DTC P0A94-587: DC / DC Converter Performance: 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

   Result	Proceed to
   DTC P0A94-587 only is output. Alternatively, P0A94-587 and any DTCs other than P0A1F-129, P0A94-442 or P0A94-585 are output.	A
   P0A94-587 and P0A1F-129 (HV battery voltage circuit malfunction) are output.	B
   P0A94-587 and P0A94-442 (abnormal voltage execution value) are output.	C
   P0A94-587 and P0A94-585 (boost converter voltage (VL) sensor performance problem) are output.	D

D → See step   11 

C → See step   10 

B → See step   9 

A: Go to next step 

1. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
2. Read and record the DTCs and freeze frame data.
3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
4. Clear DTCs and freeze frame data.

NEXT: Go to next step 

1. Turn the power switch on (READY). (*1)
2. Move the shift lever to the N position. (*2)
3. Turn the A/C switch to the MAX COOL position. (*3)
4. Select the following menu items: Powertrain / Hybrid Control / Data List / Batt Pack Current Val. (*4)
5. Confirm that "Batt Pack Current Val" is more than 3 A. (*5)
6. Leave the vehicle in the condition specified in preceding steps (*3) and (*5) for 15 seconds. (*6)
7. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes. (*7)
8. Check if DTCs are output. (*8)
   NOTE:

   If the low battery charge warning light comes on, move the shift lever to the P position and start the engine to charge the HV battery. After the engine stops, perform steps (*1) through (*8) again.

   Result

   Result	Proceed to
   No DTCs are output.	A
   P0A1F-129 (HV battery voltage circuit malfunction) is output.	B
   P0A94-585 (boost converter voltage (VL) sensor performance problem) is output.	C
   P3000-388 (discharge inhibition) is output.	D
   P3004-132 (high voltage power supply line problem) is output.	E

E → See step   12 

D → LEAVE VEHICLE IN P POSITION, AND CHARGE HV BATTERY IN IDLE STATUS UNTIL IDLING STOPS (PERFORM STEPS (*1) THROUGH (*8)) 

C → See step   10 

B → See step   12 

A: Go to next step 

1. Perform a road test that repeats full acceleration to 37 mph (60 km/h) and then braking to a complete stop three times. (*9)
   NOTE:

   Perform this test only in an appropriate safe location, in accordance with all local laws.

2. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes. (*10)
3. Check if DTCs are output. (*11)

   Result

   Result	Proceed to
   No DTCs are output.	A
   P0A1F-129 (HV battery voltage circuit malfunction) is output.	B
   P0A94-585 (boost converter voltage (VL)) sensor performance problem) is output.	C
   P3000-388 (discharge inhibition) is output.	D
   P3004-132 (high voltage power supply line problem) is output.	E

E → See step   12 

D → LEAVE VEHICLE IN P POSITION, AND CHARGE HV BATTERY IN IDLE STATUS UNTIL IDLING STOPS (PERFORM STEPS (*9) THROUGH (*11)) 

C → See step   10 

B → See step   12 

A: Go to next step 

1. Turn the power switch on (READY).
2. Select the following menu items: Powertrain / Hybrid Control / Data List / Power Resource VB, VL-Voltage before Boosting, VH-Voltage after Boosting.
3. Turn the engine off, move the shift lever to the N position, and read the data list when the vehicle is stationary.

   Result

   Result	Proceed to
   Both of the following are not satisfied.	A
   Both of the following are satisfied: Difference between "Power Resource VB" and "VH-Voltage after Boosting" is less than 5 V. Difference between VL-Voltage before Boosting and "VH-Voltage after Boosting" is more than 30 V.	B
   Both of the following are satisfied: Difference between "VH-Voltage after Boosting" and "VL-Voltage before Boosting" is more than 5 V. Difference between "Power Resource VB" and "VH-Voltage after Boosting" is less than 20 V.	C

C → See step   12 

B → See step   10 

A: Go to next step 

1. Turn the power switch on (IG).
2. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
3. Read the freeze frame data of DTC P0A94-587.

   Result

   Result	Proceed to
   Both of the following are satisfied or both of the following are not satisfied.	A
   "Power Resource VB" is less than 230 V or more than 395 V.	B
   "VL-Voltage before Boosting" is less than 230 V or more than 395 V.	C

C → See step   10 

B → See step   12 

A: Go to next step 

1. Read the freeze frame data of DTC P0A94-587.

   Result

   Result	Proceed to
   Others (Freeze frame data is not stored).	A
   Both of the following are satisfied: Sum of all "Battery Block" voltage is more than (HV battery voltage - 55 V) Sum of all "Battery Block" voltage is less than (HV battery voltage + 35 V)	B
   Neither A nor B is satisfied.	C

C → See step   12 

B → See step   10 

A: Go to next step 

1. Turn the power switch on (READY).
2. Select the following menu items: Powertrain / Hybrid Control / Data List / Battery Block Vol -V01 to 20, Power Resource VB.
3. Turn the engine off, move the shift lever to the N position, and read the data list of all battery block and HV battery voltages, when the vehicle is stationary.

   Result

   Result	Proceed to
   Both of the following are satisfied: Sum of all "Battery Block" voltage is more than (HV battery voltage -55 V) Sum of all "Battery Block" voltage is less than (HV battery voltage +35 V)	A
   The preceding condition is not satisfied.	B

B → See step   13 

A → See step   10