SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 692 (AIR CONDITIONING SYSTEM DIAGNOSTICS)BACK-UP POWER SOURCE 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 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT CLOCK ASSY 
    1. Turn the ignition switch to the ON position.
    2. Set the time displayed on the clock assy to any time but 0:00.
    3. Turn the ignition switch OFF.
    4. Turn the ignition switch to the ON position.
    5. Confirm that the time displayed on the clock assy shows any time but 0:00.

      OK: 

      Time displayed on the clock assy is any time but 0:00 

    Fig 1: Locating Clock Assy
    G03036793Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The A/C amplifier and clock assy use the D.C.C fuse for backup power source. If the D.C.C fuse fails, clock assy backup power source also fails.

    1. NG: CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED FAILURE FUSE (D.C.C FUSE) 
    2. OK: Go to Next Step. 
  2. INSPECT FUSE (ECU-B) 
    1. Remove the ECU-B fuse from the driver side J/B.
    2. Measure the resistance according to the value(s) in ECU-B FUSE RESISTANCE  .

      Standard: 

      ECU-B FUSE RESISTANCE

      Tester item Condition Specified condition
      ECU-B fuse Always Below 1 Ω
    1. NG: CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED FAILURE FUSE 
    2. OK: Go to Next Step. 
  3. INSPECT AIR CONDITIONING AMPLIFIER (B - GND) 
    1. Remove the A/C amplifier assy and disconnect the connector.
    2. Measure the voltage according to the value(s) in AIR CONDITIONING AMPLIFIER (B - GND) VOLTAGE  .

      Standard: 

      AIR CONDITIONING AMPLIFIER (B - GND) VOLTAGE

      Tester connection Condition Specified condition
      A11-20 (B) - A11-1 (GND) Always 10 to 14 V
      Fig 2: Inspecting Air Conditioning Amplifier (B - Gnd)
      G03036794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   4 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE  TERMINALS OF ECU  ) 
  4. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BODY GROUND) (SEE  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
    1. Measure the resistance according to the value(s) in A/C AMPLIFIER - BODY GROUND RESISTANCE  .

      Standard: 

      A/C AMPLIFIER - BODY GROUND RESISTANCE

      Tester connection Condition Specified condition
      A11-1 (GND) - Body ground Always Below 1 Ω
      Fig 3: Checking Harness & Connector (A/C Amplifier - Body Ground)
      G03036795Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (D.C.C FUSE - A/C AMPLIFIER) 
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.