DTC P0A85-123: Hybrid Battery Pack Cooling Fan 1 Control Circuit High: Procedure

B → GO TO DTC CHART (HYBRID BATTERY SYSTEM) 

A: Go to next step 

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair procedures, because this may cause a malfunction.

2. Remove the rear No. 1 floor board. Refer to REMOVAL - Step 8 .
3. Connect the cable to the negative (-) auxiliary battery terminal.
4. Connect the Techstream to the DLC3.
5. Turn the power switch on (IG).
   NOTE:

   • After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair procedures, because this may cause a malfunction.
   • If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be stored. If this DTC is output, clear the DTC using the Techstream. Refer to DTC CHECK / CLEAR .
6. Enter the following menus: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan.
   NOTE:

   If the Active Test cannot be performed, skip it and proceed to the next step to check voltage. In accordance with fail-safe system operation, the power management control ECU sends a command to operate the battery cooling fan.

7. Select each air volume mode (1 to 6) in the "Driving the Battery Cooling Fan" Active Test to operate the battery cooling blower assembly.
8. Measure the voltage according to the value(s) in the table below.
   Fig 1: Measuring Resistance Of Battery Cooling Fan While Fan Is In Operation

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   S14-2 (VM0) - S14-4 (GND0)	Battery cooling blower is operating	Below 5 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Battery Cooling Blower Assembly)
   *b	Rear view of wire harness connector (to Battery Cooling Blower Assembly)

   NOTE:

   Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

   HINT: 

   Measure the voltage on the wire side of the connector that is part of the battery cooling blower.

9. Turn the power switch off.
10. Disconnect the cable from the negative (-) auxiliary battery terminal.
11. Install the rear No. 1 floor board.

NG → See step   5 

OK: Go to next step 

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair procedures, because this may cause a malfunction.

2. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to REMOVAL - Step 25 .
3. Disconnect connectors c1 and z17 from the battery smart unit.
   Fig 2: Identifying Battery Smart Unit & Connectors C1 & Z17

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Measure the resistance according to the value(s) in the table below.
   Fig 3: Checking HV Battery (Battery Temperature Sensor And Inlet Air Temperature Sensor)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   z17-6 (TBO) - c1-4 (IGCT)	Power switch off	10 kΩ or higher
   z17-12 (GBO) - c1-4 (IGCT)	Power switch off	10 kΩ or higher
   z17-5 (TB1) - c1-4 (IGCT)	Power switch off	10 kΩ or higher
   z17-11 (GB1) - c1-4 (IGCT)	Power switch off	10 kΩ or higher
   z17-4 (TB2) - c1-4 (IGCT)	Power switch off	10 kΩ or higher
   z17-10 (GB2) - c1-4 (IGCT)	Power switch off	10 kΩ or higher
   z17-1 (TCO) - c1-4 (IGCT)	Power switch off	10 kΩ or higher
   z17-7 (GCO) - c1-4 (IGCT)	Power switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Battery Smart Unit)

5. Connect the battery smart unit connectors.
6. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly.

NG → See step   4 

OK → See step   8 

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair procedures, because this may cause a malfunction.

2. Remove the upper hybrid battery cover sub-assembly. Refer to REMOVAL - Step 28 .
3. Check the wire harness and connectors of the battery temperature sensor and inlet air temperature sensor for abnormalities by sight and touch.
   Fig 4: Identifying Wire Harness & Connectors Of The Battery Temperature Sensor & Inlet Air Temperature Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Specified Condition

   There are no open or short circuits in the wire harness and connectors. There are no short circuits to other wire harnesses.

4. Install the upper hybrid battery cover sub-assembly.

NG → REPAIR HARNESS OR CONNECTOR 

OK → See step   9 

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair procedures, because this may cause a malfunction.

2. Remove the rear No. 1 floor board. Refer to REMOVAL - Step 8 .
3. Disconnect connector S14 from the battery cooling blower assembly.
   Fig 5: Identifying Battery Cooling Blower Assembly & S14 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Connect the cable to the negative (-) auxiliary battery terminal.
5. Turn the power switch on (IG).
6. Measure the voltage according to the value(s) in the table below.
   Fig 6: Measuring Voltage Of S14 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   S14-2 (VM0) - S14-4 (GND0)	Power switch on (IG)	Below 5 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Battery Cooling Blower Assembly)

   NOTE:

   Turning the power switch on (IG) with the battery cooling blower assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

7. Disconnect the cable from the negative (-) auxiliary battery terminal.
8. Connect the battery cooling blower assembly connector.
9. Install the rear No. 1 floor board.

NG → See step   6 

OK → See step   7 

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair procedures, because this may cause a malfunction.

2. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly. Refer to REMOVAL - Step 25 .
3. Disconnect connector S14 from the battery cooling blower assembly.
   Fig 7: Identifying Battery Cooling Blower Assembly & S14 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Disconnect connector c1 from the battery smart unit.
   Fig 8: Identifying Battery Smart Unit & C1 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Measure the resistance according to the value(s) in the table below.
   Fig 9: Measuring Resistance Of Battery Smart Unit With Connector End Views

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   S14-2 (VM0) and c1-7 (VM) - Other terminal	Power switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Battery Cooling Blower Assembly)
   *b	Rear view of wire harness connector (to Battery Smart Unit)

6. Connect the battery smart unit connector.
7. Connect the battery cooling blower assembly connector.
8. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8