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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 516 (CAN COMMUNICATION SYSTEM - DIAGNOSIS)POWER STEERING ECU COMMUNICATION STOP MODEINSPECTION 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 Prius. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CAN BUS LINE FOR DISCONNECTION (POWER STEERING ECU SUB BUS LINE) 
    1. Turn the power switch off.
    2. Disconnect the power steering ECU connector (P8).
    3. Measure the resistance according to the value(s) in the table below.

    Standard: 

    TESTER CONNECTION SPECIFIED VALUE

    Tester Connection Condition Specified value
    P8-1 (CANH) - P8-7 (CANL) Power Switch OFF 54 to 69 Ω
    Fig 1: Disconnecting P8 ECU Connector & Measuring Resistance
    G02919868Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE POWER STEERING ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

    OK: Go to next step. 

  2. CHECK WIRE HARNESS (IG, PGND) 
    1. Disconnect the power steering ECU connector (P7).
    2. Measure the resistance according to the value(s) in the table below.
    3. Measure the voltage according to the value(s) in the table below.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION

    Tester Connection Condition Specified Condition
    P7-2 (PGND) - Body ground Always Below 1 Ω
    P8-6 (IG) - Body ground Power Switch ON (IG) 10 to 14 V
    Fig 2: Disconnecting Power Steering ECU Connector (P7)
    G02919869Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 

    OK: REPLACE POWER STEERING ECU ASSY 

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.