DTC P0AA1-231: EV Battery Positive Contactor Circuit Stuck Closed: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / EV / Trouble Codes.
4. Check if DTCs related to the EV control system are output.

   Result

   Result	Proceed to
   Only P0AA1-231 is output or P0AA1-231 and DTCs other than the ones in the table below are also output.	A
   Any of the following DTCs are also output.	B

   DTC No.	Relevant Diagnosis
   P0A1A-151, 155, 156, 658, 659	Generator Control Module
   P0A1B-163, 164, 168, 193, 511, 512, 661, 786, 794, 795, 796	Drive Motor "A" Control Module
   P0A1D-148	EV Control Module
   P0A3F-243	Drive Motor "A" Position Sensor Circuit
   P0A40-500	Drive Motor "A" Position Sensor Circuit Range/Performance
   P0A41-245	Drive Motor "A" Position Sensor Circuit Low
   P0A78-266, 267, 586	Drive Motor "A" Inverter Performance
   P0ADC-226	EV Battery No. 1 Positive Contactor Control Circuit High
   P0C76-523	EV Battery System Discharge Time Too Long
   P2511-149	ECM/PCM Power Relay Sense Circuit Intermittent
   P3004-132	High Voltage Power Resource
   P324E-788	MG-ECU Power Relay Intermittent Circuit
   P3323-367	EV Battery No. 2 Positive Contactor Control Circuit High
   U0110 (all INF codes)*1	Lost Communication with Drive Motor Control Module "A"

   HINT: 

   • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
   • P0AA1-231 may be output due to a malfunction which causes the DTCs in the table above to be output. In this case, first troubleshoot the output DTCs in the table above. Then, perform a reproduction test to check that no DTCs are output.
5. Turn the power switch off.

B → See step   5 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / EV / Trouble Codes.
4. Read the freeze frame data of DTC P0AA1-231.

   Result

   Result	Proceed to
   VL-Voltage is 60 V or more.	A
   VL-Voltage is less than 60 V.	B

5. Turn the power switch off.

B → See step   4 

A → See step   3