DTC P0A9D (49), P0AC7 (51), P0ACC (53), P0AEA (121)

DTC P0A9D  : HV Battery Temperature Sensor 1 Circuit Low

DTC P0AC7  : HV Battery Temperature Sensor 2 Circuit Low

DTC P0AEA  : HV Battery Temperature Sensor 4 Circuit Low

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC (Electric Powertrain)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Check the parameter(s) of the corresponding DTC below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   HV Battery Module Temperature Sensor1 Voltage	Less than 0.07 V	V

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   HV Battery Module Temperature Sensor2 Voltage	Less than 0.07 V	V
   HV Battery Module Temperature Sensor3 Voltage	Less than 0.07 V	V
   HV Battery Module Temperature Sensor4 Voltage	Less than 0.07 V	V

   Do the current condition(s) match the threshold?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

2. Determine possible failure area (short in TBATT circuit, others)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Remove the service plug and the IPU cover .

   -3. Disconnect the following connector.

   Battery condition monitor module connector F (12P)

   -4. Measure the resistance between appropriate DTC's test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Battery condition monitor module connector F (12P): disconnected

   DTC	Test point 1	Test point 2
   P0A9D (TBATT1)	Battery condition monitor module connector F (12P) No. 1	Body ground
   P0AC7 (TBATT2)	Battery condition monitor module connector F (12P) No. 7
   P0ACC (TBATT3)	Battery condition monitor module connector F (12P) No. 2
   P0AEA (TBATT4)	Battery condition monitor module connector F (12P) No. 8

   Is there continuity?

   YES 

   Go to step 3.

   NO 

   Replace the battery condition monitor module .

3. Shorted wire check (TBATT line)

   -1. Disconnect the following connector.

   DTC P0A9D: High voltage battery module temperature sensor connector A (2P)

   DTC P0AC7: High voltage battery module temperature sensor connector B (2P)

   DTC P0ACC, P0AEA: High voltage battery module temperature sensor connector C (4P)

   Courtesy of HONDA, U.S.A., INC.

   Courtesy of HONDA, U.S.A., INC.

   -2. Measure the resistance between appropriate DTC's test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	DTC P0A9D: High voltage battery module temperature sensor connector A (2P) : disconnected
   	DTC P0AC7: High voltage battery module temperature sensor connector B (2P) : disconnected
   	DTC P0ACC, P0AEA: High voltage battery module temperature sensor connector C (4P) : disconnected
   	Battery condition monitor module connector F (12P): disconnected

   DTC	Test point 1	Test point 2
   P0A9D (TBATT1)	Battery condition monitor module connector F (12P) No. 1	Body ground
   P0AC7 (TBATT2)	Battery condition monitor module connector F (12P) No. 7
   P0ACC (TBATT3)	Battery condition monitor module connector F (12P) No. 2
   P0AEA (TBATT4)	Battery condition monitor module connector F (12P) No. 8

   Is there 1 MΩ or more?

   1. YES 

      Replace the following high voltage battery module temperature sensor .

      • DTC P0A9D: High voltage battery module temperature sensor 1
      • DTC P0AC7: High voltage battery module temperature sensor 2
      • DTC P0ACC: High voltage battery module temperature sensor 3
      • DTC P0AEA: High voltage battery module temperature sensor 4

      NO 

      Repair a short in the TBATT wire between the battery condition monitor module and the high voltage battery module temperature sensor.