DTC    P0AA4-232    Hybrid Battery Negative Contactor Circuit Stuck Closed

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DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CAUTION:

1. When troubleshooting P0AA4-232, be sure to wrap the tools with electrical tape. (It is very dangerous if high voltage is shorted to ground through the tools.)
   
2. Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
   
3. After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work (Click here).
   

   HINT:

   1. Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
      
   2. If P0AA4-232 is stored, the hybrid system cannot be turned on.
      

NOTICE:

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work (Click here).

1. Connect the intelligent tester to the DLC3.
   

2. Turn the power switch on (IG).
   

3. Enter the following menus: Powertrain / Hybrid Control / DTC.
   

4. Check if DTCs are output.
   

   Result:

   Result	Proceed to
   P0AA4-232 only is output.	A
   DTCs shown in Table 1 are output simultaneously.	B
   DTCs shown in Table 2 are output simultaneously.	C

   
   

   Table 1 

   DTC No.	Relevant Diagnosis
   P0A1A-151, 155, 156, 200, 658, 659, 791, 792, 793	Generator Control Module
   P0A1B-163, 164, 168, 193, 511, 512, 661, 786, 794, 795, 796	Drive Motor "A" Control Module
   P0A1D-148	Hybrid Powertrain 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
   P0A4B-253	Generator Position Sensor Circuit
   P0A4C-513	Generator Position Sensor Circuit Range/Performance
   P0A4D-255	Generator Position Sensor Circuit Low
   P0A78-266, 267, 586	Drive Motor "A" Inverter Performance
   P0A94-442	DC / DC Converter Performance
   P0ADB-227	Hybrid Battery Positive Contactor Control Circuit Low
   P0ADC-226	Hybrid Battery Positive Contactor Control Circuit High
   P0ADF-229	Hybrid Battery Negative Contactor Control Circuit Low
   P0AE0-228	Hybrid Battery Negative Contactor Control Circuit High
   P0AE6-225	Hybrid Battery Precharge Contactor Control Circuit Low
   P0AE7-224	Hybrid Battery Precharge Contactor Control Circuit High
   P0AFC-129	Hybrid Battery Pack Sensor Module
   P0C76-523	Hybrid Battery System Discharge Time Too Long
   P2511-149	ECM/PCM Power Relay Sensor Circuit Intermittent
   P3004-132	Power Cable Malfunction
   P324E-788	MG-ECU Power Relay Intermittent Circuit
   U0110 (all INF codes)*1	Lost Communication with Drive Motor Control Module

   
   

   Table 2 

   DTC No.	Relevant Diagnosis
   P0AFC-123	Hybrid Battery Pack Sensor Module
   P0B3D-123	Hybrid Battery Voltage Sensor "A" Circuit Low
   P0B42-123	Hybrid Battery Voltage Sensor "B" Circuit Low
   P0B47-123	Hybrid Battery Voltage Sensor "C" Circuit Low
   P0B4C-123	Hybrid Battery Voltage Sensor "D" Circuit Low
   P0B51-123	Hybrid Battery Voltage Sensor "E" Circuit Low
   P0B56-123	Hybrid Battery Voltage Sensor "F" Circuit Low
   P0B5B-123	Hybrid Battery Voltage Sensor "G" Circuit Low
   P0B60-123	Hybrid Battery Voltage Sensor "H" Circuit Low
   P0B65-123	Hybrid Battery Voltage Sensor "I" Circuit Low
   P0B6A-123	Hybrid Battery Voltage Sensor "J" Circuit Low
   P0B6F-123	Hybrid Battery Voltage Sensor "K" Circuit Low
   P0B74-123	Hybrid Battery Voltage Sensor "L" Circuit Low
   P0B79-123	Hybrid Battery Voltage Sensor "M" Circuit Low
   P0B7E-123	Hybrid Battery Voltage Sensor "N" Circuit Low
   P0B83-123	Hybrid Battery Voltage Sensor "O" Circuit Low
   P308A-123	Hybrid Battery Voltage Sensor All Circuits Low

   HINT:

   1. *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
      
   2. 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	GO TO DTC CHART (HYBRID CONTROL SYSTEM) (Click here)
C	GO TO DTC CHART (HYBRID BATTERY SYSTEM) (Click here)

A

1. Connect the intelligent tester to the DLC3.
   

2. Turn the power switch on (IG).
   

3. Enter the following menus: Powertrain / Hybrid Control / DTC.
   

4. Read the freeze frame data of DTC P0AA4-232.
   

   Result:

   Result	Proceed to
   HV battery current (IB) is less than 3 A.	A
   HV battery current (IB) is 3 A or more.	B

5. Turn the power switch off.
   

A	REPLACE INVERTER WITH CONVERTER ASSEMBLY (Click here)

B

CAUTION:

Be sure to wear insulated gloves.

1. Check that the service plug grip is not installed.
   

   NOTICE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

2. Remove the upper hybrid battery cover sub-assembly.
   

3. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   S3-1 (CEI) - h2-1 (-)	Power switch off	10 kΩ or higher

   Text in Illustration 

   *1	Hybrid Battery Junction Block Assembly

   HINT:

   1. If a system main relay is stuck closed, inspect the hybrid battery junction block assembly without removing it from the vehicle, in order to keep the relay closed.
      
   2. If the result of reading the freeze frame data is B, the hybrid battery junction block assembly must be replaced. Measuring resistance can determine that this is either a present or past malfunction.
      

4. Install the upper hybrid battery cover sub-assembly.
   

NG	REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY (Click here)

OK
REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY (Click here)