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

   Output DTC	Proceed to
   DTCs P0A94-587 and P0A1F-129 (HV battery voltage circuit malfunction)	A
   DTCs P0A94-587 and P0A94-442 (Abnormal voltage execution value)	B
   DTCs P0A94-587 and P0A94-585 (Boost converter voltage (VL) sensor performance problem)	C
   DTC P0A94-587 only, or DTC P0A94-587 and DTCs other than above	D

A → GO TO  INSPECTION PROCEDURE  INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC (P0A1F-129) 

B → See step   6 

C → GO TO  INSPECTION PROCEDURE   INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC (P0A94-585) 

D: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Read and record the DTCs and freeze frame data.
4. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
5. Clear DTCs and freeze frame data.

NEXT: Go to next step 

1. Turn the power switch on (READY) and move the shift lever to the N position. (*1)
2. Turn the A/C switch to the MAX COOL position. (*2)
3. Select the following menu items: Powertrain / Hybrid Control / Data List / Power Resource IB.
4. Confirm that "Power Resource IB" is more than 3 A. (*3)
5. Leave the vehicle in the condition specified in steps (*2) and (*3) above for 15 seconds. (*4)
   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 (*5) again.

6. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
7. Check if DTCs are output. (*5)

   Result

   DTC No.	Relevant Diagnosis	Proceed to
   P0A1F-129	HV battery voltage circuit malfunction	A
   P0A94-585	Boost converter voltage (VL) sensor performance problem	B
   P3000-388	Discharge inhibition	C
   P3004-132	Power Cable Malfunction	D
   No DTC is output.	-	E

A → See step   7 

B → See step   6 

C → LEAVE VEHICLE IN P POSITION, AND CHARGE HV BATTERY IN IDLE STATUS UNTIL IDLING STOPS (PERFORM STEPS (*1) THROUGH (*5)) 

D → See step   7 

E: Go to next step 

1. Connect the Techstream to the DLC3. (*6)
2. Perform a road test that repeats full acceleration to 60 km/h (37.3 mph) and then full braking to a complete stop several times. (*7)
3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes. (*8)
4. Check if DTCs are output. (*9)

   Result

   DTC No.	Relevant Diagnosis	Proceed to
   P0A1F-129	HV battery voltage circuit malfunction	A
   P0A94-585	Boost converter voltage (VL) sensor performance problem	B
   P3000-388	Discharge inhibition	C
   P3004-132	Power Cable Malfunciton	D
   No DTC is output.	-	E

A → See step   7 

B → See step   6 

C → LEAVE VEHICLE IN P POSITION, AND CHARGE HV BATTERY IN IDLE STATUS UNTIL IDLING STOPS (PERFORM STEPS (*6) THROUGH (*9)) 

D → See step   7 

E: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (READY).
3. Select the following menu items: Powertrain / Hybrid Control / Data List / Power Resource VB, VL-Voltage before Boosting, VH-Voltage after Boosting.
4. Read the data list when the shift lever is in the N position (the engine is off) and the vehicle is stationary.

   Result

   Voltage	Voltage Difference	Result
   Difference between HV battery voltage (Power Resource VB) and boost converter voltage (VL-Voltage before Boosting)	50 V or less	1
   Difference between HV battery voltage (Power Resource VB) and inverter voltage (VH-Voltage after Boosting)	70 V or less	2
   Difference between boost converter voltage (VL-Voltage before Boosting) and inverter voltage (VH-Voltage after Boosting)	90 V or less	3

   Result

   Result	Proceed to
   Only 2 is satisfied.	A
   Only 3 is satisfied.	B
   1, 2, and 3 are all satisfied (normal condition)	C

A → See step   6 

B → See step   7 

C → See step   8