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DESCRIPTION

1. Refer to the description for DTC P0AE6-225 .
   
2. This circuit uses the power management control ECU to monitor the system main relays and stops the system if a malfunction is detected in the relays, because it may be impossible to shut off the high-voltage system if any of the relays becomes stuck.
   

WIRING DIAGRAM

INSPECTION PROCEDURE

CAUTION:

1. When troubleshooting P0AA1-233, 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 P0AA1-233 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
   P0AA1-233 only is output.	A
   Any of the following DTCs are also output.	B

   
   

   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
   P0ADC-226	Hybrid Battery Positive Contactor Control Circuit High
   P0AE0-228	Hybrid Battery Negative Contactor Control Circuit High
   P0AE7-224	Hybrid Battery Precharge Contactor Control Circuit High
   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

   HINT:

   1. *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.
      
   2. P0AA1-233 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)

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 P0AA1-233.
   
   

   Result:

   
   

   Result	Result
   VH-Voltage after Boosting minus VL-Voltage before Boosting is 100 V or less.	A
   The preceding condition is not satisfied.	B

B	REPLACE INVERTER WITH CONVERTER ASSEMBLY (Click here)

A

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 (SMRB):

   Tester Connection	Switch Condition	Specified Condition
   S4-1 (CBI) - f2-1 (+)	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 P0AA1-233 is output, the hybrid battery junction block assembly must be replaced. Measuring resistance can determine if this is either a present or past malfunction.
      

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

   Standard Resistance (SMRG):

   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 P0AA1-233 is output, the hybrid battery junction block assembly must be replaced. Measuring resistance can determine if this is either a present or past malfunction.
      
   3. If the resistance is between 28.5 and 31.5 Ω, it can be determined that SMRP is stuck closed.
      

5. 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)