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

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
4. Check if DTCs are output.

   Result

   DTC P0A1F-123 is output.

YES → GO TO INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC 

NO: Go to next step 

1. Remove the service plug grip. Refer to REMOVAL .
2. Remove the battery smart unit. Refer to REMOVAL .

   HINT: 

   Do not disconnect the battery smart unit connectors.

3. Connect the Techstream to the DLC3.
4. Turn the power switch on (IG).
5. Select the following menu items: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan.

   HINT: 

   Check "Cooling Fan Mode 1" in the data list using the Techstream. If the "Cooling Fan Mode 1" to 6, it is not necessary to perform the Active Test.

6. Select each air volume mode (1 to 6) in the "Driving the Battery Cooling Fan" active test to operate the battery cooling blower assembly.
7. Measure the voltage according to the value(s) in the table below while the cooling fan is operating.
   Fig 1: Identifying n2 Connector Terminal VM End View

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Specified Condition
   VM (n2-8) - Body ground	Below 5 V

   HINT: 

   If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be set.

OK → See step   6 

NG: Go to next step 

1. Disconnect connector n2 from the battery smart unit.
2. Disconnect connector N38 from the battery cooling blower assembly.
3. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying N38 And n2 Connectors Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance (Check for short)

   Tester Connection	Specified Condition
   VM0 (N38-2) or VM (n2-8) - Other terminal	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Turn the power switch on (IG).
2. Measure the voltage according to the value(s) in the table below.
   Fig 3: Identifying Battery Smart Unit N2 Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Specified Condition
   VM (n2-8) - GND (n2-5)	Below 5 V

   HINT: 

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

NG → See step   7 

OK → See step   5 

1. Disconnect connector o1 from the battery smart unit.
2. Disconnect connector n2 from the battery smart unit.
3. Measure the resistance according to the value(s) in the table below.
   Fig 4: Identifying o1 And n2 Connector Terminal Identification of Battery Smart Unit

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance (Check for short)

   Tester Connection	Specified Condition
   TB0 (o1-7) - IGC1 (n2-1)	10 kΩ or higher
   GB0 (o1-17) - IGC1 (n2-1)	10 kΩ or higher
   TB1 (o1-6) - IGC1 (n2-1)	10 kΩ or higher
   GB1 (o1-16) - IGC1 (n2-1)	10 kΩ or higher
   TB2 (o1-5) - IGC1 (n2-1)	10 kΩ or higher
   GB2 (o1-15) - IGC1 (n2-1)	10 kΩ or higher
   TB3 (o1-4) - IGC1 (n2-1)	10 kΩ or higher
   GB3 (o1-14) - IGC1 (n2-1)	10 kΩ or higher
   TC0 (o1-1) - IGC1 (n2-1)	10 kΩ or higher
   GC0 (o1-11) - IGC1 (n2-1)	10 kΩ or higher

NG → See step   8 

OK → See step   7