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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 518 (HYBRID BATTERY SYSTEM (DIAGNOSTICS))DTC P0A9B: HYBRID BATTERY TEMPERATURE SENSOR 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 Prius. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
  • Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from reconnecting it while you are servicing the high-voltage system.
  • After disconnecting the service plug grip, wait for at least 5 minutes before touching any of the high-voltage connectors or terminals.

HINT:

At least 5 minutes is required to discharge the high-voltage condenser inside the inverter.

  1. READ OUTPUT DTC (DTC P0A1F IS OUTPUT) 
    1. Connect the hand-held tester or the OBD II scan tool to the DLC3.
    2. Turn the power switch ON (IG).
    3. Turn the hand-held tester or the OBD II scan tool ON.
    4. On the hand-held tester, enter the following menus: DIAGNOSIS / OBD/MOBD / HV BATTERY / DTC INFO / TROUBLE CODES.

      For the OBD II scan tool, see its instruction manual.

    5. Read DTCs.
      1. Result: DTC P0A1F is output 

    YES: REPLACE BATTERY ECU ASSY (See  BATTERY ECU ASSY  ) 

    NO: Go to Next Step 

  2. CHECK CONNECTION OF BATTERY TEMPERATURE SENSOR CONNECTOR 
    CAUTION: Wear insulated gloves before performing the following operation.
    1. Turn the power switch OFF.
    2. Remove the service plug grip (see SERVICE PLUG GRIP ).
      NOTE: Turning the power switch ON (READY) with the service plug grip removed could cause malfunction. Therefore, never turn the power switch ON (READY) in this state.
    3. Check the connection condition of the B13 battery ECU connector.
      1. OK: Connector has been connected securely and there is no poor connection. 

      HINT:

      Since the battery temperature sensor is not available as a unit and if replacement is required, replace the entire HV battery assembly.

      NG: CONNECT SECURELY 

      Fig 1: Checking Connection Condition Of B13 Battery ECU Connector
      G02918057Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      REPLACE HV SUPPLY BATTERY ASSY (See  HV BATTERY  ) 

RENDER: 1.0x

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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.