Code No. P1A48: Output Circuit Of Drive Battery Cooling Fan Abnormal




TROUBLE JUDGEMENT


Check Conditions
  • The power supply mode of the electric motor switch is ON, or the drive battery starts to be charged.
Judgement Criterion
  • The abnormal drive battery cooling fan output circuit is detected.

FAIL-SAFE AND BACKUP FUNCTION



  • Not available

PROBABLE CAUSES



  • The drive battery cooling fan is failed.
  • Short circuits to power supply system of drive battery cooling fan circuit; poor contact of connector.
  • The BMU is failed.

DIAGNOSIS PROCEDURE


STEP 1. Voltage measurement at drive battery connector (FPWM line).


(1)Disconnect the connector, and measure at the female side.
(2)Operate the electric motor switch without depressing the brake pedal and turn ON the power supply mode of electric motor switch.
(3)Check the voltage between the drive battery connector (FPWM line) and body earth.
OK: 0 - 0.1 V

Q. Is the check result normal?

Go to Step 4.
Go to Step 2.

STEP 2. Check of short to power supply in FPWM line between drive battery connector and BMU connector.


Q. Is the check result normal?

Go to Step 3.
Repair the connector(s) or wiring harness.

STEP 3. M.U.T.-III diagnosis code.


Q. Is the diagnosis code stored?

Replace the BMU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

STEP 4. M.U.T.-III diagnosis code.


Q. Is the diagnosis code stored?

Remove the battery tray cover (Refer to ). Then, go to Step 5.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

STEP 5. Check of short to power supply in FPWM line between drive battery connector and battery cooling fan connector.


Q. Is the check result normal?

Replace the drive battery cooling fan. Then, assemble the drive battery assembly (Refer to ).
Repair the connector(s) or wiring harness. Then, assemble the drive battery assembly (Refer to ).