DTC P0AE7-224: Hybrid Battery Precharge Contactor Control Circuit High: Procedure

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

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

2. Disconnect connector z17 from the hybrid vehicle converter.
3. Turn the power switch on (IG).
4. Measure the voltage according to the value(s) in the table below.
   Fig 1: Identifying z17 Connector From The Hybrid Vehicle Converter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   z17-4 (SMRP) - Body ground	Power switch on (IG)	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *1	Rear view of wire harness connector (to Hybrid Vehicle Converter)

   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle converter connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

5. Turn the power switch off.
6. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   z17-4 (SMRP) - Other terminal	Power switch off	10 kΩ or higher

7. Connect the hybrid vehicle converter connector.

NG → See step   2 

OK → See step   3 

1. Disconnect connector A58 from the hybrid vehicle control ECU.
2. Disconnect connector z17 from the hybrid vehicle converter.
3. Turn the power switch on (IG).
4. Measure the voltage according to the value(s) in the table below.
   Fig 2: Identifying z17 Connector From The Hybrid Vehicle Converter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   z17-4 (SMRP) - Body ground	Power switch on (IG)	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *1	Rear view of wire harness connector (to Hybrid Vehicle Converter)

   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle converter connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

5. Turn the power switch off.
6. Connect the hybrid vehicle converter connector.
7. Connect the hybrid vehicle control ECU.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4