: 

    The condition of the water valve changes with the change in the temperature display, as shown in the table. 

    VOLTAGE CONDITION SPECIFICATION

    Display Code Water Valve
    0 - 2 SHUT
    3 - 9 OPEN
    Fig 1: Checking Actuator
    G03376784Courtesy 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. Check water valve control servomotor. 

    PREPARATION: 

    Remove water valve control servomotor (See WATER VALVE CONTROL SERVOMOTOR ).

    CHECK: 

    Connect positive (+) lead to terminal 1 and negative (-) lead to terminal 3.

    OK: 

    The lever moves smoothly to OPEN position. 

    CHECK: 

    Connect negative (-) lead to terminal 1 and positive (+) lead to terminal 2.

    OK: 

    The lever moves smoothly to SHUT position. 

    Fig 2: Identifying Water Valve Control Servomotor
    G03376785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : Replace water valve control servomotor assembly. 
    2. OK : Go to next step. 
  3. Check harness and connector between A/C ECU and water valve control servomotor (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    1. NG : Repair or replace harness or connector. 
    2. OK : Check and replace A/C ECU. 
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.