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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 623 (AIR CONDITIONING SYSTEM - DIAGNOSTICS)IG 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. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUSE (HTR FUSE) 
    1. Remove the HTR fuse from the driver side J/B.
    2. Check that the continuity exists of HTR fuse.
    1. NG: REPLACE FUSE 
    2. OK: Go to next step. 
  2. CHECK HARNESS AND CONNECTOR (BETWEEN HEATER CONTROL HOUSING SUB-ASSY AND BATTERY) 
    1. Remove the A/C amplifier assy with connectors still connected.
    2. Measure voltage according to the value (s) in TESTER CONNECTED CONDITION SPECIFICATION  .

      Standard: 

      TESTER CONNECTED CONDITION SPECIFICATION

      Tester connected Condition Specified condition
      A13-19 (IG+) - Body ground Ignition switch ON 10 to 14 V
      A13-19 (IG+) - Body ground Ignition switch OFF 0 V
      Fig 1: Checking Harness & Connector (Between Heater Control Housing Sub-Assy & Battery)
      G02894814Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE 
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.