On-Vehicle Inspection

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.

INSPECT BATTERY BLOWER ASSEMBLY
1. Check the operation.
  1. Connect the hand held tester to the DLC3.
    
    Fig 1: Connecting Hand Held Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Turn the power switch ON (IG).
  3. Select the item:
    DIAGNOSIS / OBD/MOBD / HV BATTERY / ACTIVE TEST / COOLING FAN SPD / 1 to 6.
  NOTE: If the check results are normal, do not perform the following check.
2. Inspect the resistance.
  1. Remove the service plug grip.
  2. Disconnect the connector of the battery blower motor.
  3. Using an ohmmeter, measure the resistance between terminals 1 and 2 of the connector.
    Standard: 9 Ω or less
    
    If the standard is not met, replace the battery blower assembly
    
    Fig 2: Measuring Resistance Between Terminals 1 & 2
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Inspect the voltage.
  1. Connect the connector of the blower motor.
  2. Using ohmmeter, measure the resistance between terminal 1 (GND) of the blower motor control connector and body ground.
    Standard: 1 Ω or less
  3. Connect the negative terminal of the auxiliary battery.
    Torque: 6.0 N.m (61 kgf.cm, 53 in.lbf)
    
    Fig 3: Identifying Blower Motor Control Connector Terminal 1 (GND)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Connect the hand held tester to the DLC3.
    
    Fig 4: Connecting Hand Held Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Turn the power switch ON (IG).
  6. Select the item:
    DIAGNOSIS / OBD/MOBD / HV BATTERY / ACTIVE TEST / COOLING FAN SPD / 1.
  7. Using a voltmeter, measure the voltage between terminals 1 (GND) of the blower motor connector and the body ground.
    Standard: 9 to 14 V
    
    Fig 5: Identifying Blower Motor Connector Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    NOTE: If the standard is not met (there is no voltage), there may be a defect in the power supply system relays or in the wire harness.
  8. Turn the power switch OFF, then disconnect the negative terminal of the auxiliary battery.
  9. Disconnect the battery blower motor, battery blower motor control, and connector of the battery ECU assembly.
  10. Using an ohmmeter, measure the resistance between the 2 terminals on the connectors of the battery blower motors on both sides of the vehicle, between the 4 terminals (VM) on the battery blower motor control, and between terminals B8 and 9 on the battery ECU assembly.
    Standard: All the terminals 1 Ω or less
    
    NOTE: If the standard is not met, repair or replace the wire harness and go back to step (a).
    
    Fig 6: Identifying Terminals For Measuring Resistance
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. Using an ohmmeter, measure the resistance between the terminal B8 - 10 (FCTL) on the connectors of the battery ECU assembly on both sides the vehicle and terminal 1 on the holder installed on the battery blower relay No. 1.
    Standard: 1 Ω or less
    
    NOTE: If the standard is not met, repair or replace the wire harness and go back to step (a).
    
    Fig 7: Identifying Holder Installed On Battery Blower Relay No. 1 Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. Reconnect all the disconnected connectors.
    NOTE: Do not connect the service plug grip.
  13. Connect the hand held tester to the DLC3.
  14. Turn the power switch ON (IG).
  15. Select the item:
    DIAGNOSIS / OBD/MOBD / HV BATTERY / ACTIVE TEST / COOLING FAN SPD / 1.
    
    Fig 8: Connecting Hand Held Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. Using a voltmeter, measure the voltage between terminals 1 (GND) and 2 (SI) of the battery blower motor control.
    Standard: 1 V or more
    
    NOTE: If the standard is not met, repair or replace the wire harness and go back to step (a).
    
    Fig 9: Identifying Battery Blower Motor Control Connector Terminals 1 (GND) And 2 (SI)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  17. Using a voltmeter, measure the voltage between the terminals on the blower motor connector.
    Standard: 2 to 4 V
    
    NOTE: If the standard is not met, repair or replace the wire harness and go back to step (a).
    
    Fig 10: Identifying Blower Motor Connector Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  18. Using a voltmeter, measure the voltage between terminals 1 (GND) and 4 (VM) of the blower motor control.
    Standard:
    
    A - 4 V to A - 2 V (A = (c) - (6))
    
    NOTE: If the standard is not met, repair or replace the wire harness and go back to step (a).
  19. Return to step (a) and perform the inspection again to reconfirm.
    
    Fig 11: Identifying Blower Motor Control Connector Terminals 1 (GND) And 4 (VM)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002