DTC P0AA4-232: EV Battery Negative 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 P0AA4-232 is output or P0AA4-232 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
   P060B-134, 135, 570	Internal Control Module A/D Processing Performance
   P06A4-209	Sensor Reference Voltage "D" Circuit Low
   P06A5-210	Sensor Reference Voltage "D" Circuit High
   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
   P0A1F-832, 833	Battery Energy 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
   P0A94-585, 587	Inverter Performance
   P0AC0-817	EV Battery Pack Current Sensor "A" Circuit Range/Performance
   P0ADB-227	EV Battery No. 1 Positive Contactor Control Circuit Low
   P0ADC-226	EV Battery No. 1 Positive Contactor Control Circuit High
   P0ADF-229	EV Battery Negative Contactor Control Circuit Low
   P0AE0-228	EV Battery Negative Contactor Control Circuit High
   P0AE6-225	EV Battery Precharge Contactor Control Circuit Low
   P0AE7-224	EV Battery Precharge Contactor Control Circuit High
   P0AFC-129	EV Battery Pack Sensor Module
   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
   P33A2-123	Total Power Resource IB Sensor Circuit Low
   P33A3-123	Total Power Resource IB Sensor Circuit High
   U0110 (all INF codes)*1	Lost Communication with Drive Motor Control Module "A"
   U0111-826	Lost Communication with Battery Energy Control Module "A"

   HINT: 

   • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
   • P0AA4-232 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   6 

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 Battery / Trouble Codes.
4. Check if DTCs related to the EV battery system are output.

   Result

   Result	Proceed to
   DTCs related to EV Battery are not output, or DTCs other than the following are output.	A
   Any of the following DTCs are also output.	B

   DTC No.	Relevant Diagnosis
   P0AFC-123	EV Battery No. 1 Pack Sensor Module
   P0B3D-123	EV Battery No. 1 Voltage Sense "A" Circuit Low
   P0B42-123	EV Battery No. 1 Voltage Sense "B" Circuit Low
   P0B47-123	EV Battery No. 1 Voltage Sense "C" Circuit Low
   P0B4C-123	EV Battery No. 1 Voltage Sense "D" Circuit Low
   P0B51-123	EV Battery No. 1 Voltage Sense "E" Circuit Low
   P0B56-123	EV Battery No. 1 Voltage Sense "F" Circuit Low
   P0B5B-123	EV Battery No. 1 Voltage Sense "G" Circuit Low
   P0B60-123	EV Battery No. 1 Voltage Sense "H" Circuit Low
   P0B65-123	EV Battery No. 1 Voltage Sense "I" Circuit Low
   P0B6A-123	EV Battery No. 1 Voltage Sense "J" Circuit Low
   P0B6F-123	EV Battery No. 1 Voltage Sense "K" Circuit Low
   P0B74-123	EV Battery No. 1 Voltage Sense "L" Circuit Low
   P0B79-123	EV Battery No. 1 Voltage Sense "M" Circuit Low
   P308A-123	EV Battery No. 1 Voltage Sensor All Circuits Low

   HINT: 

   P0AA4-232 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   7 

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 P0AA4-232.

   Result

   Result	Proceed to
   Battery No. 1 Current Value is 0.5 A or more.	A
   Battery No. 1 Current Value is less than 0.5 A.	B

5. Turn the power switch off.

B → See step   5 

A → See step   4